Last year I did the trail in 15 days, and finished atop Mt. Whitney on my 45th birthday. The key for my partner and me was getting up and hiking by 6 AM each day. We limited ourselves to one pass a day, and tried to get within striking distance of each pass so we weren’t climbing in the heat of the day.
I took something like 400 photos, went fly fishing most days, did the side trip to the top of Half Dome, went swimming, took naps most days at lunch, took plenty of breaks, and read two books on the trail. In other words, I smelled the flowers. And they smelled nice! 
Have a great trip!!
Jeffrey Hunter