1

pkg/utility/cmap/concurrentmap_test.go

@@ -0,0 +1,60 @@
+package cmap
+
+import (
+	"fmt"
+	"go-admin/pkg/utility"
+	"hash/crc32"
+	"testing"
+)
+
+// 离散性测试
+func Test_fnv32(t *testing.T) {
+	st := make(map[uint32]int)
+	for i := 0; i < 1000000; i++ {
+		fnv := crc32.ChecksumIEEE([]byte(utility.GenerateRandString(8)))
+		k := fnv & 15
+		count, ok := st[k]
+		if !ok {
+			st[k] = 1
+		}
+		st[k] = count + 1
+	}
+	for k, v := range st {
+		fmt.Println(k, "\t", float64(v)/1000000)
+	}
+}
+
+// go test -bench=_QE_ -benchmem -run=^$
+// -benchtime 默认为1秒  -benchmem 获得内存分配的统计数据
+// Benchmark_QE_1-6          146641              8192 ns/op              32 B/op          3 allocs/op
+// Benchmark_QE_2-6          143118              8246 ns/op              40 B/op          4 allocs/op
+//
+// Benchmark_QE_1-6          146289              8212 ns/op              32 B/op          3 allocs/op
+// Benchmark_QE_2-6          144918              8239 ns/op              40 B/op          4 allocs/op
+func Benchmark_QE_1(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		fnv32(utility.GenerateRandString(8))
+	}
+}
+
+func Benchmark_QE_2(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		crc32.ChecksumIEEE([]byte(utility.GenerateRandString(8)))
+	}
+}
+
+// go test -bench=_QE2_ -benchmem -benchtime=5s -run=^$
+// -benchtime 默认为1秒  -benchmem 获得内存分配的统计数据
+// Benchmark_QE2_1-6       1000000000               0.2623 ns/op          0 B/op          0 allocs/op
+// Benchmark_QE2_2-6       1000000000               0.2631 ns/op          0 B/op          0 allocs/op
+func Benchmark_QE2_1(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		_ = i & 31
+	}
+}
+
+func Benchmark_QE2_2(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		_ = i % 31
+	}
+}