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Fix unmounting performance regression in __DEV__ #7463

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merged 3 commits into from Aug 10, 2016
Merged

Fix unmounting performance regression in __DEV__ #7463

merged 3 commits into from Aug 10, 2016

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gaearon
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@gaearon gaearon commented Aug 10, 2016 •
edited

This is the same issue as was previously fixed by #7232, but in __DEV__.
Test plan:

  1. Grab https://github.com/gaearon/js-framework-benchmark/tree/master/react-v15.3.0
  2. npm run build-dev
  3. Mount 10K nodes, then “clear”

Before this change: ~6 seconds.
After this change: ~2 seconds.

This seems only relevant for Chrome.

@gaearon gaearon changed the title Fix unmounting performance regression in __DEV__ (WIP) Fix unmounting performance regression in __DEV__ Aug 10, 2016
@ghost ghost added the CLA Signed label Aug 10, 2016
@gaearon gaearon changed the title (WIP) Fix unmounting performance regression in __DEV__ Fix unmounting performance regression in __DEV__ Aug 10, 2016
@ghost ghost added the CLA Signed label Aug 10, 2016
@vjeux
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vjeux commented Aug 10, 2016

Quickly skimmed over it, nothing looks crazy. Stamping to unblock

@gaearon gaearon merged commit afa27bc into facebook:master Aug 10, 2016
@gaearon gaearon deleted the perf-regressions branch August 10, 2016 19:15
@gaearon gaearon added this to the 15-next milestone Aug 10, 2016
@sophiebits
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Was the try/catch difference noticeable?

@gaearon
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gaearon commented Aug 11, 2016

Not very much but it got emitEvent down from 18% to 14% in my testing.

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gaearon commented Aug 11, 2016

I'm curious if just having a single handler in hooks and passing the name as an argument could be faster to avoid dynamic checks and lookups.

@sophiebits
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That's actually a very big difference! How much do those numbers vary from run to run?

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gaearon commented Aug 11, 2016

To be honest I don’t remember about this particular commit (I’ve been testing many different ways, and some were more flaky than others). I can re-test it again in isolation later if you’d like.

@zpao zpao modified the milestones: 15.3.1, 15-next Aug 12, 2016
zpao pushed a commit that referenced this pull request Aug 12, 2016
@gaearon @zpao
Fix unmounting performance regression in __DEV__ (#7463)
5dce7c2 
* Comment previous occurrences of this issue

* Fix DEV performance regression in V8

* Extract try/catch into a separate function when calling hooks

(cherry picked from commit afa27bc)
@gaearon gaearon mentioned this pull request Aug 13, 2016
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gaearon commented Aug 13, 2016

@zpao This needs an additional fix in #7490

gaearon added a commit that referenced this pull request Aug 13, 2016
@gaearon
Fix ReactComponentTreeHook.getRegisteredIDs() to work with inlined co…
a738864 
…ntent (#7490)

I broke this in #7463: parseInt() cuts off #text at the end.
Changing to just use negative numbers instead.
zpao pushed a commit that referenced this pull request Aug 15, 2016
@gaearon @zpao
Fix ReactComponentTreeHook.getRegisteredIDs() to work with inlined co…
ce24114 
…ntent (#7490)

I broke this in #7463: parseInt() cuts off #text at the end.
Changing to just use negative numbers instead.
(cherry picked from commit a738864)
@renovate renovate bot mentioned this pull request Feb 2, 2018
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@gaearon @vjeux @sophiebits @zpao