does greptimedb consider double-delta encoding?

[yihong0618]

info: https://www.timescale.com/blog/time-series-compression-algorithms-explained

e.g. https://www.slideshare.net/slideshow/double-delta-encoding-lightning-talk-for-infracoders-3/97677677

https://github.com/Sasasu/pgts

[killme2008]

We have a plan to improve the compression, but do not have time. Thanks for sharing!

It's related to the refactoring of data format and storage engine, which it's not an easy task.