Jake Archibald

Archibald tested avifenc, libjxl, jixel and cwebp on an M4 Pro, scoring with SSIMULACRA2. JPEG XL lost on lossy photos and screenshots (30-90% larger), but dominated lossless and can recompress existing JPEGs 9-20% smaller.

Commenters disputed whether the benchmark or Chrome's earlier decision was the real story.

His demos, built with Claude, include a markdown notes app and a node-based video compositor, all editing real local files in-page. The trick is window.showDirectoryPicker(), which lets the user's own cloud-synced folder become the sync layer. The catch the post skips: all three editors of the draft spec are Google engineers, and Jake Archibald showed up to debunk the demo's scariest fear.