This package makes random passwords with fast logic described in this link.
The original logic is NOT goroutine safe because it shares rand.Source and the Int63() calls conflict. The logic in this package is using sync.Mutex to solve this.
package main
import (
"fmt"
"github.com/delphinus/random-string"
)
func main() {
pass := randomString.Generate(8);
fmt.Printf("simple password: %s\n", pass)
// simple password: JEVGqkiW
}go version
go version go1.8.1 darwin/amd64
go test -bench . -benchmem
BenchmarkRandomString/Runes-8 50000 35584 ns/op 1312 B/op 2 allocs/op
BenchmarkRandomString/Bytes-8 50000 35547 ns/op 512 B/op 2 allocs/op
BenchmarkRandomString/Remainder-8 50000 34095 ns/op 512 B/op 2 allocs/op
BenchmarkRandomString/Mask-8 50000 35362 ns/op 512 B/op 2 allocs/op
BenchmarkRandomString/MaskImproved-8 300000 4710 ns/op 512 B/op 2 allocs/op
BenchmarkRandomString/MaskSource-8 500000 3873 ns/op 512 B/op 2 allocs/op
PASS
ok github.com/delphinus/random-string 11.885s