SAN FRANCISCO >> Jimmy Butler has been a member of the Golden State Warriors for nearly three weeks, but early Sunday afternoon he arrived.

Playing in front of a sold-out Chase Center crowd for the first time, not long after coach Steve Kerr commended the way his calm can cut through their chaos, Butler showed just what his new coach was talking about. An arena full of his newest fans recognized it, too.

Toward the end of the first quarter, Butler seized control of a loose ball, established himself in the lane and coaxed his defender into contact. He drained both free throws, extending a commanding lead to 33-16, and the Warriors (30-27) never looked back on their way to a 126-102 win.

Steph Curry finished with a game-best 30 points on 12-of-20 shooting, and it was such a rout that he called “Night, Night” midway through the third quarter.

The win improved the Warriors’ record in the Butler era to 5-1 and was perhaps their most impressive effort yet, even against a Mavericks (31-27) team that dealt away Luka Doncic and was missing the primary piece it received in return, Anthony Davis. It also gave them a three-game winning streak for the first time since their 12-3 start.

Butler finished with 18 points, 5 assists and 3 rebounds in his first home game with the Warriors and has seemingly changed their fortunes overnight.

“You can tell our fans see the difference,” Kerr said afterward. “They feel the momentum just like we do.”

As Butler stood at the free-throw line with 50.2 seconds on the clock in the first quarter, a newly energized fan base erupted into a standing ovation. They chanted an elongated “Warrrrrrriors,” and Butler took a moment to compose himself before sinking the first of his eight foul shots.

“You could hear it just from pregame introductions,” said Brandin Podziemski, who collected a career-high 13 rebounds. “It definitely was a different environment, for sure. We went on a couple stretches where the crowd really got into it. It stinks we only get to do it one more time before we go back on the road.”

In six games with Golden State, Butler is averaging 20 points per game and has already racked up 49 from the stripe. Since adding Butler, the Warriors have gone from attempting the fourth-fewest free throws in the NBA to leading the league — including 20 of 23 (86.9%) against the Mavericks.

“Not only are we getting to the line more, we’re making them,” Kerr said of the Warriors, whose 72% success rate from the stripe prior to Butler’s arrival ranked dead last. “Maybe (Butler) is rubbing off on some of the other guys, too.”

Rolling with the same starting five as their past two wins, the Warriors used a 16-0 run — holding the Mavs scoreless for 5:35 of the first quarter — to claim the lead for good. Their lead peaked at 29 points after Butler found Podziemski for a corner 3 with 8:29 left.

Butler grabbed an offensive rebound early in the second quarter and found a cutting Quinten Post, who slammed the feed home to make it 41-20. Dallas called timeout and, again, the arena erupted, reaching decibel levels rarely heard in their five years in their palatial waterfront home.

Then again, rarely in that time has Curry ever had a running mate who does the things that Butler does. After draining his second 3-pointer in as many possessions to put Golden State up 93-69 with 2:48 left in the third quarter, Curry looked at P.J. Washington of the Mavericks and did his signature “Night, Night” celebration in his face. The Warriors had lost their past two meetings with Dallas, and Washington mocked the celebration after beating Golden State in December.

“Not the first time I’ve done that,” Curry said with a smile, noting the 2022 Finals. “(Today) it was just a moment that I had with somebody on the other side. Longer story.”

That said, Curry added, “what we’re doing right now, everyone playing with confidence, having fun ... The night, night stuff is never really predictable. It’s just whenever I’m feeling it.”

The Warriors hung Andre Iguodala’s No. 9 jersey in the rafters in a postgame ceremony. Before tipoff, Kerr compared the attributes that the four-time NBA champ and 2015 Finals MVP — shared with their newest acquisition.

“The fundamental base that Jimmy has reminds me so much of Andre,” Kerr said. “But when you put that fundamental base in a 6-8 athletic body, that’s a pretty powerful combination. And that’s what Jimmy has really added to our team, this sense of calm that, frankly, really complements the chaos of Steph and Dray.”