Overview
Paint & Layout Timing walks frontend engineers through repeatable diagnostics for rendering issues. You profile real applications, document baselines, and ship improvements with mentor review at each checkpoint.
Included
- Chrome DevTools performance panel walkthroughs
- Baseline capture templates for your codebase
- Weekly mentor review on profiling artifacts
- Pair debugging sessions in live lab hours
- Checklist for regression guardrails
- Shared artifact library from prior cohorts
- Post-cohort office hour (30 days)
Outcomes
- Produce a profiling report stakeholders can read
- Prioritize fixes using signal, not guesswork
- Ship one measurable improvement to production metrics
Ji-woo Han
Lead lab mentor focused on rendering diagnostics and cohort facilitation.
FAQ
What tools do I need?
A modern laptop, Chrome, and access to a repo you can profile. Node 20+ recommended.
Is production deployment included?
No. We focus on measurement and patch design; your team owns deployment windows.
Can I join mid-cohort?
Enrollment closes at start date. Late joins are not available for this format.
Reviews
"The Paint & Layout Timing flame chart exercises finally made INP regressions click. I still use the week-2 capture sheet."
"Mentor notes on my bundle treemap were blunt and useful. Wanted one more session on Safari quirks."