2020.40290 Windows 10, Nvidia 970M
When Text TOP is set to Scalable (Slug method), changing fonts often causes (short) TD freezes. Depending on the size of the fontfile this can be much longer - I have some larger ones which take over 17 seconds until the TD freeze is over. The fonts are read from a M.2 NVME SSD drive.
Attached some example fonts in zipfiles