Performance-analysis - Related information

• Why does the performance of the PHP7 function degrade instead of improving after using strong typing?

  topic description PHP version: PHP 7.2.9 successively uses the traditional PHP style and the post-PHP7.X strongly typed function style to execute a piece of test code with the same logic the code that is expected to be a strongly typed version has h...

  Performance-analysis c php7.1 php7 php

  Jul.16,2021
• SELECT table name. Field From. The name of the table in the middle. Does it matter if you don't write?

  < H3 > SELECT table name. Field From. The name of the table in the middle. Does it matter if you don t write? related codes ** SELECT TABLE.1,TABLE.2,TABLE.3 FROM `TABLE` WHERE ...; ** SELECT 1,2,3 FROM `TABLE` WHERE ...; there is no difference ...

  Performance-analysis mysql

  Mar.28,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b36a14-2c021.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b36a14-2c021.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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