关于算法优化的例子,简单的例子:灰度变换,嵌入式处理用得到,一种优化思想,方法-Algorithm optimization on the example of a simple example: gray-scale transformation, embedded processing used to be, an optimization ideas, methods,
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001515s ]
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:0.088305s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001230s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002076s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001228s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003587s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001058s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003431s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014450s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001275s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 280672 [ RunTime:0.001369s ]