Added PHP and core load collector.

src/Record/Core_Load_Collector.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace Rarst\Laps\Record;
+
+/**
+ * Covers pre–plugin load time from available data.
+ */
+class Core_Load_Collector implements Record_Collector_Interface {
+
+	/** @var float $timeload */
+	protected $timeload;
+
+	/**
+	 * Store core load end, plugin load start mark.
+	 */
+	public function __construct() {
+		$this->timeload = microtime( true );
+	}
+
+	/**
+	 * @return Record_Interface[]
+	 */
+	public function get_records() {
+
+		global $timestart;
+
+		$request_time = $_SERVER['REQUEST_TIME_FLOAT'];
+
+		return [
+			new Record( 'PHP Load', $request_time, $timestart - $request_time, '', 'php' ),
+			// TODO This includes network plugins on multisite, need conditional label if Laps is network–activated.
+			new Record( 'Core and MU Plugins Load', $timestart, $this->timeload - $timestart, '', 'core' ),
+		];
+	}
+}

src/Record/Timeline_Iterator.php

@@ -24,9 +24,7 @@ class Timeline_Iterator implements \Iterator {
 	 */
 	public function __construct( Recursive_Record_Iterator $iterator ) {
 
-		global $timestart;
-
-		$this->origin   = $timestart;
+		$this->origin   = $_SERVER['REQUEST_TIME_FLOAT'];
 		$this->iterator = $iterator;
 	}