Hi! This is an on going project that recently moved into a usable state. The objective is to let developers profile their website or apps to analyze their memory allocation characteristics. For example it could be used to find memory allocation hot spots that might give memory pressure to other apps on the system.
The profiler is designed at the very beginning to support not only JavaScript but also native codes. Naturally, not only JavaScript objects but also native allocations are tracked. It samples memory allocation based on accumulated allocation sizes so it could detect both rapid allocations and large allocations. Each allocation sampled has size and stack trace recorded so these sampled events can be used to approximate the full history of allocations afterwards. It also impose very low overhead on the system being profiled. Currently the gecko support has been landed on mozilla-central and enabled by default. The ability to sample native allocations is enabled when replace-malloc is enabled, which is default on Nightly. The user interface is developed as an devtools add-on. Once installed it could be accessed from developer toolbar or WebIDE. Here are instructions for installing and using the Memory Profiler add-on: https://developer.mozilla.org/en-US/docs/Mozilla/Performance/Memory_Profiler We also plan to work on a command line interface for scripting and custom post-processing. Here is the project page if you are interested and want to contribute: https://wiki.mozilla.org/MemoryProfiler Please try it out and file bugs in the "Core" product and "Gecko Profiler" component! We want this to be a useful tool for _you_! Cheers, Kanru _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
