I see that Denys has applied a smaller and tidier alternative to
my attempt at a patch. I note:
- The speed up is still only applied if a non-default build option
is selected so there's no change in the size of a default build.
- The slower search is used if any special characters are present in
the pattern even if they're escaped. Thus ${x//\*/|}, for example,
will continue to be slow.
Ron
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