[Webkit-unassigned] [Bug 155551] Pathological performance on first execution of a function called with mismatched argument count
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Wed Mar 16 12:50:47 PDT 2016
https://bugs.webkit.org/show_bug.cgi?id=155551
--- Comment #4 from Oliver Hunt <oliver at apple.com> ---
Here's the case that originally struct me as wrong:
function f(j) { for (var i = 0 ; i < 10000000; i++) j = (j ? j * i : 1) ^ (i & j); };
var start = new Date; f(); var end = new Date; print("2nd: " + (end - start) + "ms");
var start = new Date; f(); var end = new Date; print("3rd: " + (end - start) + "ms");
First run is 433ms, second run is 137ms.
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