Screen becomes slow in case of huge number of objects

HI everyone,

On a mendix form, we have a custom widget which loads about 7000 objects. The widget displays those objects.

However, after displayed those objects, sometime the screen is quite slow.

We are thinking that Mendix does some cleanup, triggered by timer. Each time it costs 2~3 secs, making screen freezed.

Here are the profile we captured:

Have you experienced the same behaviour? And do you know what's the solution?

Best regards,