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//+build go1.7
package shuffle_test
import (
"fmt"
"math/rand"
"testing"
"github.com/shogo82148/go-shuffle"
)
func ExampleInts() {
x := []int{1, 2, 3, 4, 5}
shuffle.Ints(x)
for _, value := range x {
fmt.Println(value)
// Unordered output:
// 1
// 2
// 3
// 4
// 5
}
}
func BenchmarkInts(b *testing.B) {
for _, n := range []int{1, 10, 100, 1000, 10000} {
b.Run(fmt.Sprintf("shuffle %d", n), func(b *testing.B) {
a := make([]int, n)
for i := 0; i < b.N; i++ {
shuffle.Ints(a)
}
})
b.Run(fmt.Sprintf("perm %d", n), func(b *testing.B) {
for i := 0; i < b.N; i++ {
rand.Perm(n)
}
})
b.Run(fmt.Sprintf("perm and move %d", n), func(b *testing.B) {
s1 := make([]int, n)
s2 := make([]int, n)
for i := 0; i < b.N; i++ {
for i, j := range rand.Perm(n) {
s2[i] = s1[j]
}
}
})
}
}
func BenchmarkFloat64s(b *testing.B) {
for _, n := range []int{1, 10, 100, 1000, 10000} {
b.Run(fmt.Sprintf("shuffle %d", n), func(b *testing.B) {
a := make([]float64, n)
for i := 0; i < b.N; i++ {
shuffle.Float64s(a)
}
})
b.Run(fmt.Sprintf("perm and move %d", n), func(b *testing.B) {
s1 := make([]float64, n)
s2 := make([]float64, n)
for i := 0; i < b.N; i++ {
for i, j := range rand.Perm(n) {
s2[i] = s1[j]
}
}
})
}
}
|
