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* etc/TODO: Entry about markers being non-scalable. (Bug#49127)

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Eli Zaretskii 2021-08-21 09:33:34 +03:00
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@ -1538,6 +1538,14 @@ cannot represent in Unicode.
*** Performance
**** Make the implementation of markers more eifficient
Markers are implemented as a non-sorted singly linked list of markers.
This makes them scale badly when thousands of markers are created in a
buffer for some purpose, because some low-level primitives in Emacs
traverse the markers' list (e.g., when converting between character
and byte positions), and also because searching for a marker (e.g.,
with 'buffer-has-markers-at') becomes very slow.
**** Explore whether overlay-recenter can cure overlays performance problems
**** Cache schemas. Need to have list of files and mtimes