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<?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName
/**
* Measure the performance of Jetpack Search queries.
*/
class Jetpack_Search_Performance_Logger {
/**
* Jetpack_Search_Performance_Logger instance.
*
* @var null|Jetpack_Search_Performance_Logger
*/
private static $instance = null;
/**
* WP_Query instance.
*
* @var null|WP_Query
*/
private $current_query = null;
/**
* Time when the query was started.
*
* @var null|float
*/
private $query_started = null;
/**
* Performance results.
*
* @var null|array
*/
private $stats = null;
/**
* Initialize the class.
*/
public static function init() {
if ( self::$instance === null ) {
self::$instance = new Jetpack_Search_Performance_Logger();
}
return self::$instance;
}
/**
* The constructor.
*/
private function __construct() {
$this->stats = array();
add_action( 'pre_get_posts', array( $this, 'begin_log_query' ), 10, 1 );
add_action( 'did_jetpack_search_query', array( $this, 'log_jetpack_search_query' ) );
add_filter( 'found_posts', array( $this, 'log_mysql_query' ), 10, 2 );
add_action( 'wp_footer', array( $this, 'print_stats' ) );
}
/**
* Log the time when the query was started.
*
* @param WP_Query $query The query.
*/
public function begin_log_query( $query ) {
if ( $this->should_log_query( $query ) ) {
$this->query_started = microtime( true );
$this->current_query = $query;
}
}
/**
* Record the time when an SQL query was completed.
*
* @param int $found_posts The number of posts found.
* @param WP_Query $query The WP_Query instance (passed by reference).
*/
public function log_mysql_query( $found_posts, $query ) {
if ( $this->current_query === $query ) {
$duration = microtime( true ) - $this->query_started;
if ( $duration < 60 ) { // eliminate outliers, likely tracking errors.
$this->record_query_time( $duration, false );
}
$this->reset_query_state();
}
return $found_posts;
}
/**
* Log Jetpack Search query.
*/
public function log_jetpack_search_query() {
$duration = microtime( true ) - $this->query_started;
if ( $duration < 60 ) { // eliminate outliers, likely tracking errors.
$this->record_query_time( $duration, true );
}
$this->reset_query_state();
}
/**
* Reset data after each log.
*/
private function reset_query_state() {
$this->query_started = null;
$this->current_query = null;
}
/**
* Check if a query should be logged (a main query, or a jetpack search query).
*
* @param WP_Query $query The WP_Query instance.
*/
private function should_log_query( $query ) {
return $query->is_main_query() && $query->is_search();
}
/**
* Record the time of a query.
*
* @param float $duration The duration of the query.
* @param bool $was_jetpack_search Was this a Jetpack Search query.
*/
private function record_query_time( $duration, $was_jetpack_search ) {
$this->stats[] = array( $was_jetpack_search, (int) ( $duration * 1000 ) );
}
/**
* Print performance stats in the footer.
*/
public function print_stats() {
$beacons = array();
if ( ! empty( $this->stats ) ) {
foreach ( $this->stats as $stat ) {
$search_type = $stat[0] ? 'es' : 'mysql';
$beacons[] = "%22jetpack.search.{$search_type}.duration:{$stat[1]}|ms%22";
}
$encoded_json = '{%22beacons%22:[' . implode( ',', $beacons ) . ']}';
$encoded_site_url = rawurlencode( site_url() );
$url = "https://pixel.wp.com/boom.gif?v=0.9&u={$encoded_site_url}&json={$encoded_json}";
echo '<img src="' . esc_url( $url ) . '" width="1" height="1" style="display:none;" alt=""/>';
}
}
}