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I think it still matters but I believe the JITs have made function calls considerably zippier.

Erik Reppen
– Erik Reppen

2012-04-02 19:43:42 +00:00
Commented Apr 2, 2012 at 19:43
Me too =) Especially after that, I sped up CPU-heavy JS code ~5 times with just inlining functions.

kirilloid
– kirilloid

2012-04-02 20:07:20 +00:00
Commented Apr 2, 2012 at 20:07
No matter what I try, forEach is always faster in Chrome.

trusktr
– trusktr

2015-12-02 01:06:50 +00:00
Commented Dec 2, 2015 at 1:06
Didn't know this 4 year ago but it's because modern JITs actually cache inline functions in the right circumstances. In old interpreters the buildup/teardown process of a function call made them undesirable in loops. Now they can actually be performance optimizing. It's probably best to avoid referencing anything that isn't defined in the function or passed to it as an argument.

Erik Reppen
– Erik Reppen

2016-04-05 17:53:51 +00:00
Commented Apr 5, 2016 at 17:53

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