Go f1980efb92c011eab71aa61b68ccf58d845d1de7 on a Mini on 11.0.1

    goos: darwin
    goarch: arm64
    pkg: sync
    BenchmarkCond2       4849542        249.7 ns/op
    BenchmarkCond2-2     2639139        531.1 ns/op
    BenchmarkCond2-4     3112030        393.1 ns/op