The Cavs thrashed Toronto 116-78 in game five of the eastern conference finals to take a 3-2 lead in the best of seven game series.

Dellavedova was scoreless in nine minutes, but his five assists and defence on Kyle Lowry helped set up the win.

Game six is on Saturday (AEST) in Toronto.

"It will be extremely difficult playing in that beast of an arena we are going to, but we have to be composed, tough and sharp," Cavs leader LeBron James said.

The lopsided win continued a theme of the series, with both teams dominant on their home court and feeble when they travel.

James had 23 points, eight assists and six rebounds and Kyrie Irving had 23 points.

But it was the Cavs' other All-Star, Kevin Love, who fuelled the strong start.

Love, who lost his shooting touch in Cleveland's back-to-back losses on the road, hit his first six shots on his way to 25 points.

"Our aggression picked up from the start and it began with Kevin," James said.

"He was a huge reason of why we were able to play as well as we did today."

The Cavaliers were so far ahead James, Irving and Love sat out the fourth quarter.