# Unity
Big WebGL builds = slow first launch. Slow launch = fewer players. Many platforms also limit initial package size
Build size depends on:
* Unity runtime and generated code
* assets included in the build (textures, audio, shaders)
* compression (Gzip/Brotli)
* how content is delivered (e.g., Addressables)
This guide shows how to reduce the initial build without changing game logic.
Example (Fast 4G in browser DevTools)
* No optimization — full game in the initial download
* Addressables only — heavy assets loaded on demand
* Addressables + this guide — minimal initial package
Same game, different setup — much less data before the first interaction and faster startup.
