Those type of interviews have been the most enjoyable. Having to code a function to do a very specific thing while also having to come up with the algorithm with strict requirements in a half hour while the interviewer watches over your shoulder are the worst. And then having to repeat that for 4+ more interviewers just isn't worth it to me anymore.
I did an interview at Fitbit where I did a phone interview with the manager who asked me algorithmic questions, then I had to write a program and make it optimized and pretty which took about a day to write, then I had to do about a 4-5 hour interview on site where I was drilled by about 8-10 different people 2 at a time to write code on a whiteboard. After all that and taking off work to do it I didn't get an offer saying my experience doesn't match up with what they are looking for. It was after that I realized I'm not going to go through all that bullshit anymore.
