How to ReFactor a project that is iterating rapidly?

for example, how to completely restructure a project that is being iterated for a long time?

it takes a long time to ReFactor a completed project.

Python java ReFactor Project-Management Project
Feb.28,2021
  1. Open branches
  2. ReFactor by module
  3. Test
  4. merge

repeat 2-3

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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-64f5-1bf4564-31efb.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bf4564-31efb.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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