u/Better_Pirate_7823in r/gameenginedevs • Recommends
Parallelizing the physics solver by Dennis Gustafsson (Teardown) (2025)
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#physicsengine#parallelization#spinlocks
Dennis Gustafsson – Parallelizing the physics solver – BSC 2025
Better Software Conference
32K subscribers • 7 videos on Hallway
- Recommended by 4 people: 2 on Hacker News, 1 on Lobsters and 1 in engineering communities.
- Presented by Dennis Gustafsson, creator of Teardown
Advanced. Deep dive for people who know the field.
77K views1 year ago4 recommendations
Game developmentSystems programmingGame programmingConcurrency and parallelismPerformance and optimization
Dennis Gustafsson explains how he parallelized the real-time physics solver for his game engine using custom synchronization techniques.
Dennis Gustafsson's talk at BSC 2025 about parallelizing the physics solver in for an upcoming game. Dennis' links: - voxagon.se/ - x.com/voxagonlabs/ - teardowngame.com/ BSC links: - BetterSoftwareConference.com/ - x.com/BetterSoftwareC - twitch.tv/BetterSoftwareConference/ Chapters: Talk Q&AWhy it's here
4 people recommend thisWhat people say. Recommended as an insightful look into optimizing and parallelizing a real-time physics engine using spinlocks.
fasterikon Hacker News • Recommends
On “Spinning around: Please don't – Common problems with spin locks”
As always: use standard libraries, profile, then write your own if the data indicates it's necessary. The following is an interesting talk where the author used a spinlock to speed up a real-time physics solver significantly. Dennis Gustafsson – Parallelizing the physics solver – BSC 2025 link to this video
Hikikomorion Hacker News • Recommends
On “The unlikely story of Teardown Multiplayer”
Not about multiplayer but still interesting. Dennis Gustafsson – Parallelizing the physics solver – BSC 2025 link to this video
levodelellison Hacker News • Mentions
On “Futurelock: A subtle risk in async Rust”
From my understanding this talk describes how he implemented a solution for a similar problem link to this video I'm saying if you're not writing multi-threaded code everyday, use a library. It can use atomics/locks but you shouldn't use it directly. If the library is designed well it'd be impossible to deadlock.