blocks|key|1512961|text|我认为来自软件验证有限公司的JavaScript+Memory+Validator可以帮助你，它有分配视图，对象视图，生成视图等。它不是免费的，但你可以使用评估版本来检查你同事的代码。它们也有一个性能和覆盖率验证器...|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1512962|entityMap|0|LINK|mutability|MUTABLE|url|http://www.softwareverify.com/javascript/memory/feature.html^0|E|R|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

I think <a href="http://www.softwareverify.com/javascript/memory/feature.html" rel="nofollow noreferrer">JavaScript Memory Validator</a> from Software Verification Limited can help you, it has allocations view, objects view, generations view, etc. It's not free but you can use the evaluation version to check your coworker's code. They also have a Performance and Coverage Validators...

blocks|key|1728129|text|参见the+source。稀疏数组不占用大量内存，但是如果您的同事不需要任何Array功能，那么无论如何他都应该使用普通的Object。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1728130|entityMap|0|LINK|mutability|MUTABLE|url|http://mxr.mozilla.org/mozilla-central/source/js/src/jsarray.cpp#41^0|12|5|1P|6|2|A|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]|$9|Q|A|R|B|C]]|D|@$9|S|A|T|1|U]]|E|$]]|$1|F|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

See <a href="http://mxr.mozilla.org/mozilla-central/source/js/src/jsarray.cpp#41" rel="noreferrer">the source</a>. Sparse arrays don't take up lots of memory, but if your colleague doesn't need any <code>Array</code> functionality, he should be using plain <code>Object</code>s anyway.

blocks|key|1513046|text|我还没有尝试过软件验证工具，但Mozilla有一些工具可以跟踪firefox消耗的总内存，以阻止泄漏：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1513047|http://www.mozilla.org/performance/tools.html|offset|length|1513048|和：|1513049|https://wiki.mozilla.org/Performance:Leak_Tools|1513050|还有一个人说，在闭包的上下文中避免使用大型数组，而不是文章底部|1513051|http://ajax.sys-con.com/node/352585|1513052|entityMap|0|LINK|mutability|MUTABLE|url|1|2^0|0|0|19|0|0|0|0|1B|1|0|0|0|Z|2|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@$D|Y|E|Z|1|10]]|A|$]]|$1|F|3|G|5|6|7|11|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|12|8|@]|9|@$D|13|E|14|1|15]]|A|$]]|$1|J|3|K|5|6|7|16|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|17|8|@]|9|@$D|18|E|19|1|1A]]|A|$]]|$1|N|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]]|O|$P|$5|Q|R|S|A|$T|C]]|U|$5|Q|R|S|A|$T|I]]|V|$5|Q|R|S|A|$T|M]]]]

I haven't tried the Sofware verify tools, but Mozilla has tools that track overall memory consumed by firefox for the purpose of stemming leaks:

<a href="http://www.mozilla.org/performance/tools.html" rel="noreferrer">http://www.mozilla.org/performance/tools.html</a>

and:

<a href="https://wiki.mozilla.org/Performance:Leak_Tools" rel="noreferrer">https://wiki.mozilla.org/Performance:Leak_Tools</a>

There's also this guy saying to avoid large arrays in the context of closures, towards article bottom

<a href="http://ajax.sys-con.com/node/352585" rel="noreferrer">http://ajax.sys-con.com/node/352585</a>

blocks|key|1728216|text|也可以试试about:memory，它显示了每个窗口占用了多少内存，其中有多少专用于JS对象。它给出了没有每个对象使用情况的高级摘要，但它是调查站点内存需求的一个很好的起点。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1728217|entityMap^0|5|C|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

Try also <code>about:memory</code> which shows how much memory each window occupies and how much of it is dedicated to JS objects. It gives high level summary without per object usage, but it is a good starting point for investigating memory requirements of a site.

blocks|key|1513131|text|您可以使用Mozilla的开发人员工具。为了使用Firefox的高级开发人员工具，您需要创建调试版本而不是发布版本。有关构建过程的更多信息，请参阅the+page。此外，有关使用Mozilla的开发人员工具的更多信息，您可以在此paper中找到。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1513132|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en-US/docs/Simple_Firefox_build#Building|1|http://injoit.org/index.php/j1/article/view/218/169^0|21|8|0|36|5|1|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]|$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]]]

You can use Mozilla’s Developer Tools. In order to use advanced developer tools of Firefox you need to create a debug build instead of a release build. For more on building process, see <a href="https://developer.mozilla.org/en-US/docs/Simple_Firefox_build#Building" rel="nofollow">the page</a>. Also, more information about using Mozilla’s Developer Tools you can find in this <a href="http://injoit.org/index.php/j1/article/view/218/169" rel="nofollow">paper</a>.

Is there a tool/plugin/function for Firefox that'll dump out a memory usage of Javascript objects that you create in a page/script? I know about Firebug's profiler but I'd like something more than just times. Something akin to what Yourkit has for Java profiling of memory usage.

Reason is that a co-worker is using id's for "keys" in an array and is creating 1000's of empty slots when he does this. He's of the opinion that this is harmless whereas my opinion differs. I'd like to offer some proof to prove whether I'm right or not.

Javascript memory profiler for Firefox

Java

有没有一个针对Firefox的工具/插件/函数可以将你在页面/脚本中创建的Javascript对象的内存使用情况转储出去？我知道Firebug的分析器，但我想要的不仅仅是时间。类似于您的工具包对内存使用情况进行Java分析的功能。原因是，一个同事在数组中使用id作为“键”，并且当他这样做时，正在创建1000个空槽。他认...

问用于Firefox的Javascript内存分析器
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