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Subj:	GCC 2.0 Benchmarks (unoffical)

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To: help-gcc@prep.ai.mit.edu
Date: 25 Feb 92 17:01:39 GMT
Message-Id: <1992Feb25.170139.20263@eplrx7.es.duPont.com>
Organization: DuPont Central Research & Development
From: cristy@eplrx7.es.dupont.com (Cristy)
Sender: help-gcc-request@prep.ai.mit.edu
Subject: GCC 2.0 Benchmarks (unoffical)

Here are some benchmarks comparing vendor compilers with GCC 2.0 on a
Sparc IPX (~27 mips) and a RS/6000 model 550 (~60 mips).

Application 1:  an image processing application that applies a 5x5
convolution filter on a 768x768 red-green-blue image and then reduces
the number of colors to 256 using a tree-based color reduction
algorithm.  All calculations are integer.

    Compiler                  Processing Time
    -----------------------------------------
    SUN native cc                 87 seconds
    SUN unbundled acc 1.01        85 
    SUN gcc 2.0                   80 
    IBM native xlc                31
    IBM gcc 2.0                   30


Application 2:  a program that calculates the gravitational potential
using a tree-based method O(n) and for comparison the naive method
O(n^2).  Most of the calculations are floating point.

    Compiler                  Method    Processing Time
    ---------------------------------------------------
    SUN native cc             O(n)        62  seconds
    SUN unbundled acc 1.01    O(n)        51 
    SUN gcc 2.0               O(n)        54 
    IBM native xlc            O(n)        10
    IBM gcc 2.0               O(n)        10

    SUN native cc             O(n^2)      109 
    SUN unbundled acc 1.01    O(n^2)      90 
    SUN gcc 2.0               O(n^2)      93 
    IBM native xlc            O(n^2)      18
    IBM gcc 2.0               O(n^2)      17
-- 
cristy@dupont.com