Vigil : vdump usage

i downloaded the novel-vigil-devel.rpm to my Novell-OES 2018 SP1 , and saw an example of a client usage of vigil called vdump. i ran the vdump exe and noticed that when i make lot's of events -  it was taking vdump a long time to print them out (in  XML format). does anybody know why is it so slow???