Status: New
Owner: ----
New issue 3469 by alonza...@gmail.com: Math.fround slowness
http://code.google.com/p/v8/issues/detail?id=3469
The Massive benchmark has a test, box2d, that has a version using
Math.fround,
https://github.com/kripken/Massive/blob/master/box2d/box2d_f32_2.js
It slowed down from 6 to 82 seconds (for comparison, spidermonkey takes
around 3 seconds), which I bisected to
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r22434 | yang...@chromium.org | 2014-07-16 07:00:15 -0700 (Wed, 16 Jul
2014) | 7 lines
Ship ES6 Math functions.
R=rossb...@chromium.org
BUG=v8:2938
LOG=Y
Review URL: https://codereview.chromium.org/394833002
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Looks like Math.fround is no longer behind a flag, and now available on the
web. The benchmark checks for it, and if not present then it would polyfill
it. Now that v8 ships these functions, it looks like the implementation of
Math.fround is being used instead of the polyfill, and I guess the
benchmark is hitting some slowdown related to it.
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