What's the difference between this fastcache and ybc?

[hiqsociety]

Any difference with this?
https://github.com/valyala/ybc

when should i use one or the other?

[valyala]

fastcache and ybc have the following differences:

• ybc is file-backed persistent cache, while fastcache is in-memory cache
• ybc is optimized for big values (more than 64KB) such as file contents, while fastcache is optimized for small values (up to 64KB)
• ybc stores data in mmap'ed files, which can result in program stalls - see this article for details.
• ybc requires cgo, while fastcache is written in pure Go.

[hiqsociety]

Thanks!