Web interface slow - timings show 'stalling' in Chrome

I have the latest Merlin firmware on my N66U. I'm finding the web interface very slow to load, and timings on Chrome Dev tools show many of the static files to be 'stalled'. Here you can see a screenshot of the timings for loading the 'Administration -> Operation Mode' page.



There's some info on what 'stalled' means here:
http://stackoverflow.com/questions/29206067/understanding-chrome-network-log-stalled-state

Has anyone seen this...

Web interface slow - timings show 'stalling' in Chrome