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Firefox Working to Fix Memory Leaks

Posted by CmdrTaco on Mon Sep 24, 2007 11:29 AM
from the important-but-boring-work dept.
Christopher Blanc writes "Many Mozilla community members, including both volunteers and Mozilla Corporation employees, have been helping to reduce Firefox's memory usage and fix memory leak bugs lately. Hopefully, the result of this effort will be that Firefox 3 uses less memory than Firefox 2 did, especially after it has been used for several hours." Here's hoping. Frequent restarts of things on my computer make me furious. I can't imagine why anyone would tolerate such things.
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  • about time! (Score:4, Insightful)

    by downix (84795) on Monday September 24 2007, @11:32AM (#20730379) Homepage
    Too many apps nowadays just throw out RAM like it was yesterdays newspaper! It is sloppy coding, and I'm tired of having to put 2GB of RAM into a system just to surf the net nowadays.
    • I completely agree. I only have 384MB on the machine from which I'm writing this. There isn't room on the mb for any more than that. I got totally tired of the system seizing up when I used to use Firefox. So I switched to Opera. That's not completely immune to seize-up/memory concumption problems either. So I'll keep an eye open for significant improvements to FF, and just possibly switch back if they fix the memory bugs.

      I hope they won't totally forget the folks using older-specification systems, bu
    • by www.sorehands.com (142825) on Monday September 24 2007, @12:10PM (#20731041) Homepage
      It is because people accept poor programming as the norm. Oh, yeah, just reboot it and it'll be fine.

      I consult for someone who uses ACT! 2005. When they got the upgrade notice, they asked me to check it out. I spoke to ACT! support and they told me "We improved performance by releasing resources that we are no longer using." I said, "THAT IS A BUG FIX!" Anybody writing code outside of school should be doing it, and if I was grading their code, I would take points off for that.

      I'd like to see some of these software companies that do this get sued for such poor coding practices.
      • by TemporalBeing (803363) on Monday September 24 2007, @11:55AM (#20730767) Homepage Journal

        Perhaps the culprit is C++. Languages with auto-garbage-collection or are database-engine-based tend to clean up automatically or cache to disk more effectively.
        Actually, the big language culprits would be those with auto-garbage collection, etc. as they tend to have lazier programmers that don't "need" to manage their own resources, and in some cases even prohibit the programmer from being able to manage their resources.

        C/C++ and similar languages, on the other hand, force the programmers to manage their resources. In those cases, the programmers would likely be just not designing their programs well, or employing bad resource management. Yes, managing resources can be hard - one project I worked on had to go through several months of testing to get the resources properly managed, and even then some of the resources were still a little uncontrollable due to legacy code or Windows APIs, but overall the thing was pretty stable and any memory leaks were mostly due to Windows APIs.

        In either case, I can't tell you how many times I have heard (especially from Java programmers) something along the lines of the following: "RAM is cheap", "processors are getting faster", "computers will be ready for this when we deliver it", "hardware is cheaper than programmers"

        No offense, but to rely on hardware always being getting faster, or the cost of adding more RAM always being cheaper, etc. is a bad premise to rely on. Already with multi-core processors we are seeing slower processors being combined into a single processor get the equivalent processing power of a faster processor (e.g. two 1.8 Ghz cores rated equally to a single 3 Ghz core); thus the premise breaks down. Also, I want to be able to do more with the faster processors and additional RAM, rather than simply do the same job I could do yesterday only in "better" software.

        The real answer is doing your job right, and using the right tool - which is not necessarily the easiest tool to use either. We also need to get back to writing applications that have good, if not great, performance with minimal resource requirements (e.g. RAM and processor). If we're not going this at the API/library level - at the very least - then the programs and library/APIs that rely on that API/library level will have worse performance no matter what they do. But in either case it doesn't get done unless the programmers do their job, and use tools that allow them to do it.
        • by jellomizer (103300) * on Monday September 24 2007, @12:44PM (#20731545)
          I am not sure where you think C++ Programmers are more careful the Other Higher language programmers. A lot of C++ Programmers are really not that good the only reason they use C++ because they had to take it part of their college requirements, thus being the only language they know. Problem with C++ is the fact programming memory is so intensive that most people will be willing to let it leak because of all the extra work it will take to clean it up. They program in C++ not because it is the best tool for the job but the one they know the best. I have seen cases where C++ Project get killed because they take way to long to write and more to debug, while Python, VB or Java Programmers seem to get the job done. Most projects are not Open Source, Most programming is actually just custom program for businesses so these programmers are paid by the hour.

          I Agree with you the Duel Cores are not equal to systems with twice the GigaHertz and the singlecore twice as fast system normally will out preform the application written. But that isn't about C++ Program or Java Programming, It is about Multi-Threaded programming. Parallel processing is a different form of programming that most programmers shy away from. But still the fact if you are paying a programmer $20 and hour and it takes them twice as long to get a 10% increase in speed it would be better off buying extra RAM then paying the programmer.

          Now if you are getting a boxed application that is different because the cost of application development programming is spread across all the people who buy it. So by Doubling the price of the Shrink Wrapped App. say from $80 to $160 and everyone gets a 10% increase in speed then it is worth it to put the extra in and get it more optimized, the degree of benefit will outweigh the costs.

          The thing that usually gets me like comments like this parent it assumes a completely Academic Computer Science approach to all problems. While real life requires making trade offs and sacrificing performance is often a good trade off to make because most of the time it is unnoticeable, most computers spend most of their time idle anyways, and most application are idle waiting for inputs. So in the once in a while heavy processing moment say in this case an HTML Render adding 1 second to the load in real life most people wont notice unless they are going back and forward button crazy. Or doing a batch rendering job. As for memory I am surprised that you didn't bring up the large quanity of 32bit systems still out there being sold as new only handling a max of 4 GB or RAM so for a large population RAM limits are an issue again.
        • java memory profile (Score:5, Interesting)

          by sentientbrendan (316150) on Monday September 24 2007, @01:33PM (#20732285)
          > Actually, the big language culprits would be those with auto-garbage collection,
          > etc. as they tend to have lazier programmers

          Actually, it isn't lazier programmers. The problem is that existing garbage collection implementations have horrible memory profile.

          If you look at the memory usage of a java program, it's about as bad as a c program that does nothing but leak memory. Practically speaking, java does little to free memory until it has *run out of memory*. Then when it does run out of memory and it needs to clean things up, things get slow as hell.

          >The real answer is doing your job right, and using the right tool - which is not necessarily
          >the easiest tool to use either.

          Yes! Unfortunately, academics and many novice programmers (who just got finished being trained by academics) are unfamiliar with the powerful tools available like C++. Going to school can give you the mistaken impression that garbage collection is *a good thing* because everyone uses it there. The truth is that C++ is a very complicated language with a steep learning curve, but that many times it is simply the only tool that is suitable for the job.

          If your program is IO bound, like a web application front end, you are in a great position, because essentially *any* tool will do the job, even if the performance is abysmal. You can use java, ruby, or whatever. And you should, becuase those languages don't present you with the complexity of c++.

          Unfortunately, many programs *are not IO bound* and the performance and memory profile of the underlying tool are very important. This is most true of interactive non parializable programs. So, a good example would be bittorrent programs. Consider utorrent vs azureas, one in c++ and one in java. utorrent is fairly light weight and easy to use because of its performance characteristics. Azureus is a powerful and well engineered program, but it sure as hell is slow and chews up memory.
      • Sorry, but quite a few other browsers (Opera, Konqueror, Safari(the WebKit part anyways)) are written in C++, and they don't seem to have near the problems Firefox has.
      • by ClosedSource (238333) on Monday September 24 2007, @01:23PM (#20732153)
        A well-written C++ program is going to free memory much faster than a GC can. The value of GC is that you don't have to worry about forgetting to free memory, it will happen - eventually.
        • If you can't code without hand-holding tools like automatic garbage collection, perhaps you belong in a different profession!
          Professional computer programming, for example.
        • by SilentChris (452960) on Monday September 24 2007, @11:49AM (#20730685) Homepage

          If you can't code without hand-holding tools like automatic garbage collection, perhaps you belong in a different profession!


          Or perhaps they're too busy thinking about clearly-defined objects, robust interfaces, clean documentation and the "big picture" then to worry about moving individual bytes around.

          Likewise, I don't trust any artist using Flash today. They should clearly know how to code, in assembly, animation and transitions. Use of a timeline is for losers. The creative process should always be sacrificed for knowing the code inside out. /sarcasmoff
          • by caerwyn (38056) on Monday September 24 2007, @11:56AM (#20730797)
            Or perhaps they're too busy thinking about clearly-defined objects, robust interfaces, clean documentation and the "big picture" then to worry about moving individual bytes around.

            Actually, I'd say they're not busy enough- if they actually had been, proper memory management should simply fall into place on top of a clean architecture. If you're trying to shoehorn memory management back into something that didn't support it before, you're going to have issues- and this applies whether you're doing c/c++ style management, reference counting, or garbage collecting.
          • by Kristoph (242780) on Monday September 24 2007, @12:00PM (#20730883)
            A computer, by definition, 'moves bytes around'. One might argue that this is the job of the computer (or language or VM or whatever) and not programmer but if you don't understand how / why and when the bytes are moved around then you are a poorer programmer for it.

            C++ yields superior performance and memory usage, than higher level languages, in the hands of a skilled C++ programmer and it can lead to bloatware in the hands of a novice.

            There is this old saying about blaming your tools for a poor job and it applies to software development too.

            ]{

            • by dgatwood (11270) on Monday September 24 2007, @01:49PM (#20732643) Journal

              Precisely. A skilled craftsman does not blame the tools. A skilled craftsman does the job right, and if it cannot be done right with the tools at hand, he/she goes and gets tools that are appropriate for the job.

              Poor programming is possible in any language, and garbage-collected languages are no exception. I would also caution that garbage-collected languages tend to encourage more novice programmers because of the apparent ease of use (it isn't really easier). This results in a larger number of poorly-written apps by people who think they know how to write software. Taking away the need to explicitly manage memory just encourages lazy programmers who can always find something else to be sloppy about.

              As for garbage collection making this sort of thing magically go away, that simply isn't the case. Working around garbage collection with things like "soft references" is a disgusting hack and is actually far harder than simply doing explicit memory management in the first place. Anyone who says differently has never had to manage any complex data structures that reference each other in non-trivial ways. The alternative is to basically write your own code that explicitly walks the data structure, deleting circular references, etc. If you're going to that much trouble, you are doing just as much work as you would for explicit memory management, but without the performance benefits from actually being able to destroy the objects immediately, and thus garbage collection is just hurting performance without providing any real benefit.

              Basically, apart from the really trivial cases (most of which could be solved just as easily by simply creating a stack-local auto-destroy variant of malloc), garbage collection causes more problems than it solves. In my book, garbage collection in programming language ranks right up there with multiple inheritance as one of the worst ideas ever conceived.

          • by Hatta (162192) on Monday September 24 2007, @12:26PM (#20731293) Journal
            Likewise, I don't trust any artist using Flash today.

            That's a good instinct. Never trust anyone using Flash.
        • by suv4x4 (956391) on Monday September 24 2007, @11:50AM (#20730691)
          If you can't code without hand-holding tools like automatic garbage collection, perhaps you belong in a different profession!

          Firefox's problem is architectural and not one of garbage collection.

          XUL is inherently single-threaded and JavaScript based. Try out any XUL application out there and you'll see how you get the same poor performance, speed and resource usage as with Firefox (try Miro Player and Joost).

          The Firefox developers are literally throwing out more C code with every release, replacing it with JavaScript code.

          Leaks (in the classical sense) aren't what's causing Firefox's abysmal performance, and this is why Firefox 2 performs worse than Firefox 1.5, despite one of the "features" of Firefox 2 was supposedly plenty of fixed memory leaks.

          Actually I'm pretty sure they're in denial as to the cause of their problems. Announcing they're working on fixing "memory leaks" just supports their ability to continue their delusion.

          • Mod parent up (Score:5, Insightful)

            by Anonymous Coward on Monday September 24 2007, @12:14PM (#20731111)
            The parent post is completely correct. The main problem with Firefox and Mozilla in general is the XUL architecture. It is single-threaded such that JavaScript cannot run in multiple threads. And I've tried. It can't be done, Firefox will actually crash. (You can try with XPCOM, but it will crash.) I asked, and the solution given to me by the Firefox community (which isn't necessarily the developers, mind you) was to use Java from JavaScript, which is a non-starter if you want to write a cross-platform extension. (Not because Java isn't crossplatform, but because you can't guarantee that Firefox will be installed with a JVM.)

            Firefox's problem is architectural and not one of garbage collection.
            Unfortunately part of their problem is garbage collection - it's due to their architecture, but they have at least four separate memory allocation schemes going:

            1. Custom malloc/free implementation. (Yes, custom - not from libc.)
            2. C++ new/delete operators, which for all I know may be overridden to use their malloc/free.
            3. One of the first two with reference counting to decide when to free/delete.
            4. JavaScript mark-and-sweep GC.

            Dealing with this causes some truly insane hacks, like the absolutely insane DOM C++/JavaScript implementation. (They're C++ objects, exposed as JavaScript objects, using something that's like XPCOM but isn't due to the overhead XPCOM imposes. I really don't understand it.)

            Ultimately, though, it's worse than all that. All this crap leaves the code completely opaque, and actively prevents contributors from contributing code without having to learn an insane amount of infrastructure decisions.

            It makes a project that's supposed to be open source effectively closed off to only the "official" developers: almost open source in name only.
            • Re:Mod parent up (Score:5, Interesting)

              by BZ (40346) on Monday September 24 2007, @01:59PM (#20732805) Homepage
              > 1. Custom malloc/free implementation. (Yes, custom - not from libc.)

              Uh... No. There are some arena allocators in use in the codebase for very specific tasks, but there is no custom malloc/free.

              > They're C++ objects, exposed as JavaScript objects, using something that's like XPCOM but isn't

              Actually, to be exposed to JS in Gecko something more or less has to be an XPCOM object at the moment. Then the XPConnect layer handles the glue between JS and C++.

              > It makes a project that's supposed to be open source effectively closed off to only the
              > "official" developers

              As someone who got into this project without being in any way "official", I beg to differ! ;)
          • by jsebrech (525647) on Monday September 24 2007, @12:15PM (#20731131)
            XUL is inherently single-threaded and JavaScript based. Try out any XUL application out there and you'll see how you get the same poor performance, speed and resource usage as with Firefox (try Miro Player and Joost). ...

            Actually I'm pretty sure they're in denial as to the cause of their problems. Announcing they're working on fixing "memory leaks" just supports their ability to continue their delusion.


            They're not in denial. They're working on tamarin [mozilla.org], a replacement/upgrade of their javascript engine based on the same engine that's in flash 9 / actionscript 3.

            Tamarin will run javascript 2, which will to do javascript what the move from actionscript 2 to 3 did for flash/flex. In short: it will make non-toy applications easily done, instead of just marginally feasible. They plan to migrate the firefox UI and extensions to javascript 2, which should negate the performance issues. Only problem: it won't be ready for FF3.
        • by ultranova (717540) on Monday September 24 2007, @12:17PM (#20731165)

          If you can't code without hand-holding tools like automatic garbage collection, perhaps you belong in a different profession!

          Statements like this are why I prefer Java programs to C ones. Mandatory bounds checking means that no macho idiot can turn it off, no matter how full of hubris he is. But even assuming a 100% perfect coder, does it really make sense to use his precious time to worry about memory management when the computer can do that automagically ?

          • by Wavicle (181176) on Monday September 24 2007, @02:37PM (#20733391)
            You realize, of course, you are seriously going against Slashdot groupthink here. Still, if I had mod points, I'd give you one. Macho programmers who think they are too awesomely skillful to screw up are the ones whose screwups always take me the most time to chase down.

            Frankly if you can't look at a problem and then pull out five or six languages from your tool belt and evaluate which will be the best for this job, then you are a bad programmer. Don't code in C++ that which could easily be done in Python. Don't code in Python that which could easily be done in Bash. If you don't have a compelling argument for using C, DON'T USE IT!

            Sometimes I think Java is awful for no other reason than companies tend to believe that using one language for other is a net gain. That has never been my experience except when your very best programmers aren't all that good either. If you insist that everything run on the Java runtime, use Jython and embed Python. A good example of multi-language gains can be seen with embedded Lua. There are many applications out there that use Lua "under the covers" so that things that do not have to be written in C++ aren't. This includes games (I believe WoW is one).
            • by plover (150551) * on Monday September 24 2007, @04:28PM (#20734995) Homepage Journal

              Frankly if you can't look at a problem and then pull out five or six languages from your tool belt and evaluate which will be the best for this job, then you are a bad programmer.

              While I agree with this sentiment on principle, in practice this has proven to yield unworkable solutions. Different people bring different skillsets to the table. You may have a dozen developers who all have C++ in common, but to varying degrees. One may be more skilled in Perl, another in smalltalk, another in Python, and three more in Java. Divvy up the specs and tell each one to "Write your code using the best tool for the job." Then spend another year trying to integrate the pieces, and when they quit try to hire someone who can maintain the hydra.

              Picking a single language for a project (at least at the component level) is pretty much a requirement.

              Even though they try to hand-wave it away, this has been a big problem in the Microsoft .NET world. When it was introduced, Microsoft promised that all .NET languages were equal, first-class languages (my interpretation at the time was that C# programmers were instantly demoted to VB programmers :-( ) and that a developer could write in whichever .NET language they were most comfortable. But there are C# programmers and VB.NET programmers who don't really speak each other's language, even though they all compile down to the same MSIL. Trying to get them to maintain each others code leads to a lot of squabbling.

              It's easy to say "A good programmer can write in any of these languages" but in reality it's much harder to find a lot of good programmers that are both willing and able to competently do maintenance in all of the languages you might end up with.

          • by i7dude (473077) on Monday September 24 2007, @12:09PM (#20731011)

            Your argument is nonsense. If what you said held true, large scale applications should be able to be written is assembler. Without high level tools it wouldn't be feasible to create applications the scale we do today.


            Wrong. What he is saying is that people who choose to use C/C++ for their applications should be competent enough to properly handle their own allocation and de-allocation of memory. If your abilities as a programmer preclude you from properly managing your application's memory then you need to look at alternatives that will take care of that for you.

            There are plenty of languages out there that offer things like garbage collection. Developers need to make better choices about which tools they use to meet their needs, and also understand their limitations and work within those parameters.

            dude.
      • What people call the memory gobbling bug is actually also a CPU hogging bug, and it is still present in Firefox version 2.0.0.7, even though the bug was reported perhaps 5 years ago. Versions 2.0.0.7 and 2.0.0.6 are far more stable than previous versions, but Firefox is still the most unstable program in common use.

        The CPU hogging bug in Firefox may be caused by inadequate allocation of resources. Maybe the chaining of the event handler code with numerous windows open is an issue.

        Firefox crashes Microsoft Windows. Apparently there is a bug in Windows, or more than one, that causes the entire Microsoft Windows OS to become unstable when Firefox starts CPU hogging. In any case, the only way to get Windows back to a stable state after killing Firefox is to re-start the computer.

        It's interesting that Firefox can be used to show that Windows is an unstable OS, in some cases. Linux is completely stable; it is only necessary to kill Firefox to regain resources.

        The Firefox CPU hogging bug occurs only during heavy use of Firefox, with many Windows and tabs open for several hours, such as happens when someone in purchasing in a corporate environment is researching computer parts. The problem is made worse if the computer is hibernated or put in standby.

        If you open a lot of windows and tabs in Firefox on a laptop, and put the laptop in and out of standby, you will eventually notice that the laptop fan is running all the time, even when there is no activity. That's the CPU bug, and it can potentially shorten the life of your laptop. The fan is often the laptop component that fails first.

        It is interesting to note that the latest version of Opera also exhibits CPU hogging, but much less frequently. However, using Opera is not as comfortable because of poor design decisions in Opera.

        See: Firefox is the most unstable program in common use. [slashdot.org]

        Firefox developers apparently game the system by abusing those who report bugs: Mozilla Foundation Top 20 Excuses for Not Fixing Firefox Bugs [slashdot.org].

        Firefox development sometimes resembles playing. [slashdot.org]

        Basically, this seems to be the underlying problem: Winifred Mitchell Baker [wikipedia.org], the CEO [mozilla.com] of Mozilla, is a socially uncomfortable lawyer who became CEO when no one thought there was an opportunity. Now Mozilla Foundation is making millions from designating Google as the default search engine.

        Winifred has insufficient control over those who work for her, because she doesn't understand what they do. The Firefox CPU hogging and memory gobbling bug would take some serious troubleshooting to find, and no one wants to do the work, apparently.
      • MOD PARENT UP.

        See this +5 comment posted below: Firefox's problem is architectural and not one of garbage collection. [slashdot.org].

        Quote: Actually I'm pretty sure they're in denial as to the cause of their problems. Announcing they're working on fixing "memory leaks" just supports their ability to continue their delusion. [my emphasis]

        A +4 comment to that comment discusses Firefox's "four separate memory allocation schemes":

        "1. Custom malloc/free implementation. (Yes, custom - not from libc.)
        2. C++ new/delete operators, which for all I know may be overridden to use their malloc/free.
        3. One of the first two with reference counting to decide when to free/delete.
        4. JavaScript mark-and-sweep GC.

        Dealing with this causes some truly insane hacks..."


        Then read the comment they don't want you to see: The memory bug is also a CPU hogging bug. [slashdot.org] At present, it is marked -1 Flamebait. However, that comment begins to discuss apparent social problems at the Mozilla Foundation, and some of the same material has been marked +5 in the past.
  • Bloat in general (Score:5, Insightful)

    by pipatron (966506) <pipatron@gmail.com> on Monday September 24 2007, @11:32AM (#20730385) Homepage
    I don't mind the memory. I have plenty of gigs even in my laptop. What I mind is the general slowness that I experience with Firefox, and that makes me use Opera on my laptop even though I would feel better using an open source browser.
  • but but (Score:5, Interesting)

    by svendsen (1029716) on Monday September 24 2007, @11:33AM (#20730399)
    everytime I mentioned the memory issue I was always told it was a plugin or there was something wrong with my system or something about my mother and a donkey. Certainly firefox fan boys wouldn't have just attacked me because I questioned something...would they? :-D
    • Re:but but (Score:5, Interesting)

      by MBCook (132727) <foobarsoft@foobarsoft.com> on Monday September 24 2007, @11:48AM (#20730659) Homepage

      I've heard that too. I use FF on my desktop at work with one or two plugins (FlashBlock and FireBug, mostly). It does leak memory after enough time. Closing the browser always fixes it, so it's not much of a problem.

      That said, if a plugin leaks memory, there are a few options. First, the system should know. Even if the plugin in used constantly, I should be able to open the extensions options panel and see how much memory each one is using, so I can identify the culprit. There should be a warning system ("Plug-in 'MemHog2' is using 500MB of ram, close/ignore/disable?").

      Also, when a plugin isn't in use, then it shouldn't cause a problem. Let's say that the problem is Flashblock. If it isn't actively rendering (say I only have one window/tab open and it's pure text, no flash/etc) then it really shouldn't be using any memory. If I have FireBug inactive it should use next to no memory (when I have it actively checked CSS/JS/etc I expect it to use memory).

      I'm glad they are working on this. I've heard this complaint for a while. But even if the problem is the plugins, it needs fixing or roping in.

      How about being able to set memory limits for plug-ins, Mac OS 1-9.x style? Maybe total, maybe per active page, maybe both. Just a random idea.

  • by realdodgeman (1113225) on Monday September 24 2007, @11:33AM (#20730407) Homepage

    Here's hoping. Frequent restarts of things on my computer make me furious. I can't imagine why anyone would tolerate such things.


    Nobody forces you to use Firefox. You can use Opera, Konqueror, links or IE, or any other browser out there...
    • by suv4x4 (956391) on Monday September 24 2007, @11:58AM (#20730833)
      Nobody forces you to use Firefox. You can use Opera, Konqueror, links or IE, or any other browser out there...

      Firefox was supposed to be able to withstand popularity, unlike IE. Look at it now: people say it's slow, RAM hog, and hackers have started attacking it successfully just as much as IE.

      At least we see it for what it is: the stick in Microsoft's eye that made them resume IE development.

    • Nobody forces you to use Firefox. You can use Opera, Konqueror, links or IE, or any other browser out there...

      Maybe not, but in the Windows World, Opera is not a viable alternative to many people who find the Opera UI to be excessively daunting for casual use.

      The thing that has irritated me about this is that for a very long time, the FireFox leadership has insisted that there where no memory issues, that it was a specific type of use profile, and that if you knew the secrets of how to tweek the configurat

  • by wwmedia (950346) on Monday September 24 2007, @11:34AM (#20730411)
    too little too late some people i know have switched to alternatives like Opera or back to IE7 (both use substantially less resources on windows) due to all that ram hogging
  • by Gertlex (722812) on Monday September 24 2007, @11:36AM (#20730455)

    Here's hoping. Frequent restarts of things on my computer make me furious. I can't imagine why anyone would tolerate such things.

    I tolerate it with an extension that provides a restart button on the toolbar. There are several such extensions. It's also useful for when one wants to quickly restart after installing/enabling/disabling an add-on/theme.

    And of course, said extensions reload Firefox with the windows/tabs you had open.
  • by mgkimsal2 (200677) on Monday September 24 2007, @11:39AM (#20730499) Homepage
    I can't imagine why anyone would tolerate such things.

    Well, my guess is that you *are* tolerating it, as are millions of others, simply because you're using it (either older versions of IE, or current versions of Firefox). Can't comment on IE7 cause I don't use it much, but IE6 rarely crashed for me. IE3-5.5, almost daily crashes.

    5 years ago people people would constantly belittle IE users because it had frequent crashes, and pointed to the 'superior' Mozilla suite. Today, FF has morphed in to something which can't be used, with plugins, for more than a couple days max without needing to be reset. I add the caveat in there about 'with plugins' because I'm not sure I know many people who run a bare-metal Firefox. Most people use one or more extensions. This has been a huge marketing push for FF - "It's lean! Only use what you need! Get rid of 'bloat' - package everything in extensions!"

    Putting things in extensions makes the base 'leaner' but has lead to a situation where there's no centralized testing for, or even acknowledgement of, memory leak bugs (and other bugs, but this is the obvious one). I still read comments from people who claim they never have leaks with FF (we'll see some on this thread no doubt). It's not that I don't believe them, but their usage patterns are likely different from mine. I have about 6 plugins that I love to use, and I like to keep my browser going. The idea that MSIE is more "stable" than FF for daily usage should remind people that resting on your laurels is not an option. What cut the mustard 5 years ago isn't gonna cut it any more.

    • Reality check (Score:4, Insightful)

      by MMC Monster (602931) on Monday September 24 2007, @11:53AM (#20730741)

      I can't imagine why anyone would tolerate such things.
      5 years ago people people would constantly belittle IE users because it had frequent crashes, and pointed to the 'superior' Mozilla suite. Today, FF has morphed in to something which can't be used, with plugins, for more than a couple days max without needing to be reset.
      Reality check: Most general users do not leave their browsers open for a couple days. Let alone a couple days max. In fact, I wager that most turn their computers off at the end of the day.

      No I don't have a source for my statement. But ask people you know who are not in the tech industry. The one outlier group is Mac users, who don't realize that closing a browser window doesn't take the program out of memory.
    • by jsebrech (525647) on Monday September 24 2007, @12:29PM (#20731349)
      Today, FF has morphed in to something which can't be used, with plugins, for more than a couple days max without needing to be reset.

      You say that, and you compare it to IE. The only environment where I know people keep a firefox process open for days is on the mac, which doesn't run IE anymore (and btw, safari 2 leaks like a sieve too in my experience). Yes, I have to relaunch ff on my mac every few days. But on windows every time I close my last window, the browser shuts down and all memory is reclaimed. So, on platforms that are not mac, and for "normal" use patterns (i.e. don't leave a browser window with sites open for days), this is a non-issue.

      Thiis page may be informative about the issue of memory in firefox: http://plugindoc.mozdev.org/faqs/memusage.html [mozdev.org]
  • An act of balance (Score:5, Insightful)

    by SplatMan_DK (1035528) * on Monday September 24 2007, @11:49AM (#20730667) Homepage Journal
    I can certainly understand why people are tired of FF memory leaks. Being a FF user myself, with open browser windows and multiple tabs all through the day, I have seen what happens to FF after 4-5 hours of intense browsing. And don't even get me started on the PDF and Flash plugins!

    Some would argue that the problem is sloppy coding, or poor encapsulation (a typical OO programmers point of view). But please remember, that even though modern browsers are GUI apps, they are coded much like low-level server processes or protocol stacks. Low-level programming using languages like C and C++ gives you more control and better performance, but at the expense of nicer development features like garbage collection and encapsulation.

    Think about it. Would you accept a browser that rendered HTML flawlessly and with absolutely no memory leaks, but took more than a minute to render each page? I think not.

    It's an act of balance, and the problem is not _always_ "sloppy coding". It is the increasing complexity of these apps, combined with user demands which push the development towards low-level development languages. From a realistic point of view, any app. written in low-level C with as many lines of codes as FF, is bound to have bugs and leaks. (perhaps except code controlling nuclear reactors and NASA satellites, but then the price of each line of code is also somewhat different).

    We - the end users - are not without blame.

    - Jesper
  • by wizman (116087) on Monday September 24 2007, @12:16PM (#20731141)
    I use Firefox on Mac (intel) and Windows, with the latest versions on both. I can have Firefox open for a full week on Windows without any problems, however on either Mac I have to restart Firefox about once every day or two, otherwise browsing slows to a crawl. At extremes the whole machine will start to bog down until I "force quit" (kill -9) Firefox. I'll also experience oddness where images will just stop loading.

    Running "bare bones" on all Firefox installs, no plugins other than whatever may have been included with the base distribution.

    Does anyone else notice this? I've switched back to Safari on the Mac in the meantime.
  • by Alien Being (18488) on Monday September 24 2007, @12:37PM (#20731447)
    The biggest memory leak does not show up in firefox itself. It shows up in the X process:

                TIME+ PID USER CODE VIRT SWAP RES SHR S %CPU %MEM P COMMAND
          391:42.00 30262 root 1712 864m 481m 383m 5636 R 20.5 38.0 0 X :0 -auth /home/me/.serverauth.30245
            19:54.97 5473 me 9.9m 350m 202m 148m 18m S 0.0 14.7 0 firefox/firefox-bin

    xrestop shows this:

          res-base Wins GCs Fnts Pxms Misc Pxm mem Other Total PID Identifier

          3600000 295 62 1 2664 119 621592K 12K 621604K ? Firefox Working to Fix Memory Leaks - Mozilla Firefox

    In other words, X has over 600MB of memory holding pixmaps for firefox. This grows every time I open a page/tab with images in it.

    Closing pages/tabs does not free the memory from X, nor does lowering firefox's various cache settings in the preferences dialog and about:config. Quiting firefox causes X to release the memory. I have to do this at least once a week.

    • Re:Symmetry (Score:5, Funny)

      by Zelos (1050172) on Monday September 24 2007, @11:37AM (#20730465)
      No, and there are no bugs that can't be prevented by writing perfect, correct code.

      I think the problem's in the details...
    • Re: (Score:3, Informative)

      by Anonymous Coward
      LOL, maybe if you're working in a purely functional programming language :P if that were really the case, you could allocate everything on the stack. In practice, it's often necessary to keep stuff around in dynamically allocated memory between function calls, which is why we have the heap.
    • Re:Symmetry (Score:5, Funny)

      by ucblockhead (63650) on Monday September 24 2007, @11:42AM (#20730555) Homepage Journal
      Well, yeah. And you could prevent any memory leaks at all by requiring that malloc never be used and that everything be placed in static memory.

      Kinda hard to code like that, though.
    • Re: (Score:3, Informative)

      Are there really any memory problems that cannot be cured by strict adherance to the rule of "allocate memory at the beginging of a routine, deallocate same amount at the end"?

      This would be better states as: "allocate memory when needed and dellocate when no longer required" - memory allocations/dellocations do not always occur in the same routine, and this only gets worse in OO programming. However, garbage-collection does not resolve the issue either. The real answer is smart design and smart

    • by Selfbain (624722) on Monday September 24 2007, @11:37AM (#20730473)
      Ok. [flickr.com]
    • Re:And on three... (Score:5, Interesting)

      by Seumas (6865) on Monday September 24 2007, @11:41AM (#20730525)
      Actually, from what I understood over the last year "THERE IS NO MEMORY PROBLEM".

      Every time someone mentions memory issues, the responses are either that it's supposed to consume a gigabyte of ram so that it speeds up the back button or that "there is no memory issue".

      Strange, now, that there are suddenly people paying attention to specifically attacking memory use issues that supposedly don't exist.
    • Re:Here we go... (Score:5, Insightful)

      by savuporo (658486) on Monday September 24 2007, @11:39AM (#20730501)
      There are very few "things that require a lot of memory", really. Most of the "things" you do in programming are tradeoffs, often between complexity of implementation, speed and memory requirements. There are usually off the shelf algorithms for each approach. Simplest solutions are often the most inefficient ones.
      There is no reason why a minimal web browser could not be implemented, utilizing something like ~100kb of memory, in fact, i have seen the code to one. However, it wont be a) fast b) portable c) full featured d) very easy to understand
    • Re: (Score:3, Informative)

      How is it that an open source project is taking this long to fix bugs such as this?
      Because knowing the symptoms is not the same as knowing how to fix the problem?

      Observing the existence of a memory leak, and knowing where to fix it in your code, are two VERY different things.

      - Jesper