Databases Reference
In-Depth Information
In the Monitor Activity section where APEX uses this technique in the reports, APEX uses a
transparent 1-pixel image, which is more performant.
If you want to verify yourself how many requests the browser is doing for your page, you can easily
do that with Firebug, which is a plug-in of Firefox.
In Figure 2-5 you find the Firebug output of the chart with the random colors for the bar. In Figure
2-6 it is the same chart but with only one color. If you compare the time it takes, the number of requests
it handles, and the amount of data it transfers to render the chart, you can see the difference.
Figure 2-5.
HTML chart with random colors
