jetpack / _inc / lib / class.jetpack-search-performance-logger.php

class.jetpack-search-performance-logger.php in Jetpack – WP Security, Backup, Speed, & Growth 16.3-a.7, at _inc/lib/class.jetpack-search-performance-logger.php

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1	<?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName
2
3	/**
4	* Measure the performance of Jetpack Search queries.
5	*/
6	class Jetpack_Search_Performance_Logger {
7	/**
8	* Jetpack_Search_Performance_Logger instance.
9	*
10	* @var null\|Jetpack_Search_Performance_Logger
11	*/
12	private static $instance = null;
13
14	/**
15	* WP_Query instance.
16	*
17	* @var null\|WP_Query
18	*/
19	private $current_query = null;
20
21	/**
22	* Time when the query was started.
23	*
24	* @var null\|float
25	*/
26	private $query_started = null;
27
28	/**
29	* Performance results.
30	*
31	* @var null\|array
32	*/
33	private $stats = null;
34
35	/**
36	* Initialize the class.
37	*/
38	public static function init() {
39	if ( self::$instance === null ) {
40	self::$instance = new Jetpack_Search_Performance_Logger();
41	}
42
43	return self::$instance;
44	}
45
46	/**
47	* The constructor.
48	*/
49	private function __construct() {
50	$this->stats = array();
51	add_action( 'pre_get_posts', array( $this, 'begin_log_query' ), 10, 1 );
52	add_action( 'did_jetpack_search_query', array( $this, 'log_jetpack_search_query' ) );
53	add_filter( 'found_posts', array( $this, 'log_mysql_query' ), 10, 2 );
54	add_action( 'wp_footer', array( $this, 'print_stats' ) );
55	}
56
57	/**
58	* Log the time when the query was started.
59	*
60	* @param WP_Query $query The query.
61	*/
62	public function begin_log_query( $query ) {
63	if ( $this->should_log_query( $query ) ) {
64	$this->query_started = microtime( true );
65	$this->current_query = $query;
66	}
67	}
68
69	/**
70	* Record the time when an SQL query was completed.
71	*
72	* @param int $found_posts The number of posts found.
73	* @param WP_Query $query The WP_Query instance (passed by reference).
74	*/
75	public function log_mysql_query( $found_posts, $query ) {
76	if ( $this->current_query === $query ) {
77	$duration = microtime( true ) - $this->query_started;
78	if ( $duration < 60 ) { // eliminate outliers, likely tracking errors.
79	$this->record_query_time( $duration, false );
80	}
81	$this->reset_query_state();
82	}
83
84	return $found_posts;
85	}
86
87	/**
88	* Log Jetpack Search query.
89	*/
90	public function log_jetpack_search_query() {
91	$duration = microtime( true ) - $this->query_started;
92	if ( $duration < 60 ) { // eliminate outliers, likely tracking errors.
93	$this->record_query_time( $duration, true );
94	}
95	$this->reset_query_state();
96	}
97
98	/**
99	* Reset data after each log.
100	*/
101	private function reset_query_state() {
102	$this->query_started = null;
103	$this->current_query = null;
104	}
105
106	/**
107	* Check if a query should be logged (a main query, or a jetpack search query).
108	*
109	* @param WP_Query $query The WP_Query instance.
110	*/
111	private function should_log_query( $query ) {
112	return $query->is_main_query() && $query->is_search();
113	}
114
115	/**
116	* Record the time of a query.
117	*
118	* @param float $duration The duration of the query.
119	* @param bool $was_jetpack_search Was this a Jetpack Search query.
120	*/
121	private function record_query_time( $duration, $was_jetpack_search ) {
122	$this->stats[] = array( $was_jetpack_search, (int) ( $duration * 1000 ) );
123	}
124
125	/**
126	* Print performance stats in the footer.
127	*/
128	public function print_stats() {
129	$beacons = array();
130	if ( ! empty( $this->stats ) ) {
131	foreach ( $this->stats as $stat ) {
132	$search_type = $stat[0] ? 'es' : 'mysql';
133	$beacons[] = "%22jetpack.search.{$search_type}.duration:{$stat[1]}\|ms%22";
134	}
135
136	$encoded_json = '{%22beacons%22:[' . implode( ',', $beacons ) . ']}';
137	$encoded_site_url = rawurlencode( site_url() );
138	$url = "https://pixel.wp.com/boom.gif?v=0.9&u={$encoded_site_url}&json={$encoded_json}";
139	echo '<img src="' . esc_url( $url ) . '" width="1" height="1" style="display:none;" alt=""/>';
140	}
141	}
142	}
143