随机

rand/rand_test.go

@@ -0,0 +1,118 @@
+package rand_test
+
+import (
+	"bytes"
+	"testing"
+	"time"
+
+	mrnd "math/rand"
+
+	"github.com/charlienet/go-mixed/rand"
+)
+
+func TestRandString(t *testing.T) {
+	t.Log(rand.AllChars.RandString(20))
+
+	// b, err := rand.RandBytes(32)
+	// t.Log(err)
+	// t.Log(hex.EncodeToString(b))
+}
+
+func TestRandHex(t *testing.T) {
+	h := rand.Hex.RandString(8)
+	t.Log(h)
+}
+
+func TestRandMax(t *testing.T) {
+	mrnd.Seed(time.Now().UnixNano())
+}
+
+func BenchmarkParallel(b *testing.B) {
+	rand.Hex.RandString(16)
+
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			rand.Hex.RandString(16)
+		}
+	})
+}
+
+func BenchmarkNoop(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		rand.AllChars.RandString(16)
+	}
+}
+
+func BenchmarkRandString(b *testing.B) {
+
+	for i := 0; i < 10; i++ {
+		rand.Hex.RandString(10)
+	}
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		rand.Hex.RandString(20)
+	}
+
+	// b.Run("randString", func(b *testing.B) {
+
+	// 	for i := 0; i < b.N; i++ {
+	// 		rand.Hex.RandString(256)
+	// 	}
+	// })
+
+	// for i := 0; i < b.N; i++ {
+	// 	rand.RandBytes(16)
+	// }
+}
+
+func BenchmarkString(b *testing.B) {
+	elems := []byte("abcdefghijk")
+
+	b.Run("1", func(b *testing.B) {
+		a := []byte{}
+		for i := 0; i < b.N; i++ {
+			for _, elem := range elems {
+				a = append(a, elem)
+			}
+		}
+	})
+
+	b.Run("2", func(b *testing.B) {
+		a := make([]byte, len(elems))
+		for i := 0; i < b.N; i++ {
+			for _, elem := range elems {
+				a = append(a, elem)
+			}
+		}
+	})
+
+	b.Run("3", func(b *testing.B) {
+		a := make([]byte, len(elems))
+		for i := 0; i < b.N; i++ {
+			a = append(a, elems...)
+		}
+	})
+}
+
+func BenchmarkConcatString(b *testing.B) {
+	elems := []string{"1", "2", "3", "4", "5"}
+
+	b.Run("add", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			ret := ""
+			for _, elem := range elems {
+				ret += elem
+			}
+		}
+	})
+
+	b.Run("buffer", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			var buf bytes.Buffer
+			for _, elem := range elems {
+				buf.WriteString(elem)
+			}
+		}
+	})
+}