Can you please provide the working sample project along with source files so that we may add issue for investigation on our end. I am also assuming that you have tried using the latest version Aspose.Imaging for .NET 21.6 on your end.
This is your test tif from github. I cannot share the original test file because it contains sensitive information. I can PM it if you like.
The output is the same:
windows 10:
page 0 of 5
Save tiff: 113ms
Save thumbnail: 528ms
page 1 of 5
Save tiff: 38ms
Save thumbnail: 232ms
page 2 of 5
Save tiff: 56ms
Save thumbnail: 225ms
page 3 of 5
Save tiff: 36ms
Save thumbnail: 233ms
page 4 of 5
Save tiff: 35ms
Save thumbnail: 223ms
windows server 2019:
page 0 of 5
Save tiff: 314ms
Save thumbnail: 2300ms
page 1 of 5
Save tiff: 129ms
Save thumbnail: 1867ms
page 2 of 5
Save tiff: 172ms
Save thumbnail: 1806ms
page 3 of 5
Save tiff: 113ms
Save thumbnail: 1824ms
page 4 of 5
Save tiff: 98ms
Save thumbnail: 1843ms
I have created a ticket in our issue tracking system with ID IMAGINGNET-4606 to further evaluate the performance in Windows Server 2019. This thread has been linked with the issue so that you may be notified once the issue will be addressed.
page 0 of 5
Save tiff: 108ms
Save thumbnail: 354ms
page 1 of 5
Save tiff: 40ms
Save thumbnail: 313ms
page 2 of 5
Save tiff: 52ms
Save thumbnail: 234ms
page 3 of 5
Save tiff: 39ms
Save thumbnail: 233ms
page 4 of 5
Save tiff: 41ms
Save thumbnail: 230ms
windows server 2019:
page 0 of 5
Save tiff: 334ms
Save thumbnail: 2108ms
page 1 of 5
Save tiff: 149ms
Save thumbnail: 1783ms
page 2 of 5
Save tiff: 124ms
Save thumbnail: 1707ms
page 3 of 5
Save tiff: 103ms
Save thumbnail: 1721ms
page 4 of 5
Save tiff: 121ms
Save thumbnail: 1759ms