t() in global scope causing massive slowdown

By using a small hack to find translations made after the locale module init I found something in the location_views module. On line 9 following t function is called:

define('LOCATION_VIEWS_UNKNOWN', t('unknown'));

This is not done right, and when I removed it, and replaced LOCATION_VIEWS_UNKNOWN with t('unknown') in the file, it had an enormous performace impact on my site. It actually started when I turned on devel module and found a strange cache_set call. It actually tried to cache all the translated strings in location_views module, but this call is now gone.