老外网站上一个很经典的鼠标跟随效果，改变里面的2个参数可以产生截然不同的表现效果traceline-Foreigner web site is a classic mouse to follow the effect of changing the inside of the two parameters can produce very different performance results traceline
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001017s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.084725s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001510s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001235s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000947s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003128s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000840s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003748s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015716s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001045s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 189752 [ RunTime:0.016809s ]
