Eds-MBP-3:echo ed$ ls -artl ~/Library/Developer/Xcode/
total 0
drwxr-xr-x   2 ed  staff   64 Apr  2  2018 DocumentationCache
drwxr-xr-x   5 ed  staff  160 Feb 28 13:49 ..
drwxr-xr-x  17 ed  staff  544 Apr 19 20:39 iOS Device Logs
drwxr-xr-x   7 ed  staff  224 Apr 29 12:18 DerivedData
drwxr-xr-x   5 ed  staff  160 Apr 29 12:40 UserData
srwxr-xr-x   1 ed  staff    0 Apr 29 13:56 GPUToolsAgent.sock
drwxr-xr-x   7 ed  staff  224 Apr 29 13:56 .
Eds-MBP-3:echo ed$ rm -f ~/Library/Developer/Xcode/GPUToolsAgent.sock