Memory Arenas in Unity: Heap Allocation Without the GC
git-amend
Jun 8, 2025 13:01
Create an account to hide videos, mark them watched, or save them to Don't Miss.
Create an account to hide videos, mark them watched, or save them to Don't Miss.
Create an account to hide videos, mark them watched, or save them to Don't Miss.
Chapters
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.
Want to support me? 😀
Buy me a coffee! https://ko-fi.com/adammyhre
🔔 Subscribe for more Unity Tutorials https://youtube.com/@git-amend
Discord: https://discord.gg/FDRZGQBBUC
#unity3d #gamedev #indiedev
▬ Contents of this video ▬▬▬▬▬▬▬▬▬▬
*Source code:* https://gist.github.com/adammyhre/b94637dc8ee5e272b05375c61da6d161
More Useful Code:
https://github.com/adammyhre?tab=repositories
Unity Utility Library: https://github.com/adammyhre/Unity-Utils
Lock Inspector Hotkey: https://gist.github.com/adammyhre/4754f731a93bf1cab0d1385ccfa23642
*Other Recommended Tools* _(Affiliate Links)_
Tokyo Street - https://assetstore.unity.com/packages/3d/environments/urban/tokyo-street-228474?aid=1101lw3sv
DarkMode for Unity Editor - https://assetstore.unity.com/packages/tools/gui/darkmode-for-unity-editor-on-windows-281842?aid=1101lw3sv
Beautify - https://assetstore.unity.com/packages/vfx/shaders/fullscreen-camera-effects/beautify-3-advanced-post-processing-233073?aid=1101lw3sv
Umbra Soft Shadows - https://assetstore.unity.com/packages/vfx/shaders/fullscreen-camera-effects/umbra-soft-shadows-better-directional-contact-shadows-for-urp-282485?aid=1101lw3sv
Wingman - https://assetstore.unity.com/packages/tools/utilities/wingman-your-inspector-s-best-friend-303181?aid=1101lw3sv
Favorites Window - https://assetstore.unity.com/packages/tools/utilities/favorites-window-123487?aid=1101lw3sv
Logwin - https://assetstore.unity.com/packages/tools/utilities/logwin-log-debug-values-tracker-149558?aid=1101lw3sv
TimeScale Toolbar - https://assetstore.unity.com/packages/tools/utilities/timescale-toolbar-291564?aid=1101lw3sv
Odin - https://assetstore.unity.com/packages/tools/utilities/odin-inspector-and-serializer-89041?aid=1101lw3sv?aid=1101lw3sv
Odin Validator - https://assetstore.unity.com/packages/tools/utilities/odin-validator-227861?aid=1101lw3sv
Hot Reload: https://assetstore.unity.com/packages/tools/utilities/hot-reload-edit-code-without-compiling-254358?aid=1101lw3sv
Better Hierarchy: https://assetstore.unity.com/packages/tools/utilities/better-hierarchy-272963?aid=1101lw3sv
Better Transform: https://assetstore.unity.com/packages/tools/utilities/better-transform-size-notes-global-local-workspace-child-parent--276554?aid=1101lw3sv
Better Mesh Filter: https://assetstore.unity.com/packages/tools/utilities/better-mesh-filter-266489?aid=1101lw3sv
DevTasks - Offline Project Manager - https://assetstore.unity.com/packages/tools/utilities/devtasks-offline-project-manager-307257?aid=1101lw3sv
Editor Console Pro: https://assetstore.unity.com/packages/tools/utilities/editor-console-pro-11889?aid=1101lw3sv
Any Object Finder: https://assetstore.unity.com/packages/tools/utilities/any-object-finder-286455?aid=1101lw3sv
Clipper PRO: https://assetstore.unity.com/packages/tools/utilities/clipper-pro-the-ultimate-clipboard-277112?aid=1101lw3sv
Kybernetic Tools: https://assetstore.unity.com/publishers/16747?aid=1101lw3sv
Sisus Tools: https://assetstore.unity.com/publishers/41398?aid=1101lw3sv
Prime Tween - https://assetstore.unity.com/packages/tools/animation/primetween-high-performance-animations-and-sequences-2529607?aid=1101lw3s
Rabbit Logger - https://assetstore.unity.com/packages/tools/utilities/rabbit-logger-305396?aid=1101lw3s
*Follow me!*
https://linktr.ee/gitamend
Gaming
#unity tutorial
#unity arcade game
#unity game tutorial
#unity
#game development
#game dev
#game development unity
#programming
#c#
#software development
#learn to code
#learn programming
#unity tutorials
#unity devlog
#indiedev
#gamedev
#unity3d
#advanced unity
#unity memory arena
#memory arena
#unity unsafe