Speed up getAccessibleFileSystemEntries #36139
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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).
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Struggling to find an emoji to express my joy |
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On Node 8 on Linux, the flag is ignored and strings are returned regardless. |
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Node 10 on Linux shows a ~5X improvement, so it's probably worth finding a way to special case Node 8 on Linux. |
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There's already a PR to use |
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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).