[openstreetmap/openstreetmap-website] Scope wiki linkification characters using POSIX words (PR #6612)

[Pablo Brasero]

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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