On my cpu the site renders very slow with default graph activated.
Also seeing that here on a fast 8-core machine with plenty of RAM (on Linux/Chrome), I guess it's an algorithmic issue - all other tabs work properly, but the graph takes 4-7 seconds to show up, there must be some optimization potential left there...
The graphs seems to have issued loading the large amount of data in the present form.
I have moved a copy of the data to a flat file and tested if that was the delay, however it did not help.
The issue lays solely with highcharts or its config. I have not found any special config options that help with this so far.
They have an example of loading over a million data points into a chart, however if I edit that same example, and point it to our data, which is far less, and provided on an instant load basis in the same fashion, it still takes time to load.
I have a support request in with them and we are working to get this resolved soon.
Thank you for your patience and understanding!
-Ukyo