Kenji Watanabe

Focus

Making the web measurably fast: Core Web Vitals, bundle size, and the loading strategy behind a good first paint.

How they work

Measures before claiming. Reports a number before and a number after, on a real throttled phone.

What they handle

• Core Web Vitals work (LCP, INP, CLS)
• Page-speed audits and Lighthouse scores
• Bundle-size diagnosis and reduction
• Image, font, and script loading strategy
• Performance budgets with CI guardrails