Hi!

Welcome to this space where I share learnings about different topics related to the Front-end world, especially Web Performance.

Recent Posts

• Keep-Alive is not Cache-Control: anatomy of a network waterfall

  Published:2 jul 2026

  A real audit case: two heavy images (608 KB and 403 KB) over HTTP/1.1 with Connection: Keep-Alive but no Cache-Control. Why they are different things, what HTTP/2 fixes and how preconnect gets ahead of the handshake. With an interactive waterfall demo.

• The mystery of the self-repainting #document: Paint flashing and composited layers

  Published:21 jun 2026

  Why the #document layer racks up hundreds of repaints at rest because of a ticker animated with transform, how to catch it with the Layers tab and Paint flashing, and how to promote the element to its own composited layer with will-change.

• Antigravity Skills: advanced YAML frontmatter configuration

  Published:13 jun 2026

  The kind, model, temperature, max_turns and tools fields in SKILL.md frontmatter let you precisely control how each agent runs in Antigravity. A practical guide to the extended fields that Google hasn't officially documented yet.

• Video editing in the browser with WebGPU

  Published:28 abr 2026

  WebGPU enables real-time video effects and transformations in the browser. Practical implementation with benchmarks and real-world limitations.