Hi Marco,
Thanks for contacting Syncfusion support.
On further analysis, the connect/disconnect method taking 40ms for each connector. Please refer to the below video for your reference.
Video:
We have checked your requirement only in our latest version of Syncfusion Diagram control and it contains only one connector established with the connection. So, could you please share us the following information,
1. Number of nodes and connectors available in the sample,
2. The version you are using in which the reported problem occurs,
3. Your sample.
Which will help us to analyze further and provide you a better solution.
Regards,
Naganathan K G