Data locality (sometimes) beats algorithmic complexity

I've been ECS -curious ever since I learned about it in the Bevy game engine documentation . The ECS architecture predictably improves performance in languages that give you low-level control over memory (C, C++, Rust, Zig, and friends). But how does it fare when used in high-level, dynamic, garbage-collected languages such as JavaScript? This is the question Dan Murphy set out to answer in The Physics of Memory : Is it possible to use an ECS-style architecture in Javascript? And for applicable operations,