Fixed performance issue with writing msgpack files

5 jobs for archive in 14 minutes and 34 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #999890
build

00:03:05

passed #999891
buildgui

00:04:45

 
  Test
passed #999892
linting

00:01:52

passed #999893
tests

00:09:15

77.0%
 
  Release
passed #999894
manual
release

00:00:30