SELECT id FROM users WHERE active=1 AND about_me LIKE "%#firefox4%" ORDER BY username ASC, num_followers DESC
0.00756
SELECT id FROM users WHERE tags REGEXP "(^|\,| )#firefox4($|\,)" ORDER BY username ASC
0.01082
SELECT id FROM users WHERE active=1 AND (username LIKE "%#firefox4%" OR fullname LIKE "%#firefox4%" OR position LIKE "%#firefox4%") ORDER BY username ASC
0.01146
SELECT id FROM users WHERE active=1 AND (username="#firefox4" OR fullname="#firefox4" OR position="#firefox4") ORDER BY username ASC