cdiggins/myna-parser

Possible performance degradation under Chrome Canary 61

bd82 opened this issue · 2 comments

bd82 commented

Looks like Myna only runs much slower on Chrome Canary 61
(which includes the new TurboFan V8 compiler and Ignition interpreter).

I don't know if this is a bug in Chrome that will be fixed by the time an official version of Chrome is released or if it is a a real issue.

Just an heads up...

Also Note:

  • Most other parsing libraries get a speed boost in Chrome Canary 61.
  • Screen shot (I get about 500 ops/Second on Chrome 58)
    capture
cdiggins commented

Thanks for letting me kno! Closing this issue, since there isn't much I can do about it now. I will be looking into the performance improvements suggested in #13 .

bd82 commented

You can reproduce it now on latest Chrome stable version (59).
There is a new JavaScript optimizing compiler there (Ignition + turbofan)

I guess the new V8 is much slower for some code patterns used in Myna.
But I have no idea what / which / why.

Perhaps you need to compare CPU profiling results on different Chrome versions to figure this out.

Sounds like a pain 😢