He was voted man-of-the-match after he produced "a disciplined defensive display beyond his tender years".
Compton faced 283 balls as he ended up batting for more than six hours in a disciplined display that saw him remain undefeated at the close of play having made 149 that included 14 fours.
He enthused: 'We gave a very disciplined display and did what we set out to do, win convincingly.
Jake seemed to find the right balance in the back row and the Boks stubbornly defeated New Zealand in a disciplined and accurate display at the Royal Bafokeng Stadium.
The Boks rolled up to Ellis Park the following week to right the wrongs of their heartbreaking loss to Australia in their final away match; they provided another very strong showing with yet another disciplined and accurate display.
Glentoran had their chances - good ones - but didn't convert them and now face a battle to make the quarter finals; Portadown's disciplined display today should be enough for them.