How can I write to standard output in Emacs

Question

I am trying to debug an Emacs program performance wise. In particular, I suffer an extremely long startup time (~5' compared to ~1' for a bare Emacs) on a remote connection via WLAN, cellphone etc. In this context, any message written is no help, for the display is not refreshed at all.

What I would like to do is to write onto the "standard output" of the Linux process. I am aware of the --batch mode but this is no help to me because I want to use Emacs interactively.

So how can I write messages out to the Linux-standard output (as opposed to the Emacs standard output)?

Answer 1

You can output to standard error like this:

(print "hello world" #'external-debugging-output) 

or

(princ "hello world" #'external-debugging-output) 

This can buffer, so be careful.It's not possible to output to standard out at the moment. I'm going to add that, I think!