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Measured stat performance, io_uring not worth it 

Large directories are slow for different reasons.
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Přemysl Eric Janouch 2021-10-05 19:18:15 +02:00
parent e1b0831854
commit 0d10ae06e6
Signed by: p
GPG Key ID: A0420B94F92B9493
1 changed files with 2 additions and 3 deletions
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sdn.cpp
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@ -638,9 +638,8 @@ fun make_entry (const struct dirent *f) -> entry {
e.info.st_mode = DTTOIF (f->d_type);
auto &info = e.info;
// TODO: benchmark just readdir() vs. lstat(), also on dead mounts;
// it might make sense to stat asynchronously in threads
// http://lkml.iu.edu/hypermail//linux/kernel/0804.3/1616.html
// io_uring is only at most about 50% faster, though it might help with
// slowly statting devices, at a major complexity cost.
if (lstat (f->d_name, &info)) {
e.cols[entry::MODES] = apply_attrs ({ decode_type (info.st_mode),
L'?', L'?', L'?', L'?', L'?', L'?', L'?', L'?', L'?' }, 0);