Felix Arntz
@flixos90 on WordPress.org and Slack
Bio
Interests
Contributions Sponsored
- Member Since: November 28th, 2012
- Location: San Francisco, USA
- Website: felix-arntz.me
- GitHub: felixarntz
- Job Title: Senior Software Engineer
- Employer: Google
Contribution History
Felix Arntz’s badges:- Core Contributor
- Core Performance Contributor
- Core Performance Team
- Core Team
- Documentation Contributor
- Meta Contributor
- Plugin Developer
- Translation Contributor
- Translation Editor
- WordCamp Organizer
- WordCamp Speaker
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Pull request #69578 merged into WordPress/gutenberg:
Include blocks manifest build process in Webpack config to fix `create-block` bug... -
Wrote a comment on the post More efficient block type registration in 6.8, on the site Make WordPress Core:
Thanks! Per my above reply, a fix for this bug is being worked on, see… -
Wrote a comment on the post More efficient block type registration in 6.8, on the site Make WordPress Core:
Thanks for sharing! This is a bug that was reported in https://github.com/WordPress/gutenberg/issues/69565, and a fix… -
Submitted pull request #69578 to WordPress/gutenberg:
Include blocks manifest build process in Webpack config to fix `create-block` bug... -
Wrote a new post, Core Performance Team Reps for 2025: Submit Your Votes, on the site Core Performance:
With the Core Performance Team Reps call for nominations now closed, it's time for voting!… -
Wrote a new post, More efficient block type registration in 6.8, on the site Make WordPress Core:
WordPress 6.8 introduces a new function wp_register_block_types_from_metadata_collection(), which allows plugins to register multiple block types… -
Created issue #69552 in the WordPress/gutenberg repository:
Run Interactivity API actions asynchronously unless they're using `withSyncEvent()` -
Closed issue #64944 on the WordPress/gutenberg repository:
Introduce `withSyncEvent` and require Interactivity API actions that use the `event` object... -
Merged pull request #69446 into WordPress/gutenberg:
Enhance create-block package to support blocks manifest and relevant Core APIs by... -
Closed ticket #62319 on Core Trac:
There is a flash when clicking the template name in the editor if a ... -
Committed [59951] to Core SVN:
Editor: Fix unexpected behavior due to conflicting custom block ... -
Wrote a new post, Speculative Loading in 6.8, on the site Make WordPress Core:
WordPress 6.8 introduces speculative loading, which can lead to near-instant page load times by loading… -
Merged pull request #69445 into WordPress/gutenberg:
Update docs about wp-scripts build-blocks-manifest in relation to new WordPress 6.8 function -
Submitted pull request #69446 to WordPress/gutenberg:
Enhance create-block package to support blocks manifest and relevant Core APIs by... -
Submitted pull request #69445 to WordPress/gutenberg:
Update docs about wp-scripts build-blocks-manifest in relation to new WordPress 6.8 function -
Closed ticket #63027 on Core Trac:
Block type path normalization is inconsistent (e.g. for Windows) -
Committed [59938] to Core SVN:
Editor: Fix block type and block metadata collection registration ... -
Received props from @JeffPaul in Slack:
Props to @joemcgill @desrosj @michelleames @Mamaduka @bph @beryldlg @krupajnanda @johnbillion @zunaid321 @narenin @wplmillet @sourabhjain @sukhendu2002… -
Closed issue #1881 on the WordPress/performance repository:
Modern Image Format no crop, if crop is array -
Merged pull request #1887 into WordPress/performance:
Fix Modern Image Format not cropping image if crop is an array -
Committed [3250544] to Plugins SVN:
Update to version 0.5.0 from GitHub -
Closed ticket #39242 on Core Trac:
Add caching to count_user_posts() -
Created ticket #63045 on Core Trac:
Add caching to `count_many_users_posts()` -
Closed pull request #8026 on WordPress/wordpress-develop:
Experiment with cross-document view transitions in Twenty Fifteen theme -
Closed ticket #63032 on Core Trac:
Adjust speculative loading selector exclusions to allow for classes to ... -
Committed [59881] to Core SVN:
General: Allow speculative loading opt-out CSS classes to be applied ... -
Submitted pull request #8428 to WordPress/wordpress-develop:
Allow speculative loading exclusion classes to be specified on parent element -
Created ticket #63032 on Core Trac:
Adjust speculative loading selector exclusions to allow for classes to ... -
Submitted pull request #8417 to WordPress/wordpress-develop:
Fix block type registration bugs on Windows by correctly normalizing paths -
Closed ticket #62267 on Core Trac:
Allow registering block type collections with a single function call -
Committed [59874] to Core SVN:
Editor: Allow registering block type collections with a single ... -
Merged pull request #1845 into WordPress/performance:
Improve Test Coverage for Speculation Rules Plugin -
Merged pull request #1883 into WordPress/performance:
Add support for Speculative Loading WP Core API, loading the plugin's own... -
Created ticket #63027 on Core Trac:
Block type path normalization is inconsistent (e.g. for Windows) -
Mentioned in [59872] on Core SVN:
Themes: Allow pattern files to be organized into sub-folders. -
Closed pull request #4006 on WordPress/wordpress-develop:
Backwards compat - #56689 -
Closed ticket #56689 on Core Trac:
Use WP_Query in get_page_by_path -
Closed ticket #54356 on Core Trac:
Determine and apply best default quality settings for WebP images -
Closed ticket #49278 on Core Trac:
Improve meta query -
Closed ticket #56349 on Core Trac:
Update WordPress core functions to support multiple MIME types -
Closed ticket #34676 on Core Trac:
Optimize bulk plugin updates -
Wrote a new post, Performance Chat Summary: 25 February 2025, on the site Make WordPress Core:
The full chat log is available beginning here on Slack. Announcements / Reminders Core Performance… -
Pull request #865 merged into WordPress/plugin-check:
Fix incorrect database tables being referenced on subsites in Multisite -
Closed issue #1144 on the WordPress/performance repository:
Add URLPattern tests for Speculative Loading -
Closed issue #1156 on the WordPress/performance repository:
Entirety of speculation rules should be filterable, not just the paths to... -
Submitted pull request #1883 to WordPress/performance:
Add support for Speculative Loading WP Core API, loading the plugin's own... -
Closed pull request #7899 on WordPress/wordpress-develop:
Explore using the Popover API in Twenty Fifteen theme -
Closed pull request #8131 on WordPress/wordpress-develop:
Explore view transitions in Twenty Fifteen for post title and featured image... -
Submitted pull request #8370 to WordPress/wordpress-develop:
Add view transitions theme support in abstracted way with sensible defaults -
Merged pull request #68097 into WordPress/gutenberg:
Introduce `withSyncEvent` action wrapper utility and proxy `event` object whenever it is...
Developer
-
AI Services
Active Installs: 40+
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Attachment Taxonomies
Active Installs: 900+
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Block Areas
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Bootstrap for Contact Form 7
Active Installs: 10,000+
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Fast Smooth Scroll
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Flush Transients
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Location Taxonomy
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Native Lazyload
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Relevant Social URL
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Share Target
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Site Kit by Google - Analytics, Search Console, AdSense, Speed
Active Installs: 4+ million
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Snow Fall
Active Installs: 60+
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WP-API JSON Feed
Active Installs: 40+
Contributor
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Lazy Loading Feature Plugin
Active Installs: 500+
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WP Multi Network
Active Installs: 100+
Support Rep
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Performance Lab
Active Installs: 100,000+
Plugins
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Akismet Anti-spam: Spam Protection
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AMP
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Co-Authors Plus
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Complianz - GDPR/CCPA Cookie Consent
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Contact Form 7
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Dark Mode Toggle Block
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Easy Digital Downloads – eCommerce Payments and Subscriptions made easy
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Edit Author Slug
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ElasticPress
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Email Template Designer - WP HTML Mail
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Equalize Digital Accessibility Checker - Audit Your Website for WCAG, ADA, and Section 508 Accessibility Errors
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Gmail SMTP
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HyperDB
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Keyring
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MultilingualPress
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One Click Demo Import
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Perfect Images
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Perfecty Push Notifications
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Plugin Detective - Troubleshooting Conflicts
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Query Monitor - The developer tools panel for WordPress
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Rate
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Redis Object Cache
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Regenerate Thumbnails
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SportsPress - Sports Club & League Manager
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Stream
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Subtitles
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SyntaxHighlighter Evolved
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The SEO Framework – Fast, Automated, Effortless.
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WP Event Calendar
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WP Multi Network
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WP Redis
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WP Spider Cache
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WP User Activity
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WP User Profiles
Deutsch (German) Plugins Translation Editor - #de_DE
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AI Services
Active Installs: 40+
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AMP
Active Installs: 500,000+
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Attachment Taxonomies
Active Installs: 900+
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Bootstrap for Contact Form 7
Active Installs: 10,000+
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GiveWP – Donation Plugin and Fundraising Platform
Active Installs: 100,000+
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Snow Fall
Active Installs: 60+
-
WP User Activity
Active Installs: 300+
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WP User Profiles
Active Installs: 400+
Español de Perú (Spanish (Peru)) Plugins Translation Editor - #es_PE
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AI Services
Active Installs: 40+
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Snow Fall
Active Installs: 60+