首先,将代码放入主题文件function.php中
代码

/*     
 * 加载时间
 * @return bool
 */
function timer_start() {
    global $timestart;
    $mtime     = explode( ' ', microtime() );
    $timestart = $mtime[1] + $mtime[0];
    return true;
}
timer_start();
function timer_stop( $display = 0, $precision = 3 ) {
    global $timestart, $timeend;
    $mtime     = explode( ' ', microtime() );
    $timeend   = $mtime[1] + $mtime[0];
    $timetotal = number_format( $timeend - $timestart, $precision );
    $r         = $timetotal < 1 ? $timetotal * 1000 . " ms" : $timetotal . " s";
    if ( $display ) {
        echo $r;
    }
    return $r;
}

任选其一去footer.php挂载代码,也可以去post.php挂载

加载用时：<?php echo timer_stop();?>
    <!--加载时间-->
<li class="mate-time"><i class="fontello fontello-spinner"></i>&nbsp;<span class="mate-value"><a>加载用时</a><?php echo timer_stop();?></span></li>