[Bug 75] 4x performance regression of to!(char[]) from gcd 4.6 to 4.8

[gdc-bugzilla at gdcproject.org]

http://bugzilla.gdcproject.org/show_bug.cgi?id=75

--- Comment #2 from Iain Buclaw <ibuclaw at gdcproject.org> 2013-08-21 12:49:58 UTC ---
(In reply to comment #1)
> This has probably little to do with GDC itself, but is related to changes in
> std.conv module. I could measure it only with gdc, hence I reported it here.

Thanks for your bug report, there are some performance improvements to to!conv
in the pipeline for 2.064, would be interesting to get test results then.

Also, can you compile the code with -fdump-tree-original for both 4.6 and 4.8
and attach the produced dumps to this report? 

As well as changes to library code, should also show if there's any changes to
compiler code generation that may affect performance.

Thanks
Iain.

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