Why does updating Xcode make my computer so slow? I updated Xcode. Now some things take forever to run.

$ time make -n
make: Nothing to be done for `update'.

real    0m30.069s
user    0m0.011s
sys     0m0.025s


Likewise Python:

$ time ./foo.py
Terminated: 15

real    3m0.015s
user    0m0.000s
sys     0m0.006s


foo.py looks like:

#!/usr/bin/python
print 'hello, world'


This happened the last time I updated Xcode. The problem went away by itself after a day or so, but I'd rather not be dead in the water for the next day or so.

I'm running 10.14.5 (18F203) on a 2018 Macbook Pro
Run Xcode post updating to make sure any post installation scripts get a chance to run.

After that, restart your Mac and see if the problem goes away.