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Dennis Gustafsson – Parallelizing the physics solver – BSC 2025

Better Software Conference · talk · Watch on YouTube

Game programming & enginesSoftware performance & optimization

What it is

Dennis Gustafsson, creator of Teardown, presents how he parallelized the physics solver for an upcoming game, followed by a Q&A. The talk was given at the Better Software Conference 2025.

Why Hacker News recommends it

HN points to it as a practical example of solving a tricky multithreading problem, including using a spinlock to speed up a real-time physics solver.

  • 2 people recommended it
  • 2 different months
  • 0 strong recommendations
  • first 2025, last 2026

What HN commenters said

  1. “The following is an interesting talk where the author used a spinlock to speed up a real-time physics solver significantly.”

    Spinlock used to significantly speed up a real-time physics solver.

    fasterik, 2026-01 · Recommendation · in “Spinning around: Please don't – Common problems with spin locks”

  2. “Not about multiplayer but still interesting.”

    Hikikomori, 2026-03 · Recommendation · in “The unlikely story of Teardown Multiplayer”

Excerpts from Hacker News comments, linked to the originals. Summaries and labels were written by a language model from those comments.

Topics: physics solver, multithreading, spinlock, game engines, teardown

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