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fscache: use FindFirstFileExW to avoid retrieving the short name

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Use FindFirstFileExW with FindExInfoBasic to avoid forcing NTFS to look up
the short name.  Also switch to a larger (64K vs 4K) buffer using
FIND_FIRST_EX_LARGE_FETCH to minimize round trips to the kernel.

In a repo with ~200K files, this drops warm cache status times from 3.19
seconds to 2.67 seconds for a 16% savings.

Signed-off-by: Ben Peart <benpeart@microsoft.com>
This commit is contained in:
Ben Peart
2018-10-23 11:42:06 -04:00
committed by Johannes Schindelin
parent 5d6c7c99fd
commit ba27e635aa
1 changed files with 2 additions and 1 deletions
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3
compat/win32/fscache.c
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@@ -215,7 +215,8 @@ static struct fsentry *fsentry_create_list(const struct fsentry *dir,
pattern[wlen] = 0;
/* open find handle */
h = FindFirstFileW(pattern, &fdata);
h = FindFirstFileExW(pattern, FindExInfoBasic, &fdata, FindExSearchNameMatch,
NULL, FIND_FIRST_EX_LARGE_FETCH);
if (h == INVALID_HANDLE_VALUE) {
err = GetLastError();
*dir_not_found = 1; /* or empty directory */