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Performance/MemShrink

1,725 bytes removed, 05:34, 17 October 2014
Tools and Benchmarks
* [https://bugzilla.mozilla.org/buglist.cgi?list_id=1252950&resolution=---&resolution=DUPLICATE&emailtype1=regexp&status_whiteboard_type=allwordssubstr&emailassigned_to1=1&query_format=advanced&status_whiteboard=MemShrink&bug_status=UNCONFIRMED&bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&email1=nobody%40%7Cgeneral%40js.bugs Unassigned MemShrink bugs]. These need someone to work on them.
== Tools and Benchmarks ==
=== about:memory and memory reporters === about:memory is All the primary tool for understanding Firefox's memory consumption. It displays a large number of measurements tools that are made by numerous ''memory reporters'' implemented within Firefox. A basic guide we use to using about:memory is [[Performance/MemShrink/about:memory|here]]. Documentation on how to write a memory reporter is [[Memory_Reporting|here]]. === DMD === DMD is a tool that helps measure and improve the coverage of memory reporters. Documentation on using it is usage are described [[Performance/MemShrink/DMDTools|here]]. === areweslimyet.com === http://arewefastyet.com is a very successful site used to track the performance of Firefox's JavaScript engine. Why was arewefastyet.com so successful? Some key characteristics.* The benchmarks were easy to choose: everybody already used SunSpider and V8, and then Mozilla released [[Kraken]]. They run quickly, too, which is nice for devs, and allows expensive tools (like Cachegrind) to be used.* The metrics were easy to choose. SS time, V8 time, Kraken time. They can be measured easily, precisely, and fairly repeatably. You can break the total time down into per-benchmark times, which really helps with understanding improvements and regressions. They're easy for devs to run on their own machine.* There was a well-defined goal: match or beat the other browsers. In comparison, for memory consumption there is no good and/or standard benchmark suite; metrics are less clear and harder to measure (especially across different browsers); and most importantly, there's no well-defined goal w.r.t. any benchmarks. Nonetheless, we've created a memory benchmark and are tracking Firefox's performance on it over time, to provide a sense of MemShrink progress and detect regressions. It is available at http://areweslimyet.com/.
== Meeting Minutes, Progress Reports and Presentations ==
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