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simple optimization: don't bother calling "exists" (which calls the syscall

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"access").  Instead, just let the open call fail if the file doesn't exist.
This reduces the # syscalls executed.

llvm-svn: 29173
This commit is contained in:
Chris Lattner 2006-07-18 07:07:51 +00:00
parent c373ed8521
commit 4854a2a120
1 changed files with 0 additions and 3 deletions
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3
lib/System/Unix/MappedFile.inc
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@ -40,9 +40,6 @@ struct sys::MappedFileInfo {
};
void MappedFile::initialize() {
if (!path_.exists())
throw std::string("Can't open file: ") + path_.toString();
int mode = 0;
if (options_ & READ_ACCESS)
if (options_ & WRITE_ACCESS)