Performance

Performance optimization and analysis

Performance tools focus on the measurable layer of web performance: Lighthouse score interpreters that explain which signal a metric came from, Core Web Vitals reference cards with Google's current thresholds, image-loading strategy pickers (eager vs lazy vs decoding async), bundle-size analyzers from a paste of webpack-stats.json, critical-CSS extractors, third-party script audit checklists. Useful when you're trying to move a real-world page from "Lighthouse 60s" to "Lighthouse 90s" and need to know which knob actually matters for your specific bottleneck. None of it replaces Chrome DevTools, but a lot of it removes round-trips for "what does this metric mean?" type questions.