We found a nasty issue in Toolkit/CGate last week.. if you edit a Network (for example to change the IP address of a CNI device) Toolkit/CGate will get progressively slower, in a very large project you might only have to edit a network 2-3 times before Toolkit/CGate is brought to its knees. If you're changing a whole heap of Networks, you'd be well advised to restart Toolkit/CGate after every 2-3 Networks. This will be fixed soon. (With thanks to Elecraft in Melbourne for identifying this)