Re: Has eval-and-compile changed in emacs 27?

[Eli Zaretskii]

> From: Tomas Hlavaty <tom@logand.com>
> Cc: emacs-devel@gnu.org
> Date: Sat, 27 Feb 2021 01:34:11 +0100
> 
> On Fri 26 Feb 2021 at 09:54, Eli Zaretskii <eliz@gnu.org> wrote:
> > The easiest way of finding out who loads it would be to run Emacs
> > under GDB with a breakpoint on Fload.
> 
> does trace-function not work on C functions?

It's limited for tracing those; see "Restrictions" in the trace.el's
commentary.

More importantly, it is hard or even impossible to use this when
looking for loads that happen at startup time, which is what this
discussion is about.  (Also, trace.el is much heavier than a single
breakpoint.)