Profile a modified version of `get_query_template` to see if we can speed it up.

README.md

Benchmark for get_query_template

Profile a modified version of get_query_template to see if we can speed it up.

This is used to benchmark the patch introduced for Trac ticket #59315.

Average time spent for 10 x 18 iterations.

TT3 ( Block theme )

get_query_template() - 0.04080924987793 new_get_query_template() - 0.039115571975708 Change: -4.2%
get_query_template() - 0.036437177658081 new_get_query_template() - 0.033733105659485 Change: -7.4%
get_query_template() - 0.03502893447876 new_get_query_template() - 0.033513689041138 Change: -4.3%
get_query_template() - 0.035555481910706 new_get_query_template() - 0.033641672134399 Change: -5.4%
get_query_template() - 0.036332750320435 new_get_query_template() - 0.034693217277527 Change: -4.5%
get_query_template() - 0.035776114463806 new_get_query_template() - 0.034015727043152 Change: -4.9%
get_query_template() - 0.035825991630554 new_get_query_template() - 0.03460590839386 Change: -3.4%
get_query_template() - 0.036041331291199 new_get_query_template() - 0.033895254135132 Change: -6%
get_query_template() - 0.035417985916138 new_get_query_template() - 0.033571100234985 Change: -5.2%
get_query_template() - 0.03657169342041 new_get_query_template() - 0.034809374809265 Change: -4.8%

TT1 ( Classic theme )

get_query_template() - 0.001415491104126 new_get_query_template() - 0.0013654470443726 Change: -3.5%
get_query_template() - 0.0014647960662842 new_get_query_template() - 0.0013648748397827 Change: -6.8%
get_query_template() - 0.0014342069625854 new_get_query_template() - 0.0013604879379272 Change: -5.1%
get_query_template() - 0.0014017581939697 new_get_query_template() - 0.0013597965240479 Change: -3%
get_query_template() - 0.0014153242111206 new_get_query_template() - 0.0013453006744385 Change: -4.9%
get_query_template() - 0.0014492034912109 new_get_query_template() - 0.0013694286346436 Change: -5.5%
get_query_template() - 0.0013886690139771 new_get_query_template() - 0.0013503074645996 Change: -2.8%
get_query_template() - 0.0015052080154419 new_get_query_template() - 0.0014845132827759 Change: -1.4%
get_query_template() - 0.0013949394226074 new_get_query_template() - 0.0013380289077759 Change: -4.1%
get_query_template() - 0.0014493227005005 new_get_query_template() - 0.0014261722564697 Change: -1.6%

profile-get_query_template.php

<?php

// Bootstrapping.

define('WP_USE_THEMES', true);

/** Loads the WordPress Environment and Template */
require ('wp-load.php');

// Setup.

$urls = [
    '404',
    'archive',
    'attachment',
    'author',
    'category',
    'date',
    'embed',
    'frontpage',
    'home',
    'index',
    'page',
    'paged',
    'privacypolicy',
    'search',
    'single',
    'singular',
    'tag',
    'taxonomy',
];

$repetitions = 10;
$iterations  = 19;

$stringcount = count( $urls );

function microtime_float() {
	list( $usec, $sec ) = explode( ' ', microtime() );
	return ( (float) $usec + (float) $sec );
}

// Refactoring functions.
function new_get_query_template( $type, $templates = array() ) {
	$type = preg_replace( '|[^a-z0-9-]+|', '', $type );

	if ( empty( $templates ) ) {
		$templates = array( "{$type}.php" );
	}

	/**
	 * Filters the list of template filenames that are searched for when retrieving a template to use.
	 *
	 * The dynamic portion of the hook name, `$type`, refers to the filename -- minus the file
	 * extension and any non-alphanumeric characters delimiting words -- of the file to load.
	 * The last element in the array should always be the fallback template for this query type.
	 *
	 * Possible hook names include:
	 *
	 *  - `404_template_hierarchy`
	 *  - `archive_template_hierarchy`
	 *  - `attachment_template_hierarchy`
	 *  - `author_template_hierarchy`
	 *  - `category_template_hierarchy`
	 *  - `date_template_hierarchy`
	 *  - `embed_template_hierarchy`
	 *  - `frontpage_template_hierarchy`
	 *  - `home_template_hierarchy`
	 *  - `index_template_hierarchy`
	 *  - `page_template_hierarchy`
	 *  - `paged_template_hierarchy`
	 *  - `privacypolicy_template_hierarchy`
	 *  - `search_template_hierarchy`
	 *  - `single_template_hierarchy`
	 *  - `singular_template_hierarchy`
	 *  - `tag_template_hierarchy`
	 *  - `taxonomy_template_hierarchy`
	 *
	 * @since 4.7.0
	 *
	 * @param string[] $templates A list of template candidates, in descending order of priority.
	 */
	$templates = apply_filters( "{$type}_template_hierarchy", $templates );

	$block_template = locate_block_template( '', $type, $templates );
	if ( $block_template ) {
		return $block_template;
	}

	$template = locate_template( $templates );

	/**
	 * Filters the path of the queried template by type.
	 *
	 * The dynamic portion of the hook name, `$type`, refers to the filename -- minus the file
	 * extension and any non-alphanumeric characters delimiting words -- of the file to load.
	 * This hook also applies to various types of files loaded as part of the Template Hierarchy.
	 *
	 * Possible hook names include:
	 *
	 *  - `404_template`
	 *  - `archive_template`
	 *  - `attachment_template`
	 *  - `author_template`
	 *  - `category_template`
	 *  - `date_template`
	 *  - `embed_template`
	 *  - `frontpage_template`
	 *  - `home_template`
	 *  - `index_template`
	 *  - `page_template`
	 *  - `paged_template`
	 *  - `privacypolicy_template`
	 *  - `search_template`
	 *  - `single_template`
	 *  - `singular_template`
	 *  - `tag_template`
	 *  - `taxonomy_template`
	 *
	 * @since 1.5.0
	 * @since 4.8.0 The `$type` and `$templates` parameters were added.
	 *
	 * @param string   $template  Path to the template. See locate_template().
	 * @param string   $type      Sanitized filename without extension.
	 * @param string[] $templates A list of template candidates, in descending order of priority.
	 */
	return apply_filters( "{$type}_template", $template, $type, $templates );
}

// Profiling.

for ( $repetition = 0; $repetition <= $repetitions; $repetition ++ ) {

	if( $repetition == 0 ) {
		continue;
	}

	$time_start = microtime_float();

	for ( $index = 0; $index < $iterations; $index ++ ) {
		$url    = $urls[ $index % $stringcount ];
		$result = get_query_template( $url );
	}

	$time_end                    = microtime_float();
	$get_query_template_time[ $repetition ] = $time_end - $time_start;

	$time_start = microtime_float();

	for ( $index = 0; $index < $iterations; $index ++ ) {
		$url    = $urls[ $index % $stringcount ];
		$result = new_get_query_template( $url );
	}

	$time_end                        = microtime_float();
	$new_get_query_template_time[ $repetition ] = $time_end - $time_start;
}

$get_query_template_time_avg     = array_sum( $get_query_template_time ) / $repetitions;
$new_get_query_template_time_avg = array_sum( $new_get_query_template_time ) / $repetitions;
$percentage           = round( $new_get_query_template_time_avg / $get_query_template_time_avg * 100, 1 ) - 100;

printf( "Average time spent for {$repetitions} x {$iterations} iterations:\n    get_query_template() - {$get_query_template_time_avg}\nnew_get_query_template() - {$new_get_query_template_time_avg}\n\nChange: {$percentage}%%\n" );