[exim] Time / duration display

Hi all

I would like to know if its possible to display the time (Duration it take to process the mail) in the mail logs.

For example

2006-10-12 10:21:43 1GXvon-0007zr-ME Completed

would be like

2006-10-12 10:21:43 1GXvon-0007zr-ME Completed (3s)

I suppose I could write a perl script get the initial time from <= and work out the duration, but I would actually like Exim to tell me this.

Just something I was thinking.

Kind Regards
Brent Clark