finish time profiles patterns

README.md

@@ -44,6 +44,11 @@ Go常用的、面向工程化和最佳实践的模式套路，包含常见的23
 + [访问者模式(Visitor)](./behavior/23_visitor)
 + [闭包选项模式(Function Option)](./behavior/26_option)
 
+## Go More
+
++ [发布订阅模式(Pub-Sub)](./gomore/messages)
++ [时差模式(Time Profile)](./gomore/profiles)
+
 ## 参考资料(Design patters Articles)
 
 [GO模式文档](https://github.com/nynicg/go-patterns)

gomore/profiles/README.md

@@ -0,0 +1,17 @@
+# 时间差模式
+
+算是一个技巧：
+
+`defer`后面跟的函数参数会被第一时间计算并存储在函数计算过程本地
+//当函数在被调用时会利用前面已经存储的值进行计算
+
+  ```go
+  func YourMainFunction(input SomeType) error {
+
+	defer YourFunc(time.Now(), ....) //一定要放在函数的第一行或者你想要计算时差的代码的前面.
+
+  //其他代码..
+
+
+}
+  ```

gomore/profiles/profiles_test.go

@@ -0,0 +1,45 @@
+package profile
+
+import (
+	"log"
+	"math/big"
+	"time"
+	"testing"
+)
+
+
+func TestBigintProfile(t *testing.T) {
+
+
+	bigint :=	big.NewInt(14468)
+
+	BigIntFactorial(bigint) 
+
+	bigint = big.NewInt(24566)
+
+	BigIntFactorial(bigint) 
+
+}
+
+
+//Duration for time differ
+func Duration(invocation time.Time, name string) {
+	elapsed := time.Since(invocation)
+
+	log.Printf("%s lasted %s", name, elapsed)
+}
+
+//BigIntFactorial ...
+func BigIntFactorial(input *big.Int) *big.Int {
+
+	//关键点是这一句.
+	defer Duration(time.Now(), "IntFactorial")
+
+	x := input
+	y := big.NewInt(1)
+	for one := big.NewInt(1); x.Sign() > 0; x.Sub(x, one) {
+		y.Mul(y, x)
+	}
+
+	return x.Set(y)
+}