VII) CodeIgniter Source code Analysis of the benchmark.php

1<?phpif( !defined(' BasePath '))Exit(' No Direct script access allowed ');2 // ------------------------------------------------------------------------3 4 /**5 * CodeIgniter Benchmark Class6  */7 classCi_benchmark {8 9  /**Ten * List of all benchmark markers and when they were added One   */ A  var $marker=Array(); -  -  // -------------------------------------------------------------------- the  -  /** - * Set A benchmark marker -   */ +  functionMark$name) -  { +   //This method is very simple, that is, when invoking local law anywhere in the program, the current point in time is recorded.  A   $this->marker[$name] =Microtime(); at  } -  -  // -------------------------------------------------------------------- -  -  /** - * Calculates the time difference between and marked points. in * Calculates the time between two points in time.  -   */ to  functionElapsed_time ($point 1= ",$point 2= ",$decimals= 4) +  { -   /* the * If no definite point of time is given, then the time of the entire program is calculated.  * * How can we calculate the running time of the whole program? In fact, this calculation is performed by the output component.  $ * While calling Benchmark::elapsed_time (); (no arguments), essentially returning the first is notPanax Notoginseng * The entire program run time, also impossible to do, in essence, return is a {elapsed_time} tag, and then - * Output will calculate the entire program run time when processing the outputs, as the process output stage can be considered the * To be in the final phase, you can approximate the total time and then replace {elapsed_time} in the output.  + * the following memory_usage () principle is the same.  A * See: The _display () method in core/output.php.  the    */ +   if($point 1= = "') -   { $    return' {elapsed_time} '; $   } -  -   if( !isset($this->marker[$point 1])) the   { -    return‘‘;Wuyi   } the  -   if( !isset($this->marker[$point 2])) Wu   { -    $this->marker[$point 2] =Microtime(); About   } $  -   //Why this list is used here is because Microtime (); The return value is the format of "msec sec".  -   List($SM,$ss) =Explode(‘ ‘,$this->marker[$point 1]); -   List($em,$es) =Explode(‘ ‘,$this->marker[$point 2]); A  +   return Number_format(($em+$es) - ($SM+$ss),$decimals); the  } -  $  // -------------------------------------------------------------------- the  the  /** the * Memory Usage the   */ -  functionmemory_usage () in  { the   //Output::_display (); the   return' {memory_usage} '; About  } the  the}

VII) CodeIgniter Source code Analysis of the benchmark.php