34805 2010-02-10 10:41:47 -0800 [V8] Perf regression in V8DOMWrapper::instantiateV8Object() 2010-02-12 10:30:02 -0800 1 1 1 Unclassified WebKit WebCore Misc. 528+ (Nightly build) PC OS X 10.5 RESOLVED FIXED P2 Normal --- 1 japhet japhet antonm oldest_to_newest 189412 0 japhet 2010-02-10 10:41:47 -0800 I introduced a performance regression in http://trac.webkit.org/changeset/54499. It can be fixed by providing a split similar to what had existed previously: one path for objects that might be constructed in a WorkerContext, and a fast path for objects that are never in a WorkerContext. 189422 1 48512 japhet 2010-02-10 11:24:23 -0800 Created attachment 48512 patch Performance on the DOM benchmark suite with this patch is comparable to a build with 54499 reverted, and dromaeo performance appears to be slightly better. 189428 2 antonm 2010-02-10 11:33:37 -0800 Thanks a lot, Nate. Only one thing---instantiate in worker context tells me that it must be a worker context, however it looks like it's possibly a worker context. If it's correct, could you give some other name. The ugly idea I have is in possible worker context. 189429 3 japhet 2010-02-10 11:37:49 -0800 (In reply to comment #2) > Thanks a lot, Nate. > > Only one thing---instantiate in worker context tells me that it must be a > worker context, however it looks like it's possibly a worker context. > > If it's correct, could you give some other name. The ugly idea I have is in > possible worker context. Yeah, I debated the name. Perhaps instantiateV8ObjectMaybeInWorkerContext? 189431 4 antonm 2010-02-10 11:38:59 -0800 (In reply to comment #3) > (In reply to comment #2) > > Thanks a lot, Nate. > > > > Only one thing---instantiate in worker context tells me that it must be a > > worker context, however it looks like it's possibly a worker context. > > > > If it's correct, could you give some other name. The ugly idea I have is in > > possible worker context. > > Yeah, I debated the name. Perhaps instantiateV8ObjectMaybeInWorkerContext? Yep, something like that. Thanks. 189715 5 48512 dglazkov 2010-02-11 09:34:33 -0800 Comment on attachment 48512 patch ok. I was so happy for this code to be gone. Oh well. 190096 6 japhet 2010-02-12 10:30:02 -0800 http://trac.webkit.org/changeset/54680 48512 2010-02-10 11:24:23 -0800 2010-02-11 09:34:33 -0800 patch patch.txt text/plain 7876 japhet SW5kZXg6IFdlYkNvcmUvQ2hhbmdlTG9nCj09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT0KLS0tIFdlYkNvcmUvQ2hhbmdlTG9n CShyZXZpc2lvbiA1NDYxMSkKKysrIFdlYkNvcmUvQ2hhbmdlTG9nCSh3b3JraW5nIGNvcHkpCkBA IC0xLDMgKzEsMTkgQEAKKzIwMTAtMDItMTAgIE5hdGUgQ2hhcGluICA8amFwaGV0QGNocm9taXVt Lm9yZz4KKworICAgICAgICBSZXZpZXdlZCBieSBOT0JPRFkgKE9PUFMhKS4KKworICAgICAgICBb VjhdIEFkZCBiYWNrIGluIGEgZmFzdCBwYXRoIGZvciB2OCBvYmplY3Qgd3JhcHBpbmcKKyAgICAg ICAgd2hlbiBpdCdzIG5vdCBwb3NzaWJsZSB3ZSdyZSBpbiBhIFdvcmtlckNvbnRleHQgKHRoZSBm YXN0CisgICAgICAgIHBhdGggaXMgaW1wb3J0YW50IGZvciBwZXJmb3JtYW5jZSkuCisKKyAgICAg ICAgaHR0cHM6Ly9idWdzLndlYmtpdC5vcmcvc2hvd19idWcuY2dpP2lkPTM0ODA1CisKKyAgICAg ICAgKiBiaW5kaW5ncy9zY3JpcHRzL0NvZGVHZW5lcmF0b3JWOC5wbToKKyAgICAgICAgKiBiaW5k 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