132 lines
3.4 KiB
PHP
132 lines
3.4 KiB
PHP
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<?php declare(strict_types = 1);
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/**
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* Duplicate database query collector.
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*
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* @package query-monitor
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*/
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if ( ! defined( 'ABSPATH' ) ) {
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exit;
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}
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/**
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* @extends QM_DataCollector<QM_Data_DB_Dupes>
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*/
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class QM_Collector_DB_Dupes extends QM_DataCollector {
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public $id = 'db_dupes';
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public function get_storage(): QM_Data {
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return new QM_Data_DB_Dupes();
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}
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/**
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* @return void
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*/
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public function process() {
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/** @var QM_Collector_DB_Queries|null $dbq */
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$dbq = QM_Collectors::get( 'db_queries' );
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if ( ! $dbq ) {
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return;
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}
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/** @var QM_Data_DB_Queries $dbq_data */
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$dbq_data = $dbq->get_data();
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if ( empty( $dbq_data->dupes ) ) {
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return;
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}
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// Filter out SQL queries that do not have dupes
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$this->data->dupes = array_filter( $dbq_data->dupes, array( $this, 'filter_dupe_items' ) );
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// Ignore dupes from `WP_Query->set_found_posts()`
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unset( $this->data->dupes['SELECT FOUND_ROWS()'] );
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$stacks = array();
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$callers = array();
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$components = array();
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$times = array();
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// Loop over all SQL queries that have dupes
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foreach ( $this->data->dupes as $sql => $query_ids ) {
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// Loop over each query
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foreach ( $query_ids as $query_id ) {
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if ( isset( $dbq_data->wpdb->rows[ $query_id ]['trace'] ) ) {
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/** @var QM_Backtrace */
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$trace = $dbq_data->wpdb->rows[ $query_id ]['trace'];
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$stack = array_column( $trace->get_filtered_trace(), 'id' );
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$component = $trace->get_component();
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// Populate the component counts for this query
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if ( isset( $components[ $sql ][ $component->name ] ) ) {
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$components[ $sql ][ $component->name ]++;
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} else {
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$components[ $sql ][ $component->name ] = 1;
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}
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} else {
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/** @var array<int, string> */
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$stack = $dbq_data->wpdb->rows[ $query_id ]['stack'];
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}
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// Populate the caller counts for this query
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if ( isset( $callers[ $sql ][ $stack[0] ] ) ) {
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$callers[ $sql ][ $stack[0] ]++;
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} else {
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$callers[ $sql ][ $stack[0] ] = 1;
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}
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// Populate the stack for this query
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$stacks[ $sql ][] = $stack;
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// Populate the time for this query
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if ( isset( $times[ $sql ] ) ) {
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$times[ $sql ] += $dbq->data->wpdb->rows[ $query_id ]['ltime'];
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} else {
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$times[ $sql ] = $dbq->data->wpdb->rows[ $query_id ]['ltime'];
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}
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}
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// Get the callers which are common to all stacks for this query
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$common = call_user_func_array( 'array_intersect', $stacks[ $sql ] );
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// Remove callers which are common to all stacks for this query
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foreach ( $stacks[ $sql ] as $i => $stack ) {
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$stacks[ $sql ][ $i ] = array_values( array_diff( $stack, $common ) );
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// No uncommon callers within the stack? Just use the topmost caller.
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if ( empty( $stacks[ $sql ][ $i ] ) ) {
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$stacks[ $sql ][ $i ] = array_keys( $callers[ $sql ] );
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}
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}
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// Wave a magic wand
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$sources[ $sql ] = array_count_values( array_column( $stacks[ $sql ], 0 ) );
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}
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if ( ! empty( $sources ) ) {
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$this->data->dupe_sources = $sources;
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$this->data->dupe_callers = $callers;
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$this->data->dupe_components = $components;
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$this->data->dupe_times = $times;
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}
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}
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}
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/**
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* @param array<string, QM_Collector> $collectors
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* @param QueryMonitor $qm
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* @return array<string, QM_Collector>
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*/
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function register_qm_collector_db_dupes( array $collectors, QueryMonitor $qm ) {
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$collectors['db_dupes'] = new QM_Collector_DB_Dupes();
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return $collectors;
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}
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add_filter( 'qm/collectors', 'register_qm_collector_db_dupes', 25, 2 );
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