Hi Fox,
We are glad to announce that our Essential Studio Volume 3, 2015 is rolled out which includes the fix for the reported performance issue and is available for download under the following link.
https://www.syncfusion.com/forums/120659/essential-studio-2015-volume-3-final-release-v13-3-0-7-is-available-for-download
We thank you for your support and appreciate your patience in waiting for this release. Please get in touch with us if you would require any further assistance.
Regards,
Harikrishnan