JavaScript - http://opera.remcol.ath.cx/tests/performance-2-edit2.html
Timeout thread: delay 100 ms
Error:
name: TypeError
message: Statement on line 63: Cannot convert undefined or null to Object
Backtrace:
  Line 63 of linked script http://opera.remcol.ath.cx/tests/perf-graph.js
    			this.chartObject.viewBox = this.chartObject.svgChart.getElementById("viewbox") || null;
  Line 1 of unknown script 
    charter.SVGFuncs.start()
stacktrace:   ...  Line 1 of unknown script 
    charter.SVGFuncs.start()