[Issue 7442] ctRegex!`\p{Letter}` uses a lot memory in compilation

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=7442


Don <clugdbug at yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|CTFE                        |
                 CC|                            |clugdbug at yahoo.com.au
          Component|DMD                         |Phobos


--- Comment #3 from Don <clugdbug at yahoo.com.au> 2012-04-11 01:06:51 PDT ---
This is slow because the code makes 15000 concatenations (and I didn't check
what else it does, there may be other performance issues). That would be poor
performance even in runtime code.
The memory usage is exacerbated by CTFE bug 1382 and bug 6498, but basically
this is a Phobos bug.

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