Unity 2017.3构建AssetBundles耗时过长问题求助

Hey there, sorry to hear your AssetBundle build with just 15 Scriptable Objects is dragging on for 10 minutes—that’s way longer than it should be. Let’s walk through some practical fixes and checks to get that build time down:

This is the most common culprit. Scriptable Objects can quietly pull in way more assets than you’d expect, and each extra asset adds build time.

• Use Unity’s Dependency Viewer (Window > Analysis > Dependency Viewer) to inspect exactly what’s bundled with each of your Scriptable Objects. A single accidental reference to a high-res texture or complex prefab can bloat the bundle and slow everything to a crawl.
• Double-check your AssetBundle assignments in the Inspector. Make sure only the 15 Scriptable Objects are assigned to your target bundle—avoid marking entire folders, which can drag in hundreds of unused assets.

Small changes here can make a huge difference:

• Switch to Incremental Builds if you’re using BuildPipeline.BuildAssetBundles. Add BuildAssetBundleOptions.IncrementalBuild to your build script—this way Unity only rebuilds assets that have changed since the last build, instead of starting from scratch every time.
• Disable Debug Build if you don’t need it for testing. Debug builds include extra metadata that slows down processing. Use BuildAssetBundleOptions.None for faster test builds.
• Verify your script compilation settings: Go to Edit > Project Settings > Player > Other Settings, and set Script Compilation to "Incremental". If it’s set to "Always Rebuild", Unity will recompile all scripts every time you start a bundle build, which adds massive overhead.

• Clear the AssetBundle cache: Head to Edit > Preferences > Cache Server and click "Clear Cache". Old, corrupted cache data can cause unexpected slowdowns or build errors.
• Delete unused assets from your project. Even if they’re not in your bundle, Unity’s build pipeline scans all assets, so getting rid of unused textures, models, or scripts can cut down on processing time.

Believe it or not, code in your Scriptable Objects can slow down builds:

• Look for heavy operations in OnEnable() or OnDisable() methods. Unity runs these callbacks when loading assets during the build process. If any of your SOs are loading external data, processing large datasets, or instantiating objects here, that’s eating up minutes. Temporarily comment out these methods to test if build time improves.
• Audit serializable fields in your SOs. If you’re storing large data structures (like huge arrays or nested serializable classes) that don’t need to be in the bundle, consider moving that logic to runtime loading instead of serializing it. Serializing big data adds significant time to the build process.

If you’re not already using Unity’s Addressables system, it’s worth a look. It’s built to optimize asset bundle management, with smarter incremental builds and dependency tracking. For many projects, Addressables cuts build times drastically compared to the legacy BuildPipeline method.

Start with checking dependencies first—that’s almost always the root cause of unexpected build delays. Let me know if any of these steps help, or if you uncover something specific in your project that’s causing the slowdown!

内容的提问来源于stack exchange，提问作者Gadrian