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蔡万钊 写了：

顶我的 QBASIC 语言~~~

蔡万钊 写了：

顶我的 QBASIC 语言~~~

ChenFengyuan 写了：

代码： 全选

/*jslint node:true */
function fib(n) {
    "use strict";
    if (n < 2) {
	    return n;
    }
    return fib(n - 2) + fib(n - 1);
}
console.log(fib(40));

代码： 全选

% make c
cc -Wall -Wextra -g -O2    c.c   -o c
[Login] chenfengyuan at Fengyuans-MacBook-Air in /Users/chenfengyuan/tmp/test
% time node a.js
102334155
node a.js  1.79s user 0.02s system 100% cpu 1.794 total
[Login] chenfengyuan at Fengyuans-MacBook-Air in /Users/chenfengyuan/tmp/test
% time ./c      
102334155
./c  0.83s user 0.00s system 99% cpu 0.832 total

代码： 全选

(declaim (optimize (speed 3) (debug 0) (space 0) (safety 0)))
(defun fib (n)
  (case n
    ((0 1) n)
    (t (+ (fib (- n 1)) (fib (- n 2))))))

代码： 全选

CL-USER> (time (format t "~a~%" (fib 40)))
102334155
(FORMAT T "~a~%" (FIB 40))
took 1,399,947 microseconds (1.399947 seconds) to run.
During that period, and with 4 available CPU cores,
     1,399,866 microseconds (1.399866 seconds) were spent in user mode
           452 microseconds (0.000452 seconds) were spent in system mode
 432 bytes of memory allocated.
NIL
CL-USER> 

没把js,cl秒掉。。

蔡万钊 写了：

ChenFengyuan 写了：

代码： 全选

/*jslint node:true */
function fib(n) {
    "use strict";
    if (n < 2) {
	    return n;
    }
    return fib(n - 2) + fib(n - 1);
}
console.log(fib(40));

代码： 全选

% make c
cc -Wall -Wextra -g -O2    c.c   -o c
[Login] chenfengyuan at Fengyuans-MacBook-Air in /Users/chenfengyuan/tmp/test
% time node a.js
102334155
node a.js  1.79s user 0.02s system 100% cpu 1.794 total
[Login] chenfengyuan at Fengyuans-MacBook-Air in /Users/chenfengyuan/tmp/test
% time ./c      
102334155
./c  0.83s user 0.00s system 99% cpu 0.832 total

代码： 全选

(declaim (optimize (speed 3) (debug 0) (space 0) (safety 0)))
(defun fib (n)
  (case n
    ((0 1) n)
    (t (+ (fib (- n 1)) (fib (- n 2))))))

代码： 全选

CL-USER> (time (format t "~a~%" (fib 40)))
102334155
(FORMAT T "~a~%" (FIB 40))
took 1,399,947 microseconds (1.399947 seconds) to run.
During that period, and with 4 available CPU cores,
     1,399,866 microseconds (1.399866 seconds) were spent in user mode
           452 microseconds (0.000452 seconds) were spent in system mode
 432 bytes of memory allocated.
NIL
CL-USER> 

没把js,cl秒掉。。

硬件都不一样。没意义。

ChenFengyuan 写了：我的机器想跑个qbasic都得弄一段时间，如何秒基本全平台都有的py?

yjcong 写了：为什么没人试试forth呢？

eexpress 写了：都傻了，比一段代码。那种语言都可以挑出一段比其他语言有优势的代码。而且，速度不是语言的全部，编写方便是语言的另外一个支点。

上升点层次吧。其实，个人技巧，才是最重要的。

硬要比速度，等你们的代码能在12M的cpu上跑。再比吧。那时候，速度的差异放大无数倍了。lol