Nico Weber 61060c0da8 LibVT: Let Terminal keep history in a circular buffer ...

This makes Terminal::scroll_up() O(1) instead of O(n) in the
size of the history. (It's still O(n) in the size of visible
lines.)

Reduces time to run `disasm /bin/id` with the default terminal
window size from 530ms to 409ms (min-of-5) on my system.

2020-09-10 12:01:26 +02:00

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