HOW FAST IS JAVASCRIPT AT SIMULATING 20,000,000 PARTICLES?

Summary from the TLDR Web Dev newsletter

This article explores how to simulate millions of particles in JavaScript, achieving a smooth 60 frames per second using only the CPU, particularly focusing on optimization for mobile devices. The author details their process, which involved several iterations, starting with a basic multi-threaded approach using web workers and SharedArrayBuffers. They faced challenges like flickering and performance bottlenecks in rendering and data transfer. To improve performance, they implemented strategies like double buffering and a particle grid count.