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(parent: 5590514) | patch
Support: Improve performance of FileOutputBuffer on Windows
authorRui Ueyama <ruiu@google.com>
Fri, 6 Mar 2015 06:07:32 +0000 (06:07 +0000)
committerRui Ueyama <ruiu@google.com>
Fri, 6 Mar 2015 06:07:32 +0000 (06:07 +0000)
commitda9bc2e56d5a5c6332a9def1a0065eb399182b93
tree550f86fdbf7c2721e56555b73c9b219abf3477a5tree | snapshot
parent55905145e7cfe2adca541e7162b91d23a4e7f26ccommit | diff
Support: Improve performance of FileOutputBuffer on Windows

We extend an underlying file before mmap'ing it, but it's not needed
on Windows. Extending file is slow on Windows, so we should avoid doing that.
The difference gets larger as the size of an output file gets larger.
It shove off 2 seconds out of 25 seconds when linking chrome.dll with LLD,
for example.

llvm-svn: 231452
llvm/lib/Support/FileOutputBuffer.cpp diff | blob | history
Domain: System / Toolchain;