Steps to Reproduce
Open the workflow editor and create a new workflow.
For more information, see the product documentation topic Workflow editor.
Add workflow activities and create about 30 activities attached via various transitions.
Check in and check out.
Note the slow load times and the slowness of drawing transition lines.
For a temporary fix, break up the workflow steps into separate subflows. Firefox and Chrome browsers perform better than IE in this situation.
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Related Problem: PRB897733