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sync bench
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package main | |
import ( | |
"crypto/rand" | |
"encoding/hex" | |
"io/ioutil" | |
"os" | |
"sync" | |
"testing" | |
) | |
// goos: linux | |
// goarch: amd64 | |
// BenchmarkSyncConcurrent/FILE_WITH_SYNC-16 1 1376064452 ns/op 9424 B/op 27 allocs/op | |
// BenchmarkSyncConcurrent/ONE_BATCH_SYNC-16 10 142692956 ns/op 720 B/op 12 allocs/op | |
// BenchmarkSyncConcurrent/TWO_BATCH_SERIAL_SYNC-16 5 214881655 ns/op 1424 B/op 23 allocs/op | |
// BenchmarkSyncConcurrent/TWO_BATCH_CONCURRENT_SYNC-16 10 146918995 ns/op 4964 B/op 31 allocs/op | |
// PASS | |
// ok _/home/schoolboy/sample 5.845s | |
// Success: Benchmarks passed. | |
func BenchmarkSyncConcurrent(b *testing.B) { | |
tempName := func() string { | |
name := make([]byte, 10) | |
rand.Read(name) | |
dir, _ := os.Getwd() | |
return dir + "/" + string(hex.EncodeToString(name)) + ".txt" | |
} | |
_ = func() (*os.File, *os.File) { | |
fp, err := ioutil.TempFile(os.TempDir(), "") | |
if err != nil { | |
panic(err) | |
} | |
fp2, err := ioutil.TempFile(os.TempDir(), "") | |
if err != nil { | |
panic(err) | |
} | |
data := make([]byte, 8) | |
rand.Read(data) | |
for i := 0; i < 1000; i++ { | |
fp.Write(data) | |
fp2.Write(data) | |
} | |
return fp, fp2 | |
} | |
// b.Run("FILE WITH SYNC", func(b *testing.B) { | |
// do := func() { | |
// fp, err := os.OpenFile(tempName(), os.O_CREATE|os.O_SYNC|os.O_RDWR, 0666) | |
// if err != nil { | |
// panic(err) | |
// } | |
// data := make([]byte, 8) | |
// rand.Read(data) | |
// for i := 0; i < 1000; i++ { | |
// fp.Write(data) | |
// } | |
// fp.Close() | |
// } | |
// b.ResetTimer() | |
// for i := 0; i < b.N; i++ { | |
// do() | |
// } | |
// }) | |
b.Run("ONE BATCH SYNC", func(b *testing.B) { | |
fp, err := os.OpenFile(tempName(), os.O_CREATE|os.O_RDWR, 0666) | |
if err != nil { | |
panic(err) | |
} | |
data := make([]byte, 8) | |
rand.Read(data) | |
b.ResetTimer() | |
for i := 0; i < b.N; i++ { | |
for i := 0; i < 1000; i++ { | |
fp.Write(data) | |
fp.Write(data) | |
if i%10 == 0 { | |
fp.Sync() | |
} | |
} | |
} | |
}) | |
// b.Run("TWO BATCH SERIAL SYNC", func(b *testing.B) { | |
// b.ResetTimer() | |
// for i := 0; i < b.N; i++ { | |
// fp, err := os.OpenFile(tempName(), os.O_CREATE|os.O_RDWR, 0666) | |
// if err != nil { | |
// panic(err) | |
// } | |
// fp2, err := os.OpenFile(tempName(), os.O_CREATE|os.O_RDWR, 0666) | |
// if err != nil { | |
// panic(err) | |
// } | |
// data := make([]byte, 8) | |
// rand.Read(data) | |
// for i := 0; i < 1000; i++ { | |
// fp.Write(data) | |
// fp2.Write(data) | |
// if i%10 == 0 { | |
// fp.Sync() | |
// fp2.Sync() | |
// } | |
// } | |
// fp.Close() | |
// fp2.Close() | |
// } | |
// }) | |
b.Run("TWO BATCH CONCURRENT SYNC", func(b *testing.B) { | |
var wg sync.WaitGroup | |
syncer := func(f *os.File) { | |
f.Sync() | |
wg.Done() | |
} | |
fp, err := os.OpenFile(tempName(), os.O_CREATE|os.O_RDWR, 0666) | |
if err != nil { | |
panic(err) | |
} | |
fp2, err := os.OpenFile(tempName(), os.O_CREATE|os.O_RDWR, 0666) | |
if err != nil { | |
panic(err) | |
} | |
data := make([]byte, 8) | |
rand.Read(data) | |
b.ResetTimer() | |
for i := 0; i < b.N; i++ { | |
for i := 0; i < 1000; i++ { | |
fp.Write(data) | |
fp2.Write(data) | |
if i%10 == 0 { | |
wg.Add(2) | |
go syncer(fp) | |
go syncer(fp2) | |
wg.Wait() | |
} | |
} | |
} | |
}) | |
} |
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