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package main | |
import ( | |
"fmt" | |
"math/rand" | |
"strings" | |
"testing" | |
"time" | |
) | |
func BenchmarkGenerateKey(b *testing.B) { | |
const str = "1234567890qwertyuiopasdfghjklzxcvbnm" | |
rand.Seed(time.Now().Unix()) | |
pattern := make([]string, 100) | |
for i := range pattern { | |
end := rand.Intn(len(str) - 5) | |
pattern[i] = str[:end] | |
} | |
b.Run("strings.join", func(b *testing.B) { | |
for n := 0; n < b.N; n++ { | |
for i := 0; i < len(pattern)-2; i++ { | |
_ = strings.Join([]string{"", | |
pattern[i], | |
pattern[i+1], | |
pattern[i+2], | |
}, "/") | |
} | |
} | |
}) | |
b.Run("string.Builder", func(b *testing.B) { | |
for n := 0; n < b.N; n++ { | |
for i := 0; i < len(pattern)-2; i++ { | |
var buf strings.Builder | |
buf.WriteString("/") | |
buf.WriteString(pattern[i]) | |
buf.WriteString("/") | |
buf.WriteString(pattern[i+1]) | |
buf.WriteString("/") | |
buf.WriteString(pattern[i+2]) | |
_ = buf.String() | |
} | |
} | |
}) | |
b.Run("string.Builder/grow", func(b *testing.B) { | |
for n := 0; n < b.N; n++ { | |
for i := 0; i < len(pattern)-2; i++ { | |
var buf strings.Builder | |
buf.Grow(len(pattern[i]) + len(pattern[i+1]) + len(pattern[i+2]) + 3) | |
buf.WriteString("/") | |
buf.WriteString(pattern[i]) | |
buf.WriteString("/") | |
buf.WriteString(pattern[i+1]) | |
buf.WriteString("/") | |
buf.WriteString(pattern[i+2]) | |
_ = buf.String() | |
} | |
} | |
}) | |
b.Run("fmt.Sprintf", func(b *testing.B) { | |
for n := 0; n < b.N; n++ { | |
for i := 0; i < len(pattern)-2; i++ { | |
_ = fmt.Sprintf("/%s/%s/%s", pattern[i], pattern[i+1], pattern[i+2]) | |
} | |
} | |
}) | |
} |
Author
suzujun
commented
Aug 26, 2022
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