测试压缩一个425K的文件需要9.4秒，压缩后的文件为177K。如果要提高压缩速度，那么算法的复杂度就得增加了。
-compression testing of a 425K file 9.4 seconds, compressed the files to 177K. If we are to raise compression speed, then the algorithm complexity must increase.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001899s ]
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:0.086175s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002309s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001987s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002071s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003720s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001925s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003348s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014721s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002341s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 322572 [ RunTime:0.001086s ]
