APEX

Hi everybody!

I am playing a little bit with charts at the moment.
Therefore I created a query, which takes app. 2 seconds in the SQL Command Processor.
Then I created a region with a pie chart (SVG chart).
When I run the page, it takes several minutes until the chart appears (it is unacceptable).

1.) Does anybody have an idea, why this takes so long?
2.) Has anybody a better understanding of the SVG charts? How is the chart created, when the query was run? Is it created within the webserver and just displayed in the browser plugin? Or does the webserver just prepare some data and the chart is created within the browser plugin?
3.) How can I improve the performance of creating SVG charts?
4.) Are there other possibilities existing for creating charts?

Thank you for your help in advance and best regards,

Christian