Performance

How high TTFB kills application responsiveness and some ideas to fix it you probably didn't know about

Discover how Infobip's infrastructure, which handles over 10 billion daily messages, evolved through a decade of challenges and innovation.

TypeScript is a superset of JavaScript that compiles to clean JavaScript output. - microsoft/TypeScript

Strategies for Graceful Degradation in Large Scale Distributed Systems

Making programs slower can be useful to find...

A very common side effect of working as a programmer is the constant frustration of not having source code access to all the software you use. Bugs, problems or missing features in your own work ca…

Every PostgreSQL backend process eats ~10 MB of RAM and can block autovacuum if it idles “in transaction.” Connection storms turn fast servers into sludge. PgBouncer, a tiny TCP proxy, multiplexes…

The multi-threaded frontend framework for ultra-fast, desktop-like enterprise web applications - neomjs/neo

I guess everyone who’s been in the programming world long enough has heard about this data structure at least once. Hash tables excel when you need rapid lookups, quick inserts, and fast deletions…

Learn how to evaluate runtime performance in Chrome DevTools.

If you have a good test suite, you may be able use pytest fixtures to identify memory and other resource leaks.

I am building 10MPage.com which captures the state of the internet in 2025. Every internet user is allowed to upload a small image of 64x64…

5 minutes to 11 seconds with Node.js is possible?

Because no one has time to wait for slow APIs in the age of instant gratification.

I was recently made maintainer of the json gem, and aside from fixing some old bugs, I focused quite a bit on its performance, so that it is now the fastest JSON parser and generator for Ruby on most benchmarks.

Performance chapter of the 2024 Web Almanac covering Core Web Vitals, with deep dives into the Largest Contentful Paint, Cumulative Layout Shift, and Interaction to Next Paint metrics and their diagnostics.

Learn how browser turn your code into functional website from high-level architecture to the specifics of the rendering pipeline.

Those of us who consider ourselves developers, including me, are very task-oriented. We like to be **guided towards optimal results**, and we find ourselves uncomfortable when there is no clear path to follow. That is why we all want to know how to do things; we like step-by-step tutorials and how-tos. However, such guidelines are based on certain theories, deep knowledge and experience. For this reason, I will not provide you, the reader, with a structured answer to the question of how to make a website faster. Instead, I aim to provide you with the **reasons and theories for why things function in certain way**. I will use examples that are observable in the offline world and, using principles of psychology, research and analysis in psychophysics and neuroscience, I will try to answer some “Why?” questions.

Understanding server-side waterfalls with RSCs and client-side waterfalls we're familiar with and why server-side waterfalls are probably better.

Have you ever wondered how the biggest services in the world, like AWS and Netflix, achieve single-digit millisecond response times…

Essay on the benefits of speedy software, and how it affects user perception of engineering quality and overall usability

How we rolled out zstandard and other improvements across our gateway cluster to reduce the amount of bandwidth that’s used by our clients.

Track data flowing through Java programs.

We'll walk through key configurations like Tiered Cache, Cache Reserve, and crafting specific cache rules, highlighting how these optimizations benefit Pillser's users.

Page Speed Insights and Lighthouse can't evaluate performance across your entire stack of services and apps. You need something more powerful: tracing.

What's the Difference Between Throughput vs. Latency? How to Use Throughput vs. Latency with AWS.