Initial commit

wordpress_plugins/query-monitor/classes/Timer.php

@@ -0,0 +1,109 @@
+<?php
+/**
+ * Timer that collects timing and memory usage.
+ *
+ * @package query-monitor
+ */
+
+class QM_Timer {
+
+	protected $start = null;
+	protected $end   = null;
+	protected $trace = null;
+	protected $laps  = array();
+
+	public function start( array $data = null ) {
+		$this->trace = new QM_Backtrace();
+		$this->start = array(
+			'time'   => microtime( true ),
+			'memory' => memory_get_usage(),
+			'data'   => $data,
+		);
+		return $this;
+	}
+
+	public function stop( array $data = null ) {
+
+		$this->end = array(
+			'time'   => microtime( true ),
+			'memory' => memory_get_usage(),
+			'data'   => $data,
+		);
+
+		return $this;
+
+	}
+
+	public function lap( array $data = null, $name = null ) {
+
+		$lap = array(
+			'time'   => microtime( true ),
+			'memory' => memory_get_usage(),
+			'data'   => $data,
+		);
+
+		if ( ! isset( $name ) ) {
+			/* translators: %d: Timing lap number */
+			$i = sprintf( __( 'Lap %d', 'query-monitor' ), count( $this->laps ) + 1 );
+		} else {
+			$i = $name;
+		}
+
+		$this->laps[ $i ] = $lap;
+
+		return $this;
+
+	}
+
+	public function get_laps() {
+
+		$laps = array();
+		$prev = $this->start;
+
+		foreach ( $this->laps as $lap_id => $lap ) {
+
+			$lap['time_used']   = $lap['time'] - $prev['time'];
+			$lap['memory_used'] = $lap['memory'] - $prev['memory'];
+
+			$laps[ $lap_id ] = $lap;
+			$prev            = $lap;
+
+		}
+
+		return $laps;
+
+	}
+
+	public function get_time() {
+		return $this->end['time'] - $this->start['time'];
+	}
+
+	public function get_memory() {
+		return $this->end['memory'] - $this->start['memory'];
+	}
+
+	public function get_start_time() {
+		return $this->start['time'];
+	}
+
+	public function get_start_memory() {
+		return $this->start['memory'];
+	}
+
+	public function get_end_time() {
+		return $this->end['time'];
+	}
+
+	public function get_end_memory() {
+		return $this->end['memory'];
+	}
+
+	public function get_trace() {
+		return $this->trace;
+	}
+
+	public function end( array $data = null ) {
+		return $this->stop( $data );
+	}
+
+}