Three.js Memory Leak Fix — Disposing GPU Resources
Three.js doesn't auto-dispose GPU resources — leaving geometries, materials, and textures uncollected leads to memory leaks that crash long-session apps.
Three.js memory leaks happen because geometries, materials, and textures live on the GPU and JavaScript garbage collection doesn't reach them. Symptom: the site runs fine for 5 minutes, then frame rate drops, then the tab crashes with "Out of memory". Fix: explicit disposal. When swapping scenes, walk the old scene tree, call .dispose() on every geometry, material, and texture. Don't forget render targets if you used postprocessing. The pmndrs/drei <Suspense> component handles this in R3F automatically; in vanilla Three.js you write a cleanup function. I keep a SceneManager class on most projects that handles disposal centrally.
Want a faster path
If your timeline is short and the project matters commercially, hiring an experienced developer often beats self-learning by 4-6 weeks of effort. I take on Three.js Memory Leak Fix — Disposing GPU Resources projects on a fixed-price basis — you get the working result without the learning detour. Reach out via the contact page if a structured engagement makes sense for what you're building.
Further reading
Three resources I recommend after this guide: the official Three.js fundamentals docs (excellent and underused), Bruno Simon's Three.js Journey (paid, comprehensive), and the React Three Fiber docs if you'll work in React. Beyond that, reading other developers' source on GitHub — search for 'three-js portfolio' on GitHub trending — accelerates learning faster than any tutorial.
Prerequisites
Before starting on three js memory leak fix, you need: a JavaScript baseline (familiarity with ES modules, async/await, npm), a working local dev environment (Node 18+, a code editor), and a basic mental model of what WebGL renders. You don't need 3D modeling skills — for most tutorials, the assets are provided. Time investment: 2-4 hours of focused work for the basic version.
Step-by-step outline
Step 1: scaffold the project (Vite + Three.js). Step 2: get a basic scene rendering — camera, light, geometry. Step 3: load the asset (glTF). Step 4: hook up animation timeline (GSAP or built-in). Step 5: add interactivity (click, scroll). Step 6: optimize for mobile (device-tier check, asset compression). Step 7: deploy. Each step builds on the previous; skipping leads to confusion later.
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