events: optimize listener array cloning #1050
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This both switches to a single algorithm for array cloning and also speeds up (by ~100% in the ee-listeners-many benchmark) the "many elements" case that was previously handled by `array.slice()`.
| return ret; | ||
| function arrayClone(arr, i) { | ||
| var copy = new Array(i); | ||
| while (i--) |
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Curious, is iterating backwards faster than forward?
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According to this jsperf and this jsperf it appears so, at least in this case.
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Yeah, it's really micro, but I also always do this when possible/sane, idk I guess I just like the way it looks. XD
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LGTM |
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+1, kill all the magic numbers. |
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LGTM |
mscdex
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Mar 5, 2015
This both switches to a single algorithm for array cloning and also speeds up (by ~100% in the ee-listeners-many benchmark) the "many elements" case that was previously handled by `array.slice()`. PR-URL: #1050 Reviewed-By: Ben Noordhuis <[email protected]> Reviewed-By: Julian Duque <[email protected]>
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Thanks, landed in 555a7c4. |
ChALkeR
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performance
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This both switches to a single algorithm for array cloning and also
speeds up (by ~100% in the ee-listeners-many benchmark) the
"many elements" case that was previously handled by
array.slice().