It seems that in a recent update, something happened to melee attack speeds.
At full stamina, a punch takes 96-97 ticks. After hitting something once, the next swing takes ~180 ticks.
Could it be that the game is thinking that I’m always at ~1% stamina and doubling my attack cost?
Edit: adding version numbers
Version 0.C-7530-g686be7c
(0.c-3928)