Design issue Usernames with One Character Cannot Be Mentioned

[Amaury]

As title. Confirmed on our test site with no add-ons and on the default style:

 

[Bionic Rooster]

I can confirm this , Thanks @Amaury

 

[Digital Doctor]

I guess I'll throw out the obvious thing here.
Isn't 1 character member names a bit short, non ?

As always I love @Amaury bug reports

 

[Bionic Rooster]

Actually I mentioned it first and @Amaury was kind enough to start a bug report.

Isn't 1 character member names a bit short, non ?

Normally yes but we have a few members with 1 character user names.

 

[Mike]

This is essentially a design issue and isn't something we plan on changing. We need to do partial matches to try to determine what username you actually typed, so by allowing 1 character matches we are significantly increasing the search space (matching all users that start with A for example). This would be potentially bad for performance.