Is it posible to tell unity not to compress assetBundles?

Is it posible to tell unity not to compress assetBundles? And is ther any other way to reduce dynamic assset loading time.

It is possible (at least now it is), if you pass a BuildOptions.UncompressedAssetBundle when you build the AssetBundle, however, keep in mind that this is only made for loading them in a standalone build.

Then to load them use AssetBundle.CreateFromFile.

[Answer applies to older version of Unity, at least pre-3.5]

Not compressing AssetBundles is not possible - Unity decompresses faster then typical internet connections can download the extra data, so not compressing the AssetBundles should actually make loading slower.