GNU bug report logs - #36649
27.0.50; pure space and pdumper

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From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: eggert <at> cs.ucla.edu, rpluim <at> gmail.com, stefan <at> marxist.se, schwab <at> linux-m68k.org, pipcet <at> gmail.com, 36649 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>, akrl <at> sdf.org
Subject: bug#36649: 27.0.50; pure space and pdumper
Date: Wed, 12 May 2021 15:12:56 -0400

Lars Ingebrigtsen [2021-05-12 19:58:46] wrote:
> Eli Zaretskii <eliz <at> gnu.org> writes:
>>> How crippled are we talking?
>> As in "less efficient".

It will be less efficient, indeed, because the GC will take longer
because it will also traverse the part of the heap that used to live in
the purespace.  This effect is more noticeable in sessions where the
heap is small (and hence what used to be purespace represents a more
significant fraction of the total) and becomes unmeasurable once the
heap becomes large enough to dwarf the purespace.

But please note that we have all been living with exactly this
inefficiency ever since we started using pdump.  So while it will be
slightly less efficient, it will still be as efficient as what we get
with pdump, which I believe we all consider as acceptable.


        Stefan

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