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From: | Phil Sainty |
Subject: | bug#23801: 25.0.95; term.el redraws extremely slow with bidi support enabled, and large buffers |
Date: | Tue, 21 Jun 2016 03:07:58 +1200 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.1 |
On 21/06/16 02:28, Eli Zaretskii wrote:
I suspect you'll need to do something which repaints the entire terminal.I don't understand what that means. The output from "ls" repaints the entire terminal as well, as it produces 1500 lines, much more than is shown in the window.
Yes, in hindsight the slow redraws with a background colour were so blatantly drawing every single character in the terminal that I was imagining that other kinds of command output (with less colourful results) did not need to do that; and that the problem was therefore connected to the slow redraws processing many more characters than was necessary for other kinds of screen update. Now that I've (AFAICS) isolated the issue to whitespace, I can see that my earlier presumption doesn't actually make much sense. Apologies for the confusion. Let me know if you'd still like me to provide profiler or elp results? I'm well and truly done for the night, but I can follow up tomorrow. (I'm hoping that with the prior email you're now able to replicate the issue, though?)
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