https://portfolio-souravkhan.vercel.app/blog Portfolio of Sourav Khan, a goal-driven Software Engineer building sleek, scalable, modern web experiences with React, Next.js, Node.js, and C++. Located in Ambala, India. en-us © 2026 Sourav Khan Wed, 26 Aug 2026 00:00:00 GMT https://portfolio-souravkhan.vercel.app/blog/making-images-and-video-fast https://portfolio-souravkhan.vercel.app/blog/making-images-and-video-fast Images are the heaviest thing on most pages, and the standard advice can make them slower. The format rules, the srcset maths, and the lazy-loading trap. Wed, 26 Aug 2026 00:00:00 GMT performance images video html browsers https://portfolio-souravkhan.vercel.app/blog/making-web-fonts-fast https://portfolio-souravkhan.vercel.app/blog/making-web-fonts-fast A web font can hide your text for three seconds before a single word renders. What font-display really controls, and why preload is the second fix, not the first. Wed, 26 Aug 2026 00:00:00 GMT performance fonts css html browsers https://portfolio-souravkhan.vercel.app/blog/what-is-an-agent-harness https://portfolio-souravkhan.vercel.app/blog/what-is-an-agent-harness An LLM can't open a file, run a test, or fix its own mistake. The harness is the loop that lets it — here's the whole cycle, with a playground you can pull apart. Tue, 25 Aug 2026 00:00:00 GMT ai agents llm developer-tools architecture https://portfolio-souravkhan.vercel.app/blog/http-1-vs-http-2-vs-http-3 https://portfolio-souravkhan.vercel.app/blog/http-1-vs-http-2-vs-http-3 Switching to HTTP/2 can make mobile slower. The reason sits one layer below HTTP, in a place your server config can't see — and it's also why HTTP/3 isn't the free upgrade everyone assumes. Fri, 31 Jul 2026 00:00:00 GMT http networking performance quic https://portfolio-souravkhan.vercel.app/blog/how-browser-rendering-works https://portfolio-souravkhan.vercel.app/blog/how-browser-rendering-works Move one script tag into the head and a working DOM lookup starts returning null. The full path from raw bytes to painted pixels, and where JavaScript cuts into it. Thu, 30 Jul 2026 00:00:00 GMT browsers performance html css javascript