Rendering of chart title is slower after plot rendering

[pschoepf]

Hi, I am having a chart with some more data points (>2000). Works very well with lines only but when markers come into the game it gets slow, especially on mobile devices like iPad. Playing around a bit with the dojo src I found that the rendering of the chart title (in chart.fullRender) takes some very long time when many markers are in the chart. I moved the code block above the block that renders the plot, which reduces overall rendering time by >50%. No side effects observed, however I am not sure if this is true for all cases.

This is the code after moving the title block:

-> first render title if(this.title){

var forceHtmlLabels = (g.renderer == "canvas") && this.htmlLabels,

labelType = forceHtmlLabels

!has("ie") && !has("opera") && this.htmlLabels ? "html" : "gfx",

tsize = g.normalizedLength(g.splitFontString(this.titleFont).size);

this.chartTitle = common.createText[labelType](

this, this.surface, dim.width/2, this.titlePos=="top" ? tsize + this.margins.t : dim.height - this.margins.b, "middle", this.title, this.titleFont, this.titleFontColor

);

}

--> now render plot func.foldr(this.stack, function(z, plot){ return plot.render(dim, offsets), 0; }, 0);

[cjolif]

Would you have a simple test case handy to save me the time of creating one and see if I can reproduce? Thanks.

[trac-o-bot]

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