gettimeofday

Time () provides second-level precision 1. header file 2, the function prototype time_t time (time_t * timer) function returns the number of seconds from the TC1970-1-1 0: 0 to the present with the time () function combined with other functions

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 ++

An attempt to use LTT to tune the bluetooth module 1 goalThe basic goal is to use LTT to observe the system running status of the bluetooth module during mass data transmission, and strive to find some factors that affect the system performance and

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

  Date and Time Asctime Ctime Gettimeofday Gmtime Localtime Mktime Settimeofday Time Asctime (represents the time and date in string format) Related functions Time, ctime, gmtime, localtime Header file # Include Define functions Char * asctime

  ========================================================== ====Author: yuanlulu Http://blog.csdn.net/yuanlulu No copyright, but please keep this statement for reprinting========================================================== ==== The customer

  1) ANSI clock functions 1) Overview:Clock_t is the return value type of the clock function. It is divided by clocks_per_sec to get the time. Generally, two clock functions are used to calculate the time when the process runs. ANSI clock has three

PHP uniqid function Execution Slow problem Previous time a requirement: a customer submits a simple form to create a scratch card activity H5 page that adapts to the full terminal (Pc,pad,phone), which involves the ability of a customer to generate

Today in the company code to see the use of the time-out function of the Select function as the use of timers, and then organized the following several micro-level Linux timer. In my Ubutu10.10 dual-core environment, the compilation passes.[CPP]View

Date and time (asctimectimegettimeofdaygmtimelocaltimemktimesettimeofdaytimeasctime (expressed in string format) related functions time, ctime, gmtime, localtime header file # include & lt; time. h & gt; define the function char * ascti   Date and

Unit testing is an essential and important part of a complete software development process. Writing unit tests is usually not difficult, but sometimes it's difficult to write tests because some code and features are hard to test. Therefore, it is

FAQ for Set (GO)(1) Why is the insertion and deletion efficiency of map and set higher than with other sequence containers?Most people say it's simple because there's no need for memory copy and memory movement for associative containers. That's

/* * @FileName: TEST_SLEEP.C * @Author: WZJ * @Brief: * * * @History: * * @Date: February 07, 2012 Tuesday 22:20:00 * */ #include #include #include #include #include #include #include #include #include

Http://net.pku.edu.cn/~yhf/linux_c/function/04.html 　 Asctime (the time and date are represented in string format) Related functions Time,ctime,gmtime,localtime Table header File

Asctime (represents the time and date in string format) Related functions Time, ctime, gmtime, localtime Header file # Include Define functions Char * asctime (const struct TM * timeptr ); Function

Under the Unix/linux system, the Gettimeofday function is used to obtain the timestamp of the current system, which can reach a microsecond (microsecond, or μs) level.The information for the current timestamp is stored through the struct

Reprinted from: http://velep.com/archives/973.htmlThe run time of a statistical function or a piece of code is often encountered in software development. The running time can be used to analyze the operation efficiency and performance of the