Fixed performance issue with writing msgpack files

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

00:03:05

passed buildgui #999891

00:04:45

 
  Test
passed linting #999892

00:01:52

passed tests #999893

00:09:15

77.0%
 
  Release
passed release #999894
manual

00:00:30