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Comment by firloop | Hacker News Reader

Wonder if that benchmark still holds true for Golang. Go 1.19 (released last week) includes jump table optimizations for switch statements.

https://go.dev/doc/go1.19#compiler

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I just tested it:

1.18:

    BenchmarkMap-10         13388006                77.38 ns/op
    BenchmarkSwitch-10      50482033                23.00 ns/op
    BenchmarkSlice-10       100000000               10.90 ns/op

1.19:

    BenchmarkMap-10         14947908                76.78 ns/op
    BenchmarkSwitch-10      49444435                23.01 ns/op
    BenchmarkSlice-10       100000000               10.74 ns/op

edit: If I understand the release notes correctly the switch optimisations are only new for large integers and strings.

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