cocos2d-x 中c++ lua js获取前后时间差 毫秒级别代码

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1. c++:
   
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5. double millisecondNow() {
   
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7.    struct timeval tv;
   
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9.     gettimeofday(&tv, nullptr);
   
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11.     log("CurrentTime MillSecond %f", (double)tv.tv_sec * 1000 + (double)tv.tv_usec / 1000);
    
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13.     return (double)tv.tv_sec * 1000 + (double)tv.tv_usec / 1000;
    
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15. }
    
16. 
    
17. auto milliS1=millisecondNow();
    
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19.     CCLOG ("milliS1: %f \n",milliS1);
    
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21.     for( int i = 0; i < 100000000; i ++ )
    
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23.       {
    
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25.       }
    
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27.     auto milliS2=millisecondNow();
    
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29.     CCLOG ("milliS2: %f \n",milliS2);
    
30. 
    
31.     CCLOG ("消耗秒: %f \n",(milliS2-milliS1)/1000);
    
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39. js:
    
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47. var time1 = Date.now();
    
48. 
    
49.           cc.log("time1:" + time1);
    
50. 
    
51.           for (var i = 0, lenI = 100000000; i < lenI; i++) {
    
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53.           }
    
54. 
    
55.           var time2 = Date.now();
    
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57.           cc.log("time2:" + Date.now());
    
58. 
    
59.           cc.log("use time:" + ((time2 - time1)/1000)+"s");
    
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73. lua:
    
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79. local socket = require "socket"
    
80. 
    
81. local t0 = socket.gettime()
    
82. 
    
83. -- do something
    
84. 
    
85. for i=1,100000000 do
    
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87.      
    
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89. end
    
90. 
    
91. local t1 = socket.gettime()
    
92. 
    
93. print("used time: "..t1)
    
94. 
    
95. print("used time: "..t0)
    
96. 
    
97. print("used time: "..t1-t0.."s")

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