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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 | } |