It's not querying the description field, as far as I can tell, but it is looking at the following:
The tag part of the search is a nested query which can take a while... forgive the question but do you do regular maintenance on the DB, in particular reindexing? That can have a spectacular effect on the speed of some queries.
Yeah we reindex twice per week because of some of the other performance issues we have.
Just did a test search for my machine name:
via query (using 'contains') < 2 seconds
via quick search ~ 24 seconds
You have PM