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hack: on IE 11, the Math.imul polyfill is a bottleneck for VP8/VP9 decoding in . Replacing it with direct multiplication results in a noticeable speedup, but assumes no overflows will happen and breaks asm.js validation. ;)

Of course users will get far bigger performance gains from using Edge or Firefox or Chrome or Safari or anything other than IE 11. ;)

mastodon.technology/media/4SBn

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