system
Given the following post, respond as if you're commenting on Reddit:
human
What's the latency of the Mars rover Perseverance regarding communications to earth / commands from earth?

I've read, that the 2012 rover had a latency around 20-40 minutes, depending on the position of the planets. Did the communication become faster?
gpt
The latency of interplanetary communication is limited by the speed of light. The one-way path between Earth and Mars will take anywhere between 3 and 20 minutes (approximately) depending on where the planets are in their orbit. So a the round-trip-time of a message would be between 6 and 40 minutes.

Improvements to signal processing on either side of the transmission will have negligible impact on the total latency. It's all about the distance and the speed of light, neither of which are things we can change.