jdl_bench有哪些具体应用场景？

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plaintext记录开始时间：microtime()public function start_bench(){ $this->start_time=microtime();}

public function end_bench(){ $this->end_time=microtime(); $this->execute_time=$this->end_time - $this->start_time; if (SHOW_BENCH) { echo 执行时间：{$this->execute_time}; }}

start_time = microtime(); } public function start_bench(){ $this->start_time = microtime(); } public function end_bench(){ $this->end_time = microtime(); $this->execute_time = $this->end_time - $this->start_time; if(SHOW_BENCH) var_dump($this->execute_time); } }