If the Windchill compression filter is configured and dm_http_compression_level preference is set in the Creo Parametric config file (config.pro), this setting also applies to any interaction between the Creo Parametric embedded browser and the server. That is, a non-zero value of the preference ensures that not only the meta-data of Creo Parametric models but even the content/UI pages are sent in the compressed form reducing the overall network traffic.

Also note that the Creo Parametric configuration option dm_http_compression_level needs to be set before registering the server through Creo Parametric or before connecting to a registered server (if already registered). Any change in the value after the server is registered or connected, does not apply to the running Creo Parametric session.