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package main
import (
"encoding/hex"
"fmt"
"sort"
"testing"
"time"
"roseh.moe/pkg/roseh.moe/internal/pwhash"
)
func mustHex(s string) []byte {
b, err := hex.DecodeString(s)
if err != nil {
panic(err)
}
return b
}
var salt = mustHex("34539b5dd2591415")
var iter int
func BenchmarkHashIter(b *testing.B) {
const password = "wavy upend 4z jk linda k zing four atop pi"
for b.Loop() {
pwhash.HashIter(password, salt, iter)
}
}
func main() {
const targetTime = 5 * time.Second
for iter = 8192; time.Duration(testing.Benchmark(BenchmarkHashIter).NsPerOp()) < targetTime; iter *= 2 {
}
lo := iter / 2
hi := iter
fmt.Println(lo + sort.Search(hi-lo, func(n int) bool {
iter = lo + n
return time.Duration(testing.Benchmark(BenchmarkHashIter).NsPerOp()) > targetTime
}))
}
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