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; * doc/lispref/searching.texi (Char Classes): Add speedup advice.

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Eli Zaretskii 2025-05-29 19:02:13 +03:00
parent 4507b6a9c7
commit 8881dca81c
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doc/lispref/searching.texi
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@ -616,7 +616,10 @@ This matches horizontal whitespace, as defined by Annex C of the
Unicode Technical Standard #18. In particular, it matches spaces,
tabs, and other characters whose Unicode @samp{general-category}
property (@pxref{Character Properties}) indicates they are spacing
separators.
separators. (If you only need to look for ASCII whitespace characters,
we suggest using an explicit set of character alternatives, such as
@w{@samp{[ \t]}}, instead, as it will be faster than
@code{[[:blank:]]}.)
@item [:cntrl:]
This matches any character whose code is in the range 0--31.
@item [:digit:]