Yet another natural sort, with 100% test coverage and a benchmark. It allocates
no memory, doesn't depend on package sort and hence doesn't depend on reflect.
On Go 1.10.1.
On a Xeon:
$ go test -bench=. -benchmem -cpu 1
goos: linux
goarch: amd64
pkg: github.com/maruel/natural
BenchmarkNative 200000000 8.63 ns/op 0 B/op 0 allocs/op
BenchmarkLessStringOnly 100000000 18.7 ns/op 0 B/op 0 allocs/op
BenchmarkLessDigits 50000000 30.5 ns/op 0 B/op 0 allocs/op
BenchmarkLessStringDigits 50000000 31.3 ns/op 0 B/op 0 allocs/op
BenchmarkLessDigitsTwoGroups 20000000 64.4 ns/op 0 B/op 0 allocs/op
On a Raspberry Pi 3:
$ go test -bench=. -benchmem -cpu 1
goos: linux
goarch: arm
pkg: github.com/maruel/natural
BenchmarkNative 10000000 148 ns/op 0 B/op 0 allocs/op
BenchmarkLessStringOnly 5000000 312 ns/op 0 B/op 0 allocs/op
BenchmarkLessDigits 2000000 656 ns/op 0 B/op 0 allocs/op
BenchmarkLessStringDigits 2000000 679 ns/op 0 B/op 0 allocs/op
BenchmarkLessDigitsTwoGroups 1000000 1480 ns/op 0 B/op 0 allocs/op
Coverage:
$ go test -cover
PASS
coverage: 100.0% of statements
ok github.com/maruel/natural 0.012s
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