One big reason Metta World Peace has turned into Queensbridge’s favorite garbage-time performer is young 6-foot-10 big man Jeremy Tyler, who posted the first double-double of his career (12-11) in Friday’s 117-90 rout of the Nuggets at the Garden.

With big men Kenyon Martin and Andrea Bargnani out indefinitely, Tyler has maintained his rotation spot and is ahead of World Peace. Coach Mike Woodson — for a change — is going with youth over experience.

Tyler, who re-signed Jan. 1 after being cut in training camp, scored in all ways Friday, including two 15-foot jumpers, a spinning fastbreak dunk off his own steal and a jam following a nifty behind-the-back pass from J.R. Smith.

“[Tyler is] playing well, been playing well,’’ Woodson said. “He’s done a wonderful job. He’s got to keep doing it. He’s growing as a young player and putting his time in practice. When you do those things, good things happen.’’

Tyler said he has worked on his mid-range game to complement Amar’e Stoudemire. The two have made a decent frontcourt tandem.

“STAT is a pop guy and likes to drive,’’ Tyler said. “I try to space the floor. Anything 15 feet in, I’m comfortable.”

If this continues, Tyler could turn out to be the Knicks’ best offseason signing. Currently, newcomers Beno Udrih and World Peace are out of the rotation and candidates to be dealt at the trade deadline.