[superjan]

Arithmetic coding decodes 1 bit at a time, usually in such a way that you can’t do two bits or more with SIMD instructions. So it will be slow and energy inefficient.

[astrange]

Deompression is limited by memory bandwidth IME, which means that more efficient compression is (almost) always more power-efficient too.

(I don't have numbers for this, but it was generally agreed by the x264 team at one point.)

[adgjlsfhk1]

this isn't necessarily true. zstd uses an ans which is a type of arithmetic coding which is very efficient to decode

[superjan]

Nice to learn about. It’s good to know the field has progressed, however the context focused on JPEG, where my point does apply.