You shouldn't need a live link to investigate this problem. Using real-time charts, updating every few seconds or so and memory usage slowly increases over time. That's with 15 data points and a single chart. If you need a live link go look at the FusionWidgets example provide here: http://www.fusioncharts.com/widgets/Demos/RealTimeJS/Index.html
Open that screen in a browser and let it run for several hours; memory use slowly grows. Open multiple tabs to that example and memory use grows faster over time.