Re: Fwd: emacs empty startup time increased from v 27.1 to 29.0 by factor 3?

[Eli Zaretskii <eliz@gnu.org>]

> From: John Yates <john@yates-sheets.org>
> Date: Fri, 27 Jan 2023 12:20:57 -0500
> Cc: Andrea Corallo <akrl@sdf.org>
> 
> Re my suggested parallel, Eli asked:
> 
> > How many hundreds?  Emacs 29 loads almost 300 *.eln files at startup.
> 
> I have never needed to answer that question.
> 
> I work on the code generation middle-end.  When I modify one of its
> fundamental headers over 350 modules get rebuilt.  (That number
> reflects poor dependency management, which is being addressed.)
> There are probably just as many modules unrelated to code generation
> (e.g. UI, graphics, etc).
> 
> /john
> ---------- Forwarded message ---------
> From: John Yates <john@yates-sheets.org>
> Date: Thu, Jan 26, 2023 at 8:16 PM
> Subject: Re: emacs empty startup time increased from v 27.1 to 29.0 by factor 3?
> To: <help-gnu-emacs@gnu.org>
> 
> I work on a product whose structure involves literally hundreds of
> DLLs / SOs.  We tolerate slow start-up in-house because it optimizes
> the compile / edit / debug cycle.
> 
> Packaging the final product involves an extra step to collapse our
> hundreds of images into just a handful via a secondary link step.
> I wonder if there is anything analogous that Emacs could do.

How exactly do you "collapse the hundreds of shared libraries into
just a handful by a secondary link step"?