205366 2019-12-17 16:43:04 -0800 [JSC] Memory usage statistics should be attainable without WebCore 2019-12-20 16:06:25 -0800 1 1 1 Unclassified WebKit JavaScriptCore WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 ross.kirsling ross.kirsling commit-queue ews-watchlist keith_miller mark.lam msaboff saam tzagallo webkit-bug-importer ysuzuki oldest_to_newest 1599627 0 ross.kirsling 2019-12-17 16:43:04 -0800 PerformanceLogging::memoryUsageStatistics puts together some very useful information, most of which comes from vm.heap and not from WebCore itself: https://github.com/WebKit/webkit/blob/master/Source/WebCore/page/PerformanceLogging.cpp#L54-L76 As such it would be nice to have this information available in a JSC-only context. There are two possible approaches I can see: 1. Add methods to $vm. $vm.globalObjectCount() already exists so we could just add a few more. 2. Add a private C API (say, JSMemoryUsageStatistics under JSBasePrivate.h) which builds a JS object of this information much like the WebCore version. 1599959 1 386000 ross.kirsling 2019-12-18 13:24:48 -0800 Created attachment 386000 Patch 1599962 2 ross.kirsling 2019-12-18 13:26:47 -0800 Here's a patch for the private API approach. If we feel this is useful enough to warrant a public API (and we're clear on how we'd want the ObjC version to be), I'd be happy to change it accordingly. 1600831 3 386000 keith_miller 2019-12-20 11:22:53 -0800 Comment on attachment 386000 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=386000&action=review > Source/JavaScriptCore/API/JSBasePrivate.h:54 > +@result An object containing data such as heap size, heap capacity, and object counts. Can you put an @discussion that describes each of the properties on the returned object. 1600992 4 386271 ross.kirsling 2019-12-20 15:47:59 -0800 Created attachment 386271 Patch for landing 1600999 5 386271 commit-queue 2019-12-20 16:05:53 -0800 Comment on attachment 386271 Patch for landing Clearing flags on attachment: 386271 Committed r253854: <https://trac.webkit.org/changeset/253854> 1601000 6 commit-queue 2019-12-20 16:05:55 -0800 All reviewed patches have been landed. Closing bug. 1601002 7 webkit-bug-importer 2019-12-20 16:06:25 -0800 <rdar://problem/58128443> 386000 2019-12-18 13:24:48 -0800 2019-12-20 15:47:57 -0800 Patch bug-205366-20191218132448.patch text/plain 3586 ross.kirsling U3VidmVyc2lvbiBSZXZpc2lvbjogMjUzNjkyCmRpZmYgLS1naXQgYS9Tb3VyY2UvSmF2YVNjcmlw dENvcmUvQ2hhbmdlTG9nIGIvU291cmNlL0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwppbmRleCA1 ZTA5NTY0ZjcwYmZmMDYyODFmODQzZDU0OWEwZGI3YzNhYzNkYmRlLi40NTUyNzUyYjZlZWZjYzZi YWFlY2Q1MmU1MWY2ZmIyNzlhYjMxZjY0IDEwMDY0NAotLS0gYS9Tb3VyY2UvSmF2YVNjcmlwdENv cmUvQ2hhbmdlTG9nCisrKyBiL1NvdXJjZS9KYXZhU2NyaXB0Q29yZS9DaGFuZ2VMb2cKQEAgLTEs MyArMSwxNCBAQAorMjAxOS0xMi0xOCAgUm9zcyBLaXJzbGluZyAgPHJvc3Mua2lyc2xpbmdAc29u eS5jb20+CisKKyAgICAgICAgW0pTQ10gTWVtb3J5IHVzYWdlIHN0YXRpc3RpY3Mgc2hvdWxkIGJl IGF0dGFpbmFibGUgd2l0aG91dCBXZWJDb3JlCisgICAgICAgIGh0dHBzOi8vYnVncy53ZWJraXQu b3JnL3Nob3dfYnVnLmNnaT9pZD0yMDUzNjYKKworICAgICAgICBSZXZpZXdlZCBieSBOT0JPRFkg KE9PUFMhKS4KKworICAgICAgICAqIEFQSS9KU0Jhc2UuY3BwOgorICAgICAgICAoSlNHZXRNZW1v 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