Status: New
Owner: ----
New issue 2639 by [email protected]: List is more inefficient than
std::vector. Can't push work from Blink to V8 without regressing
performance.
http://code.google.com/p/v8/issues/detail?id=2639
See this test:
https://codereview.chromium.org/13933026
Results (when the test is ran in the release mode for ia32).
std: 955 microseconds
list: 1741 microseconds
-> std::vector gets the stuff done in 55% of the time List needs.
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This is blocking the Handlepocalypse!
We need to make the GC related APIs (AddObjectGroup, AddImplicitReferences)
so that the embedder doesn't need to copy Persistent handles. For this, we
need to push bookkeeping work (forming the object groups based on "color"
of each object etc.) from Blink (V8GCController) to V8 (GlobalHandles).
We cannot do this without regressing performance if V8 doesn't have equally
efficient data structures than Blink does.
See also https://codereview.chromium.org/13975005/ for perf results of the
GC tests.
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