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package main
import (
"encoding/hex"
"fmt"
"sort"
"testing"
"time"
"gitlab.com/rhogenson/roseh.moe/internal/pwhash"
)
func mustHex(t testing.TB, s string) []byte {
t.Helper()
b, err := hex.DecodeString(s)
if err != nil {
t.Fatalf("Invalid hex %q: %s", s, err)
}
return b
}
var iterations int
func BenchmarkHashIter(b *testing.B) {
const pw = "atypical evasion foyer roulette throng awning stability exchange humorless vowed"
salt := mustHex(b, "4250af599e07cde7")
for b.Loop() {
pwhash.HashIter(pw, salt, iterations)
}
}
func main() {
const targetDuration = 5 * time.Second
for iterations = 4096; time.Duration(testing.Benchmark(BenchmarkHashIter).NsPerOp()) < targetDuration; iterations *= 2 {
}
lo := iterations / 2
hi := iterations
fmt.Println(lo + sort.Search(hi-lo, func(i int) bool {
iterations = lo + i
return time.Duration(testing.Benchmark(BenchmarkHashIter).NsPerOp()) > targetDuration
}))
}
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