Simple function to generate Pie Charts (demo) utilisiing d3.js. This function is part of the http://xhprof.io/ project. It is able to handle datasets of arbitrary size. It has several options that allow for customisation, such as the label margin, circle radius and visibility of the percentage data (refer to the source code).
FireFox cannot read the clientWidth of the SVG and the SVG itself does not expand to fill the container. Therefore, every Pie Chart SVG must be wrapped in a div container. The SVG element must have 100% width and height.
The BSD License - Copyright (c) 2012 Gajus Kuizinas.