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Re: [gfortran,patch] PR fortran/28163: Don't call library function for string copying

From: FX Coudert <fxcoudert at gmail dot com>
To: Steve Kargl <sgk at troutmask dot apl dot washington dot edu>
Cc: Bernhard Fischer <rep dot nop at aon dot at>, gfortran <fortran at gcc dot gnu dot org>, patch <gcc-patches at gcc dot gnu dot org>
Date: Sun, 25 Jun 2006 19:51:42 +0200
Subject: Re: [gfortran,patch] PR fortran/28163: Don't call library function for string copying
References: <449E8545.3090009@gmail.com> <20060625125929.GN5379@aon.at> <449EAFC3.9060606@gmail.com> <20060625154833.GA67628@troutmask.apl.washington.edu>

What are the sizes of aermod with and without your patch?
Checking Polyhedron's posted benchmark results suggest that
a 27% speed up is an important optizimation regardless of
the use of -Os.

Size (in kb) of the aermod binary, at different optimization levels, static linking or dynamic linking. Without the patch, the aermod tree dump calls _gfortran_copy_string 923 times.

* Without the patch:
	-Os	-O2
static	1618	1774
dynamic	745	897

* With the patch:
	-Os	-O2
static	1626	1775
dynamic	753	898

References:
- [gfortran,patch] PR fortran/28163: Don't call library function for string copying
  - From: FX Coudert
- Re: [gfortran,patch] PR fortran/28163: Don't call library function for string copying
  - From: Bernhard Fischer
- Re: [gfortran,patch] PR fortran/28163: Don't call library function for string copying
  - From: FX Coudert
- Re: [gfortran,patch] PR fortran/28163: Don't call library function for string copying
  - From: Steve Kargl

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