Swift compile time analyse

SwiftCompilation.txt

This is a quick tutorial for analysing Swift compile time.

3 main steps:

1) Log the whole app build:
  xcodebuild -workspace ./App.xcworkspace -scheme App clean build OTHER_SWIFT_FLAGS="-Xfrontend -debug-time-function-bodies" | tee ~/Desktop/compile_log.txt

2) Get sorted data we want from build:
  grep '^\d*\.\d*ms' compile_log.txt | sort -n -k1 -r > compile_analyzed.txt

3) Make it more readable
  cat compile_analyzed.txt | cut -f1 -f2 | grep -v "<invalid loc>" | awk '{gsub("Path/To/Project/", "")}1'
  
 Note: 
 
 In my case compiler came out with a milions of <invalid loc>, I think it could be jumping around compiling closures or something like that.