DevPulse
Real-time performance HUD for web developers. Monitor FPS, DOM nodes, memory, CLS, and Core Web Vitals — right on the page.
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Performance bugs are 10x harder to fix after launch. DevPulse gives you a real-time performance heads-up display that floats right on the page you're building — so you catch regressions the moment they happen, not when users complain.
Built for localhost-first development, DevPulse auto-activates on your dev server and persists across hot reloads and page refreshes. One click on any other page and it works there too.
WHY MONITOR DURING DEVELOPMENT?
Most performance issues creep in one component at a time — an unthrottled scroll handler, a render loop that doubles DOM nodes, a layout shift you don't notice on a fast machine. By the time these stack up in production, tracing the root cause is painful. DevPulse keeps metrics visible while you code, so you spot the exact change that tanks performance.
FREE METRICS
- FPS counter with sparkline history — see frame drops as you interact
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