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On 9 Oct 2018, at 23:02, Gregory Szorc <gregory.szorc@gmail.com> wrote:

While we're here, CPython might want to look into getdirentriesattr() as
a replacement for readdir(). We switched to it in Mercurial several
years ago to make \`hg status\` operations significantly faster \[2\]. I'm
not sure if it will yield a speedup on APFS though. But it's worth a
try. (If it does, you could probably make
os.listdir()/os.scandir()/os.walk() significantly faster on macOS.)