Status: Untriaged
Owner: ----

New issue 4150 by [email protected]: block scope variables are slow when not inside a block scope
https://code.google.com/p/v8/issues/detail?id=4150

Version: <Insert version or Git hash>
OS: Mac OS X 10.10
Architecture: <ARM, x64, etc.>

What steps will reproduce the problem?
http://jsperf.com/varvsletvsconst/2
vs
http://jsperf.com/varvsletvsconst/3

one perf is block scope variables declared inside a block, one outside. The results are quite surprising. the non-block scoped variables are incredibly slow compared to the block variables.


What is the expected output?
I expect them to all roughly be equivalent.

What do you see instead?


Please use labels and text to provide additional information.



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