syncthing/lib/weakhash/benchmark_test.go
2017-02-09 08:04:16 +01:00

62 lines
1.1 KiB
Go

// Copyright (C) 2016 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.
package weakhash
import (
"os"
"testing"
"github.com/chmduquesne/rollinghash/adler32"
)
const testFile = "../model/testdata/~syncthing~file.tmp"
const size = 128 << 10
func BenchmarkFind1MFile(b *testing.B) {
b.ReportAllocs()
b.SetBytes(1 << 20)
for i := 0; i < b.N; i++ {
fd, err := os.Open(testFile)
if err != nil {
b.Fatal(err)
}
_, err = Find(fd, []uint32{0, 1, 2}, size)
if err != nil {
b.Fatal(err)
}
fd.Close()
}
}
func BenchmarkWeakHashAdler32(b *testing.B) {
data := make([]byte, size)
hf := adler32.New()
for i := 0; i < b.N; i++ {
hf.Write(data)
}
_ = hf.Sum32()
b.SetBytes(size)
}
func BenchmarkWeakHashAdler32Roll(b *testing.B) {
data := make([]byte, size)
hf := adler32.New()
hf.Write(data)
b.ResetTimer()
for i := 0; i < b.N; i++ {
for i := 0; i <= size; i++ {
hf.Roll('a')
}
}
b.SetBytes(size)
}