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I think this is a general rendering performance in our text renderer, and has been the case since before the latest 9.0 update (quick testing confirmed that as well). See #858.
I filed a new issue (#1262) to track this but for now I'm closing this because this isn't a bug per se, but a general rendering performance issue.
One related issue here is that MacVim would only get repeated key input when it's handling the keyDown event, but it doesn't know how many keys it should get. If it's blocking on the main thread (which is the case here due to slow rendering performance), it will cause the observed number of key repeats to be fewer (hence this bug). By moving to Metal, in addition to better performance, the rendering is also going to be done asynchronously which should alleviate this issue.
Actually, looking into it, I think MacVim has special logic in dropping repeated keys when it's lagging behind, which I do agree feels wrong. Let me think about it more.
Steps to reproduce
mvim --clean
)80ii<Esc>
)0
)dd
)700ii<Esc>
)yy90p
)1G0
)l
and time how long it takes to get to column 80 (for me, about 6 seconds)(This affects insert repeat rate as well as cursor motion.)
(Also, I don't think this was a problem before the recent update to 9.0, but I could be wrong.)
Expected behaviour
The repeat rate shouldn't be affected by the data in the buffer.
Version of Vim and architecture
VIM - Vi IMproved 9.0 (2022 Jun 28, compiled Jul 25 2022 08:23:03) macOS version - x86_64 Included patches: 1-65
Environment
MacOS 11.6.4
MacVim GUI
How MacVim was installed
Internal update; originally installed from download
Logs and stack traces
No response
Vim configuration where issue is reproducable
No response
Issue has been tested with given configuration
Issue has been tested with no configuration
mvim --clean
(orgvim
, supplied by MacVim distribution)vim --clean
(in terminal, supplied by MacVim distribution)vim --clean
(in terminal, other suppliers, e.g. /usr/bin/vim)Other conditions
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