emberjs/ember.js — pull request #4310 by stefanpenner (2014-02-06 00:52:53+00:00)
Title: Don't deoptimize every Ember.run

TryCatchStatements are currently non-optimizable statements in v8 (and likely other run times). Additionally, methods containing try/catch statements are not inlineable

Although Ember.run's shouldn't be in a tight loop, we should incur the deopt penalty if we don't even use Ember.onerror