From: Aurélien Aptel <aurelien.aptel@gmail.com>
Date: Sat, 21 Jan 2012 22:14:41 +0000 (+0100)
Subject: copy dirty lines to screen, add select() timeout & min time between draw() calls.
X-Git-Url: https://jasonwoof.com/gitweb/?a=commitdiff_plain;h=896310e5928b6daab5f594acd9648ffe8233022e;hp=896310e5928b6daab5f594acd9648ffe8233022e;p=st.git

copy dirty lines to screen, add select() timeout & min time between draw() calls.


* add a timeout value (SELECT_TIMEOUT) of 20ms in the select() call
* wait at least 20ms (DRAW_TIMEOUT) between draw() calls
* only copy dirty lines from the buffer to the screen

what draw() does:
* clears dirty lines in the buffer
* draws the longest same-attributes string of each
  dirty line to the buffer with multiple xdraws() call
* copies the current dirty line from buffer to the screen with a single
  xcopy() call

this changeset makes st run ~10x faster.
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