dev-haskell/ghc-trace-events
Faster traceEvent and traceMarker, and binary object logging for eventlog
USE Flags
doc
Global: Adds extra documentation (API, Javadoc, etc)
hscolour
* This flag is undocumented *
hoogle
* This flag is undocumented *
profile
Global: Adds support for software performance analysis (will likely vary from ebuild to ebuild)