I started from the edge of the pavement at Camp 4.
My body was still feeling tense and heavy from guiding 3 days on Mt Shasta just two days prior to this effort, but this was my window so I had to make a go!
Took off...well, aggressively. Made decent time through the steep, techy, rocky switchbacks of the first three miles
Made the metal signs at the top of the Upper Yosemite Falls climb in 52:43
Saw two more metal signs for El Capitan the first a left turn, the second a right.
Made summit of El Capitan at 1:44:41
Took 8 minutes to poke around up top and see the views
Back down to the sign at the top of the switchbacks at 2:31:15
Back at the lot in 3:05:25
I definitely blew up on this. For myself I think I could cut 20 minutes off. A crusher out there is going to take this sub2hr for sure.