[Issue 10866] Regression (2.064 git-head) Massive compiler slowdown

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http://d.puremagic.com/issues/show_bug.cgi?id=10866



--- Comment #12 from bearophile_hugs at eml.cc 2013-09-12 14:35:40 PDT ---
(In reply to comment #11)
> As I've commented in
> https://github.com/D-Programming-Language/dmd/pull/2550#issuecomment-24353784,
> this is a Phobos issue, not a compiler one. I'm copying that comment here
> verbatim:
> 
> I've reduced it to a Phobos commit:
> 
> ---
> 9a053d97c26d763718b23d14af8ef1d10d594507 is the first bad commit
> commit 9a053d97c26d763718b23d14af8ef1d10d594507
> Author: Dmitry Olshansky <dmitry.olsh at gmail.com>
> Date:   Sat Jul 20 22:30:10 2013 +0400
> 
>     new std.uni module

Perhaps it's only part of the std.uni module that causes such compilation
slowdown. So someone should try to find such parts, and then perhaps change the
Phobos code to speed up the compilation, or introduce some front-end
optimizations to deal more efficiently with those parts.

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