extremely slow when use json node

[forum]

Internal ticket ID: AP-17326
Summary: JSON Path node slow/freezes
Fix version(s): 5.4.0
Other related topic(s):

JSON Path very slow

I am reading a JSON file and then using JSON path, but it takes forever to open the configuration window, I literally have to wait 10 minutes between adding each path. The file is 500mb in size, is this too big? I have also set the Java heap space to 12gb. Any other ideas for this? Thanks

Knime processing power blocking at every single step after finished flow

I had installed the 4.3 version and it was getting worse and worse in efficiency during two days. I have installed 4.5 to see if it could improve. I have a two flows in the same workflow with just about 50 nodes of grouping, combining columns, filtering, pivoting, nothing special. If I reset the nodes the whole workflow runs in about a minute, not more. Once finished if I just try to click on a node knime begins to consume 70% CPU and doesn’t open the node for configuration until 15-20 seconds…