The issue is regarding to an application which has been developed 10 years ago.
When you open the application using Notes 8 Classic, all behavior inside the application goes fine, very fast.
However, when you open the same application with the Java version, when you do anything we got a lot of the following messages at status area, depending on customer it takes a relevant time:
Analyzing Image Colors…
Optimizing 4 Image Colors…
Reassigning Image Colors…
and so on