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Re: The speed of the compiler, was: Re: Combine four insns

From: Diego Novillo <dnovillo at google dot com>
To: "Joseph S. Myers" <joseph at codesourcery dot com>
Cc: Toon Moene <toon at moene dot org>, Steven Bosscher <stevenb dot gcc at gmail dot com>, Bernd Schmidt <bernds at codesourcery dot com>, Eric Botcazou <ebotcazou at adacore dot com>, Richard Guenther <richard dot guenther at gmail dot com>, gcc-patches at gcc dot gnu dot org
Date: Mon, 09 Aug 2010 13:35:52 -0400
Subject: Re: The speed of the compiler, was: Re: Combine four insns
References: <4C5C20D0.5020105@codesourcery.com> <4C5C8F7C.6010509@codesourcery.com> <AANLkTi=tnhXOPPaG8JM_TNFScoPPefY0aWi_Zjth5Y46@mail.gmail.com> <201008071010.53419.ebotcazou@adacore.com> <4C5FEF18.7010504@codesourcery.com> <4C6011F7.5040904@moene.org> <AANLkTikmGYsk4DbTugpiKvJM+CNr3=2nzCj7RUG7dO7y@mail.gmail.com> <4C601691.1000303@moene.org> <4C601E08.4020303@google.com> <Pine.LNX.4.64.1008091715380.17100@digraph.polyomino.org.uk>

On 10-08-09 13:19 , Joseph S. Myers wrote:

On Mon, 9 Aug 2010, Diego Novillo wrote:

Additionally, the very worst offender in terms of compile time is -g. The size
of debugging information is such, that I/O and communication times increase
significantly.


If communication between the compiler and assembler is an important part
of the cost there, it's possible that a binary interface between them as
suggested by Ian at<http://www.airs.com/blog/archives/268>  would help.

Well, builds are already done in tmpfs, and we have not found assembly times to show up on the radar. But as other pieces of the toolchain speed up, perhaps they will start being noticed.

Diego.

References:
- Combine four insns
  - From: Bernd Schmidt
- Re: Combine four insns
  - From: Bernd Schmidt
- Re: Combine four insns
  - From: Richard Guenther
- Re: Combine four insns
  - From: Eric Botcazou
- Re: Combine four insns
  - From: Bernd Schmidt
- Re: Combine four insns
  - From: Toon Moene
- Re: Combine four insns
  - From: Steven Bosscher
- The speed of the compiler, was: Re: Combine four insns
  - From: Toon Moene
- Re: The speed of the compiler, was: Re: Combine four insns
  - From: Diego Novillo
- Re: The speed of the compiler, was: Re: Combine four insns
  - From: Joseph S. Myers

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