felixarntz

Mini WordPress core server performance test suite

Purpose

This quick "mini test suite" allows you to easily collect server-side performance metrics for WordPress core development. It does so by utilizing the Server-Timing header.

Usage

1. Paste the code from main.php into pretty much anywhere in WordPress core, e.g. into wp-includes/default-filters.php.
2. Use code like the one in example.com around any code or a specific function that you want to record metrics for.

felixarntz

<?php
add_action(
	'plugins_loaded',
	function() {
		// Utility function that returns a measuring callback for an action hook,
		// which should be registered as a metric within the action as early as possible
		// (see PHP_INT_MIN usage below).
		$get_measure_action_callback = function( $action_hook ) {
			return function( $metric ) use ( $action_hook ) {
				$metric->measure_before();

felixarntz

<?php
add_action(
	'perflab_server_timing_init',
	function( $server_timing ) {
		// Utility function that returns a measuring callback for an action hook.
		$measure_action = function( $action ) {
			return function ( $metric ) use ( $action ) {
				$start_time = null;

				// If action is already running, at least measure the remainder.

felixarntz

<?php
/**
 * Plugin initialization file
 *
 * @wordpress-plugin
 * Plugin Name: Lazyload LCP Fix
 * Plugin URI:  https://gist.github.com/felixarntz
 * Description: Omits the first content image from being lazy-loaded, to improve LCP performance.
 * Version:     1.0.0
 * Author:      Felix Arntz, Google

felixarntz

<?php
/**
 * Ensures Site Kit ignores contextual home URL path modifications added by certain multilingual plugins.
 *
 * @author    Felix Arntz, Google
 * @license   Apache 2.0
 * @copyright 2020 Google Inc.
 *
 * @wordpress-plugin
 * Plugin Name: Fix Site Kit Canonical Home URL Multilingual

felixarntz

const { useSelect } = window.googlesitekit.data;
const {
	registerWidget,
	WIDGET_WIDTHS,
} = window.googlesitekit.widgets;

function CustomAnalyticsWidget( props ) {
	const {
		Widget,
		WidgetNull,

felixarntz

<?php
/**
 * Temporary fix Site Kit opcache_reset call, in case the function is not defined.
 *
 * @author    Felix Arntz, Google
 * @license   Apache 2.0
 * @copyright 2020 Google Inc.
 *
 * @wordpress-plugin
 * Plugin Name: Site Kit Fix Opcache Call (temporary)

felixarntz

<?php
/**
 * Clear OpCache Simple.
 *
 * @author    Felix Arntz, Google
 * @license   Apache 2.0
 * @copyright 2020 Google Inc.
 *
 * @wordpress-plugin
 * Plugin Name: Clear OpCache Simple

felixarntz

.color-accent,.color-accent-hover:hover,.color-accent-hover:focus,.has-accent-color,.has-drop-cap:not(:focus):first-letter,.wp-block-button.is-style-outline,a { color: #c13030; }blockquote,.border-color-accent,.border-color-accent-hover:hover,.border-color-accent-hover:focus { border-color: #c13030; }button:not(.toggle),.button,.faux-button,.wp-block-button__link,.wp-block-file__button,input[type="button"],input[type="reset"],input[type="submit"] { background: #c13030; }.bg-accent,.bg-accent-hover:hover,.bg-accent-hover:focus,.has-accent-background-color,.comment-reply-link,.edit-comment-link { background-color: #c13030; }.fill-children-accent,.fill-children-accent * { fill: #c13030; }button,.button,.faux-button,.wp-block-button__link,.wp-block-file__button,input[type="button"],input[type="reset"],input[type="submit"],.comment-reply-link,.edit-comment-link { color: #ffe8e8; } { background: #ffe8e8; }body,.entry-title a { color: #000000; }cite,figcaption,.wp-caption-text,.post-meta,.entry-content .wp-block-arc

felixarntz

/*
 * Set background for:
 * - featured image :before
 * - featured image :before
 * - post thumbmail :before
 * - post thumbmail :before
 * - Submenu
 * - Sticky Post
 * - buttons
 * - WP Block Button