# CompressionType

> Compression Method for Asset Bundles.

## Definition

* **Type:** Enum
* **Namespace:** [UnityEngine](/engine/6000.0/script-reference/unityengine.md)
* **Assembly:** UnityEngine.CoreModule

```csharp
public enum CompressionType
```

## Remarks

When building or recompressing Asset Bundles, these are the available compression methods. Some of these are only available for building and cannot be used for recompression.

Additional Resources: AssetBundles compression, [AssetBundle.RecompressAssetBundleAsync](/engine/6000.0/script-reference/unityengine/assetbundle/recompressassetbundleasync.md), [ArchiveHandle.Compression](/engine/6000.0/script-reference/unity/io/archive/archivehandle/compression.md).

## Fields

| Value                                                                         | Description                                                                                                                                                                       |
| ----------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [Lz4](/engine/6000.0/script-reference/unityengine/compressiontype/lz4.md)     | LZ4 compression results in larger compressed files than LZMA, but does not require the entire bundle to be decompressed before use.                                               |
| [Lz4HC](/engine/6000.0/script-reference/unityengine/compressiontype/lz4hc.md) | LZ4HC is a high compression variant of LZ4. LZ4HC compression results in larger compressed files than LZMA, but does not require the entire bundle to be decompressed before use. |
| [Lzma](/engine/6000.0/script-reference/unityengine/compressiontype/lzma.md)   | LZMA compression results in smaller compressed Asset Bundles but they must be entirely decompressed before use.                                                                   |
| [None](/engine/6000.0/script-reference/unityengine/compressiontype/none.md)   | Uncompressed Asset Bundles are larger than compressed Asset Bundles, but they are the fastest to access once downloaded.                                                          |