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| author | Chris Lattner <sabre@nondot.org> | 2010-11-23 22:32:37 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2010-11-23 22:32:37 +0000 |
| commit | 5ea7d07d2ab204144f1f36c4673a17a122a514bc (patch) | |
| tree | 8a0b9f4fbd36e9420ca3d613c3f6c63c0c0cfd8a /clang/lib/Checker/BasicConstraintManager.cpp | |
| parent | 6bf4e6d8b20d25d9263d61d5f9ae1967806a0807 (diff) | |
| download | bcm5719-llvm-5ea7d07d2ab204144f1f36c4673a17a122a514bc.tar.gz bcm5719-llvm-5ea7d07d2ab204144f1f36c4673a17a122a514bc.zip | |
The final result of all this refactoring: instead of doing stat immediately
followed by an open for every source file we open, probe the file system with
'open' and then do an fstat when it succeeds. open+fstat is faster than
stat+open because the kernel only has to perform the string->inode mapping
once. Presumably it gets faster the deeper in your filesystem a lookup
happens.
For -Eonly on cocoa.h, this reduces system time from 0.042s to 0.039s on
my machine, a 7.7% speedup.
llvm-svn: 120066
Diffstat (limited to 'clang/lib/Checker/BasicConstraintManager.cpp')
0 files changed, 0 insertions, 0 deletions
