OptionalexternalWill be set to true, if the module was externalized. In this case totalTime and selfTime are identical.
OptionalimporterWhich module imported this module first. All subsequent imports are cached.
The time spent importing & executing the file itself, not counting all non-externalized imports that the file does.
The time spent importing & executing the file and all its imports.
The time spent importing & executing a non-externalized file.