[jerryX]

Zstd uses this new ANS coding: https://en.wikipedia.org/wiki/Asymmetric_numeral_systems

[tester756]

Guy who stands behind this has insane CV

2015- Jagiellonian University, Institute of Computer Science, assistant professor,

2013-2014 Purdue University, NSF Center for Science of Information, Postdoctoral researcher (webpage),

2006-2012 Jagiellonian University, Cracow, PhD in Theoretical Physics (thesis)

2004-2010 Jagiellonian University, Cracow, PhD in Theoretical Computer Science (thesis)

2001-2006 Jagiellonian University, Cracow, MSc in Theoretical Physics (thesis)

2000-2005 Jagiellonian University, Cracow, MSc in Theoretical Mathematics (thesis)

1999-2004 Jagiellonian University, Cracow, MSc in Computer Science (thesis)

[shockinglytrue]

IIRC it doesn't use ANS for every compression level, can't remember much more than that, though