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perf: only check timeout every 256 files (#1499)

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LOU Xun 2020-07-28 20:26:00 +00:00 committed by GitHub
parent b8359a860a
commit 3818f901d4
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1 changed files with 6 additions and 2 deletions
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8
src/context.rs
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@ -204,8 +204,12 @@ impl DirContents {
let mut extensions: HashSet<String> = HashSet::new();
fs::read_dir(base)?
.take_while(|_| SystemTime::now().duration_since(start).unwrap() < timeout)
.filter_map(Result::ok)
.enumerate()
.take_while(|(n, _)| {
n & 0xFF != 0 // only check SystemTime once every 2^8 entries
|| SystemTime::now().duration_since(start).unwrap() < timeout
})
.filter_map(|(_, entry)| entry.ok())
.for_each(|entry| {
let path = PathBuf::from(entry.path().strip_prefix(base).unwrap());
if entry.path().is_dir() {