I encounter the problem of a lagging TWX mashup builder. The more elements(widgets) my mashup gets the slower the whole mashup builder application gets. There are no heavy loaded binded services and no big files on the mashup - just two tabs of some widgets. The problem mainly occurs in Mashup Builder, in runtime the mashup performs pretty well.
Version: 7.1.4 H2 installation on Tomcat 8.0.33
4 Core, 16GB VM (Ressource Monitor shows minimal usage of the system ressources)