Asynchronous loading
The loading of resources is one of the (if not the) slowest operations that can be done in any framework. This is because the files to be loaded are big, and they can come from different sources, such as optical units (DVD and Blu-ray), hard drives, and even the network.
It is another great topic, but the most important concept to understand is the inherent speed necessary to read the memory:
Figure 3.1 – A memory hierarchy
As shown in the preceding diagram, the fastest memory is the registers memory. After registers follows the cache, with different levels and access speeds: both registers and caches are directly in the processing unit (both the CPU and GPU have registers and caches, even with different underlying architectures).
Main memory refers to the RAM, which is the area that is normally populated with the data used by the application. It is slower than the cache, but it is the target of the loading operations...
