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Kir Kolyshkin
d0c3bc44e7
filepath.WalkDir function, introduced in Go 1.16, doesn't do stat(2)
on every entry, and is therefore somewhat faster (see below).
Since we have to support Go 1.15, keep the old version for backward
compatibility.
Add a quick benchmark, which shows approximately 3x improvement:
$ go1.15.15 test -bench AllPid -run xxx .
BenchmarkGetAllPids-4 48 23528839 ns/op
$ go version
go version go1.16.6 linux/amd64
$ go test -bench AllPid -run xxx .
BenchmarkGetAllPids-4 147 7700170 ns/op
(Unrelated but worth noting -- go 1.17rc2 is pushing it even further)
$ go1.17rc2 test -bench AllPid -run xxx .
BenchmarkGetAllPids-4 164 6820994 ns/op
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>