Unity Game Optimization - Third Edition

Being cautious of streaming

The upside of the Streaming loading type is a low runtime memory cost, since a small buffer is allocated and the file is continuously pushed through it like a data queue. This can seem quite appealing, but streaming files from the disk should be restricted to large, single-instance files only, as it requires runtime hard disk access, which is one of the slowest forms of data access available to us (second only to pulling a file through a network). Layered or transitioning music clips may run into major hiccups using the Streaming option, at which point it would be wise to consider using a different Load Type and control loading/unloading manually.

We should also avoid streaming more than one file at a time, as ...