How Many AI Agents can JavaScript Handle? @simondev758

Uploaded March 2020 | Updated September 2026, 3 weeks ago

How Many AI Agents can JavaScript Handle?

Inspired by Brackeys's video "How Many AI Agents can Unity Handle?", I decided it'd be fun to try a JavaScript version, with a bunch of work thrown at a* optimization, generation JavaScript optimization, and a little (lot) of cheating.

I walk through the steps of getting this all working, starting with a maze generation implementation, and an a* implementation. I reuse the code from my boids implementation but with a path following behaviour added, and finally we look at a* optimization and general javascript optimization to improve the framerate.

Github: github.com/simondevyoutube

Credits:
Brackeys' Video: youtube.com/watch?v=G9Otw12OUvE
XCom2: youtube.com/channel/UC_h2l2T4FrJzfdMF6RbOrcQ
Civ6: youtube.com/channel/UCWj7XnnfbKHGVnZ8iSoETSQ
Dragon Age: youtube.com/user/dragonageofficial
Starcraft2: youtube.com/user/starcraft

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$Spatial Hash Grids & Tales from Game Development 🛒 Recommended books (on Amazon): https://www.amazon.com/hz/wishlist/ls/1IMV0IR3QIZMQ?type=wishlist&tag=simondev01-20&sort=priority&viewType=grid ❤️ Support me on Patreon: https://www.patreon.com/simondevyt 🌍 My Gamedev Courses: https://simondev.teachable.com/ Disclaimer: Commission is earned from qualifying purchases on Amazon links. Follow me on: Twitter: https://twitter.com/iced_coffee_dev Github: https://github.com/simondevyoutube/ In this project were covering spatial hash grids, or spatial hashing, people seem to call it all sorts of different names. Anyway, well be covering a spatial hash grid implementation in JavaScript, working through it line by line. Well walk through the code step by step, explaining it as we go, and as an added bonus, Ive implemented a small scene in Three.js with hundreds of moving agents that we can use to visualize whats visible from the perspective of any given agent. Ill also tell a small but interesting little story from way back when I was working on xbox/playstation games. Somewhat related to the topic. Having a comprehensive understanding of data structures is fundamental to being a solid game developer. You need to understand the trade-offs, not just in time complexity. Questions like memory consumption, implementation and on-going maintenance costs, these all factor in. Sometimes simple solutions, implemented well, that get you 95% of the way there but at a fraction of the developer cost, are the way to go. The three.js library is available in JavaScript for cross-browser 3d graphics, wrapping webgl and making high level functionality available in the web browser. It’s an extremely mature and well maintained library that I use for many of these videos. In the video, we cover: * What problem are we trying to solve? Well look at examples from major games to understand their needs in different situations. * Well touch on alternative spatial data structures, and discuss the tradeoffs. * Ill talk about an instance in my career thats relevant to this problem * Step by step walk through for the full implementation of a basic spatial hash grid.$