Microsoft today sold out its Build developers conference in about a minute, the company said.

“Last year we sold out in 20 minutes and in 1 minute this year. Sorry for everyone can’t attend in person,” tweeted Steven Guggenheimer, the executive who leads Microsoft’s developer evangelism group.

Ticket sales opened today at 9 a.m. PT (noon ET), with prices $100 higher, a 5% increase, than in recent years.

The almost-instant sell-out was the fastest in Build’s history. Microsoft exhausted its ticket supply in about 24 hours and 31 hours in 2013 and 2014, respectively, and as Guggenheimer noted, in under an hour last year.

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