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Speed up getAccessibleFileSystemEntries - #36139
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Andrew Casey (amcasey) wants to merge 3 commits into
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While writing a benchmark, I happened to notice that (a) the natural win32 APIs for this task include "isDirectory" in the result and (b) readDirSync will return entries, rather than strings, if you pass withFileTypes. It turns out this version, which allows us to dispense with path math and stat calls is ~30X faster (enumerating a directory with 600 children).
Mine Starks (minestarks)
commented
Jan 11, 2020
Contributor
Struggling to find an emoji to express my joy |
Andrew Casey (amcasey)
commented
Jan 11, 2020
MemberAuthor
On Node 8 on Linux, the flag is ignored and strings are returned regardless. |
Andrew Casey (amcasey)
commented
Jan 11, 2020
MemberAuthor
Node 10 on Linux shows a ~5X improvement, so it's probably worth finding a way to special case Node 8 on Linux. |
Klaus Meinhardt (ajafff)
commented
Jan 11, 2020
Contributor
There's already a PR to use |
Andrew Casey (amcasey)
commented
Jan 13, 2020
MemberAuthor
Klaus Meinhardt (@ajafff) Thanks for the link! Closing in favor of #35286. |
TypeScript Bot (typescript-bot)
commented
Oct 21, 2025
Contributor
This PR doesn't have any linked issues. Please open an issue that references this PR. From there we can discuss and prioritise. |
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While writing a benchmark, I happened to notice that (a) the natural
win32 APIs for this task include "isDirectory" in the result and (b)
readDirSync will return entries, rather than strings, if you pass
withFileTypes. It turns out this version, which allows us to dispense
with path math and stat calls is ~20X faster (enumerating a directory
with 600 children).