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Re: Making 'eq' == 'eql' in bignum branch


From: Eli Zaretskii
Subject: Re: Making 'eq' == 'eql' in bignum branch
Date: Tue, 31 Jul 2018 19:12:14 +0300

> Cc: address@hidden, address@hidden
> From: Paul Eggert <address@hidden>
> Date: Tue, 31 Jul 2018 00:10:35 -0700
> 
> Eli Zaretskii wrote:
> > Emacs compiling itself is not a typical use of floats in Emacs, IMO.
> 
> What would be a typical use, then? It'd be hard to evaluate alternatives 
> without 
> any benchmarks at all

I take it we agree that if someone writes a Lisp program which does FP
calculations, their chance of having a lot of such values would be
quite low, yes?  So we should put such use cases aside.

One way of estimating what happens in the majority of uses is to find
Emacs APIs other than numerical calculations that can return floats,
and try to analyze what kind of floats will be the result.  Like
file-system-info and file-attributes, for example.

> and in the meantime 'make compile-always', despite its flaws, seems
> to be the best one we have. (It's certainly something I'd like to go
> faster....)

How faster, in absolute numbers and in percents, will your build
finish with the proposed changes?



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