pablobm left a comment (openstreetmap/openstreetmap-website#6612)
Not sure it's enough for a timeout, but I can confirm that in the `key=value`
patterns, the `\p{Word}` ones are running about 10x slower than similar `\w`
ones (just as a comparison, I know they are not the same). These are some
numbers, taken from running `test/models/diary_entry_test.rb` in my computer:
```
11us -
/(?<=^|[^\w!#$%&'*+,.\/:;=?@_~^\-])(?<key>[-+,.:;'%()\w]+)=(?<value>[-+,.:;'%()\/\w]+)/i
116us,
/(?<=^|[^\w!#$%&'*+,.\/:;=?@_~^\-])(?<key>[-+,.:;'%()\p{Word}]+)=(?<value>[-+,.:;'%()\/\p{Word}]+)/i
11us
/(?<=^|[^\w!#$%&'*+,.\/:;=?@_~^\-])(?<key>[-+,.:;'%()\w]+)=(?<value>[-+,.:;'%()\/\w]+)/i
116us,
/(?<=^|[^\w!#$%&'*+,.\/:;=?@_~^\-])(?<key>[-+,.:;'%()\p{Word}]+)=(?<value>[-+,.:;'%()\/\p{Word}]+)/i
24us
/(?<=^|[^\w!#$%&'*+,.\/:;=?@_~^\-])(?<key>[-+,.:;'%()\w]+)=(?<value>[-+,.:;'%()\/\w]+)/i
236us
/(?<=^|[^\w!#$%&'*+,.\/:;=?@_~^\-])(?<key>[-+,.:;'%()\p{Word}]+)=(?<value>[-+,.:;'%()\/\p{Word}]+)/i
32us
/(?<=^|[^\w!#$%&'*+,.\/:;=?@_~^\-])(?<key>[-+,.:;'%()\w]+)=(?<value>[-+,.:;'%()\/\w]+)/i
302us
/(?<=^|[^\w!#$%&'*+,.\/:;=?@_~^\-])(?<key>[-+,.:;'%()\p{Word}]+)=(?<value>[-+,.:;'%()\/\p{Word}]+)/i
```
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