Ever wondered how regex works under the hood? How does it understand an incantation like “<\/?[\w\s]*>|<.+[\W]>” and magically produces a desired result? This 3 parts serie is going to describe exactly how it works and how to implement a feature-rich regex engine.

If you used Docker in dev, prod or share files among a few containers, access file on host, you will know this pain. We will learn about a few solutions and use case to fix file permission.

Engineering leaders at Datadog, Braze, and BetterUp discuss container tools, testing, and monitoring, and how they’ve approached container migrations

This guide is intended to help you gain a true understanding of SQL query speeds. It includes research that demonstrates the speed of slow and fast query types. If you work with SQL databases such as PostgreSQL, MySQL, SQLite, or others similar, this knowledge is a must.

A technique to inject application response headers into Nginx log, and clean it up so client won’t see it and we still be able to trace and grep log with those particular headers

EXPLAIN ANALYZE is the key to optimizing SQL statements in PostgreSQL. This article does not attempt to explain everything there is to it. Rather, I want to give you a brief introduction, explain what to look for and show you some helpful tools to visualize the output.

An obscure quirk of the /proc/*/mem pseudofile is its “punch through” semantics. Writes performed through this file will succeed even if the destination virtual memory is marked unwritable. This behavior raises some questions: Is privileged code subject to virtual memory permissions? In general, to what degree can the hardware inhibit kernel memory access?

Today, we can find elliptic curves cryptosystems in TLS, PGP and SSH, which are just three of the main technologies on which the modern web and IT world are based. Before ECC become popular, almost all public-key algorithms were based on RSA, DSA, and DH, alternative cryptosystems based on modular arithmetic. And the foundations of ECC are still a mystery to most. In this we have this link to dive into ECC, and another great one Elliptic Curve Cryptography: a gentle introduction

Web developers have come to expect little to no performance impact when debugging their code. However, this expectation is by no means universal. A C++ developer would never expect a debug build of their application to reach production performance, and in early years of Chrome, simply opening DevTools significantly impacted the performance of the page. This post laid out what Chrome team did to improve their

Exploring stacking contexts, one of the most misunderstood mechanisms in CSS.