Comment #3 on issue 4335 by [email protected]: large google maps
performance regression in chrome canary (version 46)
https://code.google.com/p/v8/issues/detail?id=4335
Google internal link for repro files: go/slow_object_repro
Run "d8 repro.js" (from the containing directory so it can find the data
files)
On my machine this test goes from about 9s to about 12s with the "Fix
non-standard element handling" change.
These keys are indeed large integers (they're pretty evenly distributed
31-bit ids, I think). But this particular limit has not changed, right? Why
the dramatic slowdown? I can't change the data (it's ids coming from the
server), but of course we can change our code. For example, I could create
two levels of object, using half the bits at each level. That's going to
generate more garbage, though, and more complex code.
Thanks for looking into this!
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