Update: So extending this a bit. SpiderMonkey code...

2011-06-12T06:46:15.274-07:00

Update: So extending this a bit.
SpiderMonkey code is at http://hg.mozilla.org/tracemonkey.
To understand the naming and some internals, i recommend reading Mapping the monkeysphere by cdleary.

For TraceMonkey (our tracing JIT) getting the cases we don't optimize is kinda easy. Please notice that code we don't trace is fed into our Jägermonkey (the whole method JIT), so it's most of the time equally and often even faster.

>grep LeaveTrace *
When we trace into some function, that can't be traced, we stop tracing.
>grep RETURN_STOP jstracer.cpp
General operations that can't be traced.

Jägermonkey accepts nearly everything, only a few things like |with| aren't compiled.
But you can get a list of stuff we can't "inline cache" (again read this article by cdleary, when you don't know what this is)
>grep disable methodjit/*

@Erik: Sorry, yeah. Typo corrected.

2011-06-12T06:21:41.435-07:00

@Erik: Sorry, yeah. Typo corrected.

It's Mr Aleph rather than Mr Raleph. See http...

2011-06-12T06:19:57.633-07:00

It's Mr Aleph rather than Mr Raleph. See http://en.wikipedia.org/wiki/Aleph I guess.

2011-06-12T06:02:10.467-07:00

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Comments on NonBlocking.io - Malte Ubl's Asynchronous Identity Disorder: Triggering de-optimized execution in modern JavaSc...

Update: So extending this a bit. SpiderMonkey code...

@Erik: Sorry, yeah. Typo corrected.

It's Mr Aleph rather than Mr Raleph. See http...