Status: New
Owner: ----

New issue 3480 by [email protected]: V8 Array.join performance regression
http://code.google.com/p/v8/issues/detail?id=3480

In Chrome 37 arr.join(",") works 10-15 times faster than arr.join(",")

The same time performance of arr.join("xy") is almost the same as arr.join(",")

In Chrome 38 performance of arr.join("xy") degraded - is it the same as arr.join(" ")

When I commented _FastAsciiArrayJoin invocation in ArrayJoin and Join in array.js, then performance of all three cases is the same (low)

So, it looks that there is a bug and a regression.

Bug: " " separator breaks _FastAsciiArrayJoin (Chrome M37)
Regression: multiple-char strings break _FastAsciiArrayJoin in Chrome M38


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