一个精确获取时间的类,利用查询CPU频率的方法.已经被包装在类中，可以方便调用.-a precise time access to the class, using the CPU frequency inquiry method. Has been packing in the category, can easily call.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002240s ]
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:0.090324s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002309s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001914s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002269s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003628s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002071s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003338s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015470s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002453s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 291612 [ RunTime:0.001136s ]
