westonruter

<?php
/**
 * Cache WP AI Generate Responses Plugin for WordPress
 *
 * @package   CacheWpAiGenerateResponses
 * @author    Weston Ruter
 * @license   GPL-2.0-or-later
 * @copyright Copyleft 2026, Weston Ruter
 *
 * @wordpress-plugin

westonruter

This is combined list of CodeMirror v5 changes across all 76 releases (5.30.0 through 5.65.18) which are included in WordPress 7.0 due to #48456. Gathered by Claude Code with Opus 4.6.

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Bug fixes (282 items)

Core editor

• [5.65.16] Fix focus tracking in shadow DOM.
• [5.65.9] Add a workaround for a regression in Chrome 105 that could cause content below the editor to not receive mouse events.
• [5.65.8] Include direction override and isolate characters in the default set of special characters.

westonruter

--- before.txt	2026-02-28 11:28:52
+++ after.txt	2026-02-28 11:43:42
@@ -9,12 +9,6 @@
          string, false given.
          🪪  argument.type
          at src/wp-activate.php:40
-  55     Cannot call method get_error_code() on array|WP_Error.
-         🪪  method.nonObject
-         at src/wp-activate.php:55
-  58     Cannot call method get_error_code() on array|WP_Error.

westonruter

#!/bin/bash
# Put this file in the root of wordpress-develop and run it instead of `npm run build:dev`.
# Add paths as needed.

set -e
set -x

cd "$(dirname "$0")"
cd src/wp-includes/js

westonruter

Run on WordPress Playground

westonruter

#late-enqueued-style-info {
	position: fixed;
	bottom: 0;
	right: 0;
	padding: 1em;
}

westonruter

twentyten

npm run research -- benchmark-web-vitals --url=http://wp68.local/block-category-common/ --url=http://wp69.local/block-category-common/ --number=100 --network-conditions=broadband --diff --output=md

URL	http://wp68.local/block-category-common/	http://wp69.local/block-category-common/	Diff (ms)	Diff (%)
Success Rate	100%	100%	--	--
FCP (median)	194.75	181.15	-13.60	-7.0%
LCP (median)	300.4	294.9	-5.50	-1.8%
TTFB (median)	34.4	36.7	+2.30	+6.7%

westonruter

twentyten

npm run research -- benchmark-web-vitals --url=http://wp68.local/sample-page/ --url=http://wp69.local/sample-page/ --number=100 --network-conditions=broadband --diff --output=md

URL	http://wp68.local/sample-page/	http://wp69.local/sample-page/	Diff (ms)	Diff (%)
Success Rate	100%	100%	--	--
FCP (median)	170.3	161	-9.30	-5.5%
LCP (median)	201.1	191.1	-10.00	-5.0%
TTFB (median)	29.9	33.6	+3.70	+12.4%

westonruter

👉 Dev note published: WordPress 6.9 Frontend Performance Field Guide

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I'm working on a Dev Note which will detail all of the performance improvements in WordPress 6.9. See full list in Trac. In the mean time, here are a couple outlines:

Links below either point to a specific ticket or a Trac query for the group of tickets:

4-bullet highlights

westonruter

The two sites are running on LocalWP with PHP 8.2, MySQL 8, Nginx. They both have the theme unit test data installed. The Twenty Twenty-One theme is active. In the Customizer, the theme is configured to show full content instead of excerpts on archive pages.

benchmark-server-timing on Sample Page

npm run research -- benchmark-server-timing --url=http://wp68.local/sample-page/ --url=http://wp69beta4.local/sample-page/ --number=100 --diff --output=md

URL	http://wp68.local/sample-page/	http://wp69beta4.local/sample-page/	Diff (ms)	Diff (%)