Every flush commits state the whole window re-renders on, and the window was a
flat 50 ms — twenty full renders a second under an RBN firehose. That is paid
everywhere else in the interface, and it is what a dropdown highlighting its
entries a beat behind the mouse actually is.
The window now follows the rate: 50 ms on a quiet cluster, where a spot should
appear the moment it arrives; 200 ms past five a second; 500 ms past twenty,
where half a second's delay on a line already scrolling past is invisible.
rouggy
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