Dialog freezing Firefox/Chrome in Windows when it has to display lots of information

Dialog freezing Firefox/Chrome in Windows when it has to display lots of information

I need to display a JQuery UI dialog with a lot of data previously loaded within the dialog parent element. The problem is that this information will likely have lots of lines of jobs that have to be billed, grouped by worker in an accordion, to have it all tidy and without a huge scroll. See the image attached.

Everything works fine in Chrome/FF on Linux, but fails in Windows. The script freezes when the dialog has to be opened with all that info already loaded.

What could I do to fix this?