From: Joel VanderWerf <vjoel@...>
Date: 2003-09-23T06:24:26+09:00
Subject: Re: Operator overloading

Joel VanderWerf wrote:
>                             user     system      total        real
> warmup                 16.980000   2.850000  19.830000 ( 22.501646)
> using *= and /=         0.400000   0.050000   0.450000 (  0.462865)
> using mul! and div!     0.160000   0.020000   0.180000 (  0.181544)
> using no ops            0.000000   0.000000   0.000000 (  0.006473)

Oops. I meant for all arrays to be 100x100, in which case the times are 
more reasonable:

                             user     system      total        real
warmup                 16.900000   2.740000  19.640000 ( 22.567519)
using *= and /=        16.650000   2.820000  19.470000 ( 22.195233)
using mul! and div!     5.360000   0.440000   5.800000 (  6.051514)
using no ops            0.010000   0.000000   0.010000 (  0.006231)

But there is still a factor of 3 improvement in mul! and div! over *= 
and /=.