freecache

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I already know the free cache is fast than map.

but freecache store []byte in memory, and always our's data isn't []byte, so we should marshal or convert data to []byte..

so, my question is marshal time worth using freecache?

Most of the time, marshal/unmarshal would be much more expensive than lookup. But if you have many CPU cores and access your cache concurrently, freecache may worth using.

@coocood How about use interface{}, and use type assertion instead of marshal/unmarsh?