Process large diagram issue #1028
Description
Bug report issue
Description
Uploading a large bpmn hangs and can use up a lot of memory.
Reproduction steps
Upload the following bpmn: https://www.dropbox.com/s/3pk72nvqo0izkqf/SSC%20POLAND%20IT%20and%20IS%20Resources%20Management.txt?dl=0 (rename extension to xml or bpmn)
Expected behaviour
Upload should not hang
Actual behaviour
Can crash the browser. In a good scenario it takes 7 minutes to load. After loading, alterations to the diagram can still take a long time.
