Re: MPS codegen

[Gerd Möllmann]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Gerd Möllmann <gerd.moellmann@gmail.com>
>> Cc: Eli Zaretskii <eliz@gnu.org>,  emacs-devel@gnu.org
>> Date: Thu, 13 Jun 2024 21:37:41 +0200
>> 
>> Maybe one could reserve + commit a suitable block upfront, maybe as one
>> big IGC_OBJ_PAD, and use read(2) or so to read the .pdmp into that
>> block.
>
> Wouldn't that slow down startup?  pdumper uses memory-mapped files to
> make that as fast as possible, and for a good reason: at the time
> pdumper was introduced people objected to have startup slow down even
> by a few hundreds of milliseconds.

I don't know. Did pdumper do many reads that were replaced with one
mmap? This one could do one large read instead of one mmap.