1

pkg/utility/biginthelper/bighelper_test.go

@@ -0,0 +1,55 @@
+package biginthelper
+
+import (
+	"fmt"
+	"math/rand"
+	"strconv"
+	"strings"
+	"testing"
+)
+
+func Test_ParseBigInt(t *testing.T) {
+	fmt.Println(ParseBigInt(`231513`))
+	fmt.Println(ParseBigInt(`654wdf16`))
+	fmt.Println(ParseBigInt(`5455_1655`))
+	fmt.Println(ParseBigInt(``))
+	fmt.Println(ParseBigInt(`af`))
+}
+func Test_IntToHex(t *testing.T) {
+	fmt.Println(strings.TrimLeft(`01615`, "0"))
+	fmt.Println(strings.TrimLeft(`1615`, "0"))
+	fmt.Println(strings.TrimLeft(`0x1615`, "0"))
+}
+
+// i := int64(32)
+// s := strconv.FormatInt(i, 16)
+// println(s)
+
+// 对比strconv.FormatInt(i, 16)和fmt.Sprintf("0x%x", i)的性能消耗
+// go test -bench=_QE_ -benchmem
+// -benchtime 默认为1秒  -benchmem 获得内存分配的统计数据
+func Benchmark_QE_strconv(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		strconv.FormatInt(getInt64(), 16)
+	}
+}
+
+func Benchmark_QE_fmt(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		fmt.Sprintf("0x%x", getInt64())
+	}
+}
+
+func getInt64() int64 {
+	return int64(rand.Intn(10000))
+}
+
+// 结果
+// Benchmark_QE_strconv-6          47142570                24.29 ns/op            5 B/op          1 allocs/op
+// Benchmark_QE_fmt-6              14787649                82.41 ns/op            8 B/op          1 allocs/op
+
+// 改为随机数后
+// Benchmark_QE_strconv-6          27890760                42.48 ns/op            3 B/op          0 allocs/op
+// Benchmark_QE_fmt-6              10595380               108.6 ns/op            15 B/op          1 allocs/op
+
+// 结论 尽量使用  strconv.FormatInt(i, 16) 进行16进制的转换