[daniel_rh]

Blog co-author here: With the settings in the blog post, the DivANS algorithm skews towards saving space over speed. Brotli skews heavily towards decompression speed without sacrificing much ratio. The reason we focus a lot on comparing to Brotli, is that Brotli does extremely well on data stored at Dropbox.

However, I don't think the performance is a fundamental law, and there are clearly some clever optimizations yet-to-be done.

I was very surprised that the lzma-brotli mashup outperformed either. This leads me to think that with enough community involvement we could discover some really clever heuristics and algorithms for compression all together.