[外链图片转存失败(img-YGN3FGzp-1563546605983)(https://user-images.githubusercontent.com/5669954/34096907-093e8b48-e412-11e7-821d-922ef955f4b7.png)]

Gross Runtime

the elapsed time between the start and end of a processing block.

Net Runtime

does not count runtime spent in other processing block but only the time spent processing code directly in the current being executed processing block.

Suppose in our processing block to be tested we call another FM A and B, so the duration time of A and B execution is not included in the net time.