Not really on 'latency' per se as discussed in the articole but an interesting take on slow terminals is Casey Muratori's famous rant on the topic [0] that led him to write his own terminal [1], a reference renderer for monospace terminal displays that is several orders of magnitude faster than Windows Terminal despite being largely unoptimized.
[0] https://www.youtube.com/watch?v=hxM8QmyZXtg
[1] https://github.com/cmuratori/refterm