Next.js 16.1 File System Caching: 10x Faster Dev Startup
Every time I restarted the dev server on our main application, I'd wait 12-15 seconds. Open laptop, run npm run dev, wait. Switch branches, restart, wait. After...
All posts tagged with #performance
Every time I restarted the dev server on our main application, I'd wait 12-15 seconds. Open laptop, run npm run dev, wait. Switch branches, restart, wait. After...
I spent years wrapping components in React.memo, optimizing callbacks with useCallback, and caching expensive computations with useMemo. It became muscle memory...
Our Next.js build took 8 minutes. After migrating to Turbopack in Next.js 16, it takes 2 minutes and 40 seconds. That's a 3x improvement with zero code changes....
Our product pages had a problem: 80% of the content was static (product info, images, descriptions) but 20% was dynamic (inventory, pricing, recommendations). I...
Our image editor's blur filter took 3 seconds on a 4K image in JavaScript. After porting it to WebAssembly, it runs in 180ms. That's not a typo 16x faster. WebA...
We built our documentation site in Next.js because that's what we knew. Then we discovered Astro shipped our 200-page docs with 12KB of JavaScript. The Next.js ...
Our API endpoint in us-east-1 served users in Singapore with 280ms latency. After moving to Vercel Edge Functions, the same endpoint responds in 12ms from Singa...
Our e-commerce category page had 48 product links. In Next.js 15, hovering triggered prefetching that downloaded 2.4MB of JavaScript and data the full page payl...
After profiling our e-commerce site, I found users waited 3.2 seconds for the "Add to Cart" button to become interactive. The culprit was React's hydration down...
Our admin dashboard had grown to 450KB of JavaScript. Users on slower connections waited 4+ seconds for interactive elements. After experimenting with htmx alon...
Six months ago, our React application felt sluggish despite aggressive optimization. Users complained about jarring loading states, crashes that took down entir...
Three weeks ago, our SaaS dashboard was failing Core Web Vitals. Users complained about sluggish navigation, and our TTFB averaged 1.2 seconds. After implementi...
Last year, our photo editing SaaS was choking on high-resolution images. Users uploaded 50MB RAW files expecting instant previews, but our JavaScript-based proc...
Last month, I completed migrating our production e-commerce platform from React 18 to React 19 Server Components. The results shocked even me - our JavaScript b...
Our React application was hemorrhaging performance. Initial bundle size hit 2.3MB, First Contentful Paint averaged 8.2 seconds on mobile, and users were abandon...
When our React application grew to over 500 components and 2.5MB of JavaScript, I learned that code splitting isn't just an optimization it's essential for main...
After migrating 15+ production applications between different Next.js rendering strategies, I've learned that choosing between SSR, SSG, and ISR isn't just abou...
Last year, I migrated three different production applications from manual data fetching to dedicated libraries - one used React Query (now TanStack Query), one ...
After implementing performance monitoring across dozens of applications from small startups to enterprise platforms serving millions of users I've learned that ...
After migrating three production applications to React 19's Server Components, I've learned that the biggest challenge isn't understanding the technical differe...
Last week, I spent three days hunting down a memory leak that was causing our React application to slow to a crawl after just 30 minutes of use. The culprit? A ...
Three months ago, I made a decision that initially scared me: migrating our production React application from Redux to Zustand. We had over 50 Redux slices, 200...
Last month, I reduced our Next.js application's server costs by 60% and improved page load times by 80%. The secret? Understanding and properly implementing Nex...
For six months, I ran the same application logic on both Edge Functions and traditional Serverless Functions across five different providers. The results challe...
Six months ago, our e-commerce site was hemorrhaging users due to poor performance. Our Core Web Vitals were in the red: LCP at 4.2 seconds, CLS at 0.31, and IN...
For 18 months, I've been conducting a real-world experiment across 12 different projects, systematically comparing CSS-in-JS solutions (styled-components, Emoti...
React 19 landed in December 2024, and after migrating three production applications to the new version, I've experienced firsthand how this release fundamentall...
After optimizing images for a media-heavy e-commerce site with 50,000+ product photos, I reduced our LCP from 4.2s to 0.8s using techniques that go far beyond N...
After running both Vercel Analytics and Google Analytics on the same applications for 8 months, I discovered they serve completely different purposes. Here's th...
After optimizing fonts for dozens of high-traffic websites, I reduced font-related layout shifts by 95% and improved LCP by an average of 400ms. Here's the comp...
After building and maintaining over 30 APIs in production from simple CRUD services to complex data aggregation platforms I've learned that choosing between RES...