Full source code analysis of CI framework core file (Benchmark test class) Benchmark. php

In the CI framework, the Benchmark test class Benchmark. php is used to calculate the time difference between any two mark points. & Amp; lt ;? Phpif (! Defined ('basepath') exit ('nodirectscri

In the CI framework, the Benchmark test class Benchmark. php is used to calculate the time difference between any two mark points.

 Marker [$ name] = microtime ();}/*** calculate the running time between any two points */function elapsed_time ($ point1 = '', $ point2 = '', $ decimals = 4) {if ($ point1 = '') {return '{elapsed_time}';} if (! Isset ($ this-> marker [$ point1]) {return '';} if (! Isset ($ this-> marker [$ point2]) {$ this-> marker [$ point2] = microtime () ;}// use list () is also inevitable, because the microtime () function returns a string in the format of "msec sec", that is, the number of microseconds and the number of seconds. list ($ sm, $ ss) = explode ('', $ this-> marker [$ point1]); list ($ em, $ es) = explode ('', $ this-> marker [$ point2]); return number_format ($ em + $ es)-($ sm + $ ss), $ decimals);} function memory_usage () {return '{memory_usage }';}}

You can use this Benchmark to test PHP performance in your own program.