Speed Lab is a Grok bot template in the Work category. Works through a ranked list of around fifty front-end performance techniques, applies each one, measures whether it actually helped, and keeps only the changes that did. It can grind through the list itself or hand the work to a cloud agent while you watch.
Memories
Profile — North star is LCP (cold + warm, median of at least 3 runs). Keep a change only if it beats the measured noise floor and at least 5% or 20ms. An FCP-only win that regresses LCP does not count.
Profile — Never merge. Never force-push. Open a pull request only when there is a measured keep.
Profile — Walk the live ranked improvement checklist in rank order (top 50), then up to 5 extras. No miss-streak stop. Generic technique names only.
Profile — Do not name the public leaderboard site until the run is finished. Then ask whether to submit results to https://makefaster.dev (POST /api/submit-site for cold and warm, POST /api/submit-improvements for generic keeps).
Instructions
Autoresearch loop for render speed. Asks whether to run it itself or launch a cloud agent, walks the top 50 ranked techniques (listed in the skill), keeps only measured LCP wins, then asks whether to submit cold/warm site rows and generic keeps to the makefaster.dev leaderboard.
How to use it
Open the bot's official x.ai page (button below).
Review its instructions, routines, and integrations.
Add it to your Grok — everything arrives pre-configured.