這篇
1、先說Go吧,因為我個人最近正在用,感覺很不錯
package main
import "fmt"
func main(){
fmt.Println(fibonacci(34))
}
func fibonacci(i int) int{
if(i<2){
return i;
}
return fibonacci(i-2) + fibonacci(i-1);
}
先用 Go1.7看看:
複制
代碼如下:
qi[email protected]:/works/learnCPP$ go version && time go
go version go1.7.5 darwin/amd64real 0m0.206s
user 0m0.165s
sys 0m0.059s
real 0m0.052s
user 0m0.045s
sys 0m0.004s
然後,再看看1.8的:
代碼如下:
[email protected]:/works/learnCPP$ go18 version && time go18 build fib.go && time ./fib
go version go1.8 darwin/amd64real 0m0.204s
user 0m0.153s
sys 0m0.062s
real 0m0.051s
user 0m0.045s
sys 0m0.003s
感覺看不出差異,但官方1.8在GC、Compile等方面優化提升了20%,可能是這demo太簡單了吧。
2、再來寫Java,雖然它很火,感覺太臃腫了
class Fib{
public static vo
System.out.println(fibonacci(34));
}
static int fibonacci( int i){
if(i<2) return i;
return fibonacci(i-2) + fibonacci(i-1);
}
}
[email protected]:/works/learnCPP$ java -version && time javac Fib.java && time java Fib
java version "1.8.0_25"
Java(TM) SE Runtime Environment (build 1.8.0_25-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed mode)
real 0m0.952s
user 0m1.302s
sys 0m0.144s
real 0m0.150s
user 0m0.123s
sys 0m0.025s
性能還行, Compile