v0.8.0

Changelog

Features

• All-new Rust backend with a remix of the folly-based implementation by @MnO2 and the "OnlineTdigest" suggestion by @kvc0 (but still using the original estimate_quantile and estimate_rank methods by @andylokandy because of their better numerical precision)
• This enables another massive speedup of ~30x for update, up to ~10x for serial merge operations, and ~1.5x for batch_update
• New sum() method

Breaking changes

• max_centroids can no longer be None
• the lowest/highest centroid are no longer automatically the min/max of the ingested values - therefore explicit "min" and "max" keys are necessary for serialization

Known issues

• max_centroids isn't completely precise anymore - digests will sometimes have 1 more centroid than "allowed"
• serialization is faulty in this version - use v0.8.1+