[Webkit-unassigned] [Bug 139847] JavaScriptCore deeply nested "call" performance issue

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=139847

Chris <chris at chrismatic.io> changed:

           What    |Removed                     |Added
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                 CC|                            |chris at chrismatic.io

--- Comment #3 from Chris <chris at chrismatic.io> ---
I've been able to reproduce using run-jsc from the command line (OS X 10.10.2).

The "delay" happens BEFORE any of the functions ever gets to be called. To see this, you can modify the inc function:

inc = function(x) {
    debug(x);
    return x + 1;
};

The observed behavior is: long delay with NO OUTPUT (suggesting the function calls aren't actually 'happening'), then all output is emitted quickly as expected.

Tried using -p with jsc to get a profile, but jsc kept running and it started eating huge amounts of memory (> 16GBs just for the test case running with -p).

I'll investigate the issue some more.

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