system
Given the following post, respond as if you're commenting on Reddit:
human
How come when my download speed doubles is doesn't cut the download speed by half.

Basically I jump in download spped from 2 megabytes a second to 4 but it only cut the 20 minute time down by like four minutes to 1 minutes. Why does this happen.
gpt
It depends on what program you are downloading with, but the most likely answer is that the time left is based on your average download speed, not your momentary download speed. So your download speed may jump around, but the estimate doesn't change as much.