Compression support

[buinauskas]

Hello, before I begin, thank you for an excellent library!

Recently, in one of our services, we started caching more and have reached maximum available memory, meaning that Redis will evict old keys and our cache-hit ratio suffers.

The async Redis cache stores data using JSON format. It's not the most compact format, and there's little to do with our underlying data structures.

Could compression be supported before caching the underlying data as an opt-in? I am willing to implement it instead of hacking something in our project.

I was planning on using https://crates.io/crates/async-compression and its available encoders.

Thanks!

[jqnatividad]

Hi @buinauskas , if you're still planning on implementing this? If so, what compression algorithm are you thinking of using?

[buinauskas]

I would consider adding this if the author approves it. I would've considered using gzip or lz4, they provide excellent compression for JSON strings.

[jqnatividad]

+1 on this feature as I think it will greatly improve cache hit ratio, more than making up for the compression/decompression overhead.

Hopefully, if you do decide to go forward @buinauskas , that you do it for the other stores as well and not just the Redis store.