using gettimeofday

I. How to Use the gettimeofday () function:1. Introduction: In C language, you can use the gettimeofday () function to get the time. Its precision can reach a subtle level2. function prototype: # Include Int gettimeofday (struct timeval * TV,

1. Introduction:You can use the function gettimeofday () function to get the time in C language. Its precision can be achieved by subtle2. Function Prototypes:#include int gettimeofday (struct timeval*tv,struct timezone *tz)3.

PHP uses the Gettimeofday function to return the current time and store it in an associative array. This article mainly introduces PHP using the Gettimeofday function to return the current time and stored in the associative array method, involving

The definition of struct timeval structure of struct timeval structure in time.h is as follows: struct Timeval { __time_t tv_sec; /* Seconds. */ __suseconds_t tv_usec; /* microseconds. */ }; Where Tv_sec is epoch to the number of seconds to create

I wrote a module client and shared it with the server. In order to speed up the query, I used hash_map. Today, a brother Lu tested that replacing hash_map with map is faster and a little dizzy. Write a paragraph by yourselfCodeUse Visual Studio C ++

PHP's built-in function file_get_contents must have been designed to read hard disk files. Therefore, when reading file content, if the disk is busy or data preparation is slow, file_get_contents will wait, expect that the data will arrive quickly

precise timing in microseconds Long Long l1,l2,l3; Timeval TV1; Take a Time Gettimeofday (&tv,null); L1 = tv.tv_sec*1000*1000 + tv.tv_usec; Execute some code, such as algorithm 1 ... Second time taken Gettimeofday (&tv,null); L2 = tv.tv_sec*1000*1

IOS Time Processing Do not have to do the app to deal with time, about the processing of time, there are many doorways, far from a row of API calls, get the current system time so simple. We need to understand the differences between the various

First, the use of the Select () function to achieve non-blocking wait time, using the structure of struct Timeval {}, here is not much to say. Second, use Gettimeofday () can obtain the subtle level (0.000001 seconds) of the system time, call two

Recently, the instructor said this: MMAP () memory ing can be used to copy files, and the speed is significantly faster than normal file copying.I tried to copy two files at a time.First, check the Code: # Include # Include# Include # Include#