Uploaded June 2025 | Updated September 2026, 1 hour ago

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In this video, we explore how to build a custom memory arena in Unity using unsafe code and manual heap allocation. You’ll learn how to allocate raw memory for temporary graph-like structures—such as crafting trees or decision planners—without triggering the garbage collector. We’ll walk through the concept of stack frames, translate that to heap-based arena allocation, and implement a fast, disposable system that gives you full control over memory layout and lifetime. Perfect for performance-critical systems where GC spikes aren’t acceptable.

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▬ Contents of this video ▬▬▬▬▬▬▬▬▬▬

0:00 Memory Arena
6:00 Simulator
8:38 Using the Arena

*Source code:* gist.github.com/adammyhre/b94637dc8ee5e272b05375c61da6d161

More Useful Code:
github.com/adammyhre?tab=repositories
Unity Utility Library: github.com/adammyhre/Unity-Utils
Lock Inspector Hotkey: gist.github.com/adammyhre/4754f731a93bf1cab0d1385ccfa23642

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