We must be faster creating caches that are just simply copies of the same configuration.

Creating 500 caches of the default cache configuration takes around 4 seconds.
Creating 1000 caches takes around 10 seconds.

This is too slow. As shown in the profiler screenshot, calling componentRegistry.registerComponent(spi, AdvancedCache.class); is quite expensive.
The start procedure is also quite expensive, specially due to some reflection going on there.

IMO, we need fast way to clone caches. IOW, if you create Cache A based on config default config, creating/starting Cache B based on default config should be extremely fast. Simply duplicate objects and set them in the right state.

This is of particular importance in 2LC use cases where each entity/collection is stored in a separate cache and these are generally created on startup by the Hibernate Session Factory.

Check the linked user forum post for some feedback from a 2LC user.