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Filesystem benchmark in Go
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package main | |
import ( | |
"fmt" | |
"os" | |
"testing" | |
) | |
func BenchmarkWrite(b *testing.B) { | |
for cnt, cntP := 10, 1; cntP <= 3; cnt, cntP = cnt*10, cntP+1 { | |
for bts, btsP := 10, 1; btsP <= 3; bts, btsP = bts*10, btsP+1 { | |
content := make([]byte, bts) | |
for i := 0; i < bts; i++ { | |
content[i] = byte('a' + (i % 26)) | |
} | |
os.Remove("testfile.txt") | |
b.Run(fmt.Sprintf("Write_%d_Bytes_%d_times", bts, cnt), func(b *testing.B) { | |
// Create test file | |
f, err := os.OpenFile("testfile.txt", os.O_CREATE, 0644) | |
if err != nil { | |
b.Error(err) | |
} | |
if err := f.Close(); err != nil { | |
b.Error(err) | |
} | |
// Perform repeated writes to file | |
b.ResetTimer() | |
for i := 0; i < cnt*b.N; i++ { | |
f, err := os.OpenFile("testfile.txt", os.O_WRONLY, 0644) | |
if err != nil { | |
b.Error(err) | |
} | |
if _, err := f.Write(content); err != nil { | |
b.Error(err) | |
} | |
if err := f.Sync(); err != nil { | |
b.Error(err) | |
} | |
if err := f.Close(); err != nil { | |
b.Error(err) | |
} | |
} | |
}) | |
} | |
} | |
} | |
func BenchmarkAppend(b *testing.B) { | |
for cnt, cntP := 10, 1; cntP <= 3; cnt, cntP = cnt*10, cntP+1 { | |
for bts, btsP := 10, 1; btsP <= 3; bts, btsP = bts*10, btsP+1 { | |
content := make([]byte, bts) | |
for i := 0; i < bts; i++ { | |
content[i] = byte('a' + (i % 26)) | |
} | |
os.Remove("testfile.txt") | |
b.Run(fmt.Sprintf("Append_%d_Bytes_%d_times", bts, cnt), func(b *testing.B) { | |
// Create file and immediately close it | |
f, err := os.OpenFile("testfile.txt", os.O_CREATE, 0644) | |
if err != nil { | |
b.Error(err) | |
} | |
if err := f.Close(); err != nil { | |
b.Error(err) | |
} | |
// Append bytes to file | |
b.ResetTimer() | |
for i := 0; i < cnt*b.N; i++ { | |
f, err := os.OpenFile("testfile.txt", os.O_WRONLY|os.O_APPEND, 0644) | |
if err != nil { | |
b.Error(err) | |
} | |
if _, err := f.Write(content); err != nil { | |
b.Error(err) | |
} | |
if err := f.Sync(); err != nil { | |
b.Error(err) | |
} | |
if err := f.Close(); err != nil { | |
b.Error(err) | |
} | |
} | |
}) | |
} | |
} | |
} |
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