I was testing https://www.anychart.com/products/anystock/gallery/Stock_Chart_Types/Multi-Series_Spline_Chart.php, and notice that when keep interacting with chart, i.e. hover over chart, tooltip is display or keep on scrolling the chart results in increase in DOM node and heap memory.
I could track the element which keeps on increasing in DOM, have attached image for it.
<text> element which child of <g> which is child of <svg> keeps on increasing.