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Performance plugin from the WordPress Performance Group, which is a collection of standalone performance modules.

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## Feature Description _Originally discussed in https://github.com/WordPress/performance/pull/1697#discussion_r1876359857._ The Image Prioritizer plugin is capturing LCP element information independent of the elements which are explicitly tracked for capturing in the `elements` of...

[Type] Enhancement
Needs Discussion
[Plugin] Optimization Detective
[Plugin] Image Prioritizer

## Feature Description As suggested by @swissspidy in https://github.com/WordPress/performance/pull/730#discussion_r1195060190: > I can also highly recommend https://packagist.org/packages/swissspidy/phpstan-no-private to catch calls of seemingly private functions. Nevertheless, I noted: > I love this...

[Type] Enhancement
Infrastructure
[Plugin] Performance Lab

This epic is to track speculative loading support in WordPress Core. This functionality has been available in the [Speculative Loading plugin]() for several months now, and is being proposed for...

[Issue] Overview
[Type] Epic

Currently, each plugin handles JavaScript and CSS minification through individual Webpack configurations. This approach requires manual updates to `CopyWebpackPlugin` patterns whenever new assets are added or renamed, creating unnecessary maintenance...

Infrastructure

## Summary Fixes https://github.com/WordPress/performance/issues/1603 ## Relevant technical choices The following files have been formatted by using `npm run format-js` Note: .yml and .json files were not ignored to ensure they...

[Type] Bug
no milestone

When I run `npm run format-js` it ends up formatting more files than I expected: ``` $ npm run format-js > format-js > wp-scripts format .eslintrc.js 29ms .github/dependabot.yml 20ms .github/workflows/codeql-analysis.yml...

[Type] Bug
Good First Issue

## Feature Description If an image is visible in one breakpoint but not another, it should be loaded conditionally. If an image lacks `loading=lazy`, however, it is loaded unconditionally. Nevertheless,...

[Type] Enhancement
[Plugin] Optimization Detective
blocked

## Summary Fixes # ## Relevant technical choices * Allows accessing the `$start_value` property (formerly called `$before_value`) of Server-Timing metrics via new methods. * Modifies that `$start_value` property to now...

[Type] Enhancement
no milestone
[Plugin] Performance Lab

Configures GitHub Copilot coding agent instructions per [best practices documentation](https://gh.io/copilot-coding-agent-tips). ## Changes - Added `.github/copilot-instructions.md` with concise guidance for Copilot: - Project structure and monorepo layout - WordPress coding standards...