how can we measure a img's load time using jiffy.

[iammutex]

As I know,Jiffy only mark the jiffy times in the HTML,so we can get
the js load time,the css load time and the execution time of the
javascript.

But we all know that the image load is carried out in parallel.so
using jiffy.mark&jiffy.measure.we can't get the load time of a
image.However, through the tag img's onload event.We can know the time
a picture is loaded.But I did not find jiffy is doing so.

So .how can we measure a img's load time using jiffy.

who know that? please tell me.

thanks very much.