ppx_jane is a ppx_driver including all standard ppx rewriters.
The default way is to do #require "ppx_jane" in the OCaml
toplevel. However this has been reported to be very slow. If this is
the case, try this instead:
#ppx "ppx-jane -as-ppx"The main difference is that the first method will fire many different executables per command, each one doing their own pass, while the second will fire only one which efficiently combine all the rewritings.