Why is the execution speed of gcc on Debian faster than that of Ubuntu? the GCC, that comes with it is optimized by O3.

Why is the execution speed of gcc on Debian faster than that of Ubuntu? all built-in GCC, are optimized by O3

Gcc linux
Jun.10,2021

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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-64f5-1b372f6-2c05a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b372f6-2c05a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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