Comment #26 on issue 2935 by [email protected]: Poor performance in Ember app Discourse
https://code.google.com/p/v8/issues/detail?id=2935

Yup, thank to Ulan, I have been doing some experiments to remove some of these problem spots but while maintaining backwards compatibility.

We will work on improving ember's side of things. Unfortunately a large amount of the excess map allocations are do to our malleable object model. I believe we can make improvements, but likely won't be able to remove these problematic areas entirely without breaking semver (and causing much community pain). I would like to push for reducing the flexibility of our object model anyways, good perf #'s will hopefully compensate future upgrade pains.

As I make progress I'll report back here. :)

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