My last post on the Rust compiler’s performance was two months ago and a lot has happened since then. Overall progress The measurements for the period 2026-07-29 to 2026-09-28 can be seen here. The mean wall-time reduction was 4.57%, which … Read more
Relativity Park: Walking Speed of Light Special relativity with c = 5 km/h Field guide (Help) H Settings Tab Your velocity 0.00km/h β: v / c 0.0000 γ: Lorentz factor 1.000 Lengths ahead × 1.0000 Doppler at crosshair 1.000 at … Read more
It is common knowledge among Wi-Fi professionals that using 20 MHz or 40 MHz channel widths when planning 5 GHz networks offers the best overall experience for enterprise networks. This is because enterprise networks can often cover large footprints and … Read more
Guiding principles Our network evolution has been guided by a few key principles: Anything, anywhere: Our data center networks support efficiency and simplicity by allowing large-scale jobs to be placed anywhere among 100k+ servers within the same network fabric, with … Read more
I’m often asked two very natural and related questions. Why is the speed of light, usually denoted c, so astonishingly fast? Why, in Einstein’s famous equation relating energy and mass — E=mc2 — does c2, a gargantuan number, appear? It’s … Read more
Rubik’s cube My speed cubing page This is a copy of Ernö Rubik’s signature as it appears in my notebook. He signed it at the World Championship in Budapest in 1982 This system for advanced cubers and is not appropriate … Read more
It has been five months since my last general update on the Rust compiler’s performance. Let’s see what has happened in that time. Big wins Let’s start with some big improvements. The information about metrics at the top of this … Read more
Shorter build times improve developer productivity. Therefore, it is benefitial to reduce them if possible. This document explains why compilation can be slow and discusses different approaches to speed it up. This is mostly meant to be a resource for … Read more
Generally we associate speed with positive outcomes. Being ‘fast’ is perceived as good; being ‘slow’ is perceived as bad. Quiz shows demonstrate the benefits of fast thinking – speedy responses win prizes, while hesitation costs points. In most careers, including … Read more
Quickly learn if a site speed change will have a positive impact, without hassling your dev team. Improving site speed can be complicated. It’s surprisingly common to roll out a change that should lead to a performance improvement, only to … Read more