performance improvements
performance improvements

 - use QStringRef so we don't allocate
 - remove trim since RFC states that whitespaces are not allowed here
 - remove toLower since we already do that on .get

Signed-off-by: Petar Koretic <0bdc63247af490de2e3f3da15a8939ec28fc7d99@gmail.com>

qaap/recurse,xwalk/recurse