Is it slow to install software center software on ubuntu 18?

it is slow to install the software

I changed the source of apt to Tsinghua, but software center is still very slow. I feel that the download is very slow. I don"t know what good way to do it.

Apr.01,2021

because the software you downloaded is not in the traditional apt source, it uses the snap package

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-64f5-1ea2cab-479e6.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1ea2cab-479e6.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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