switching from another app to mimestream takes several seconds, on both a 2020 MBA and a 2019 MBP 16 (64Gb RAM). Loading a mail, the same. Spinning beach ball of death. Where is optimization on the road map?
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This is not expected, can you please email support@mimestream.com? Start by running this in Terminal, then reproducing the stall within 10s:
sample Mimestream -file ~/Desktop/sample.txt
And attach that output, thanks!

