From: Brian Candler <B.Candler@...>
Date: 2003-04-03T21:23:41+09:00
Subject: Re: Newbie question:read file speed

On Thu, Apr 03, 2003 at 06:47:49PM +0900, Peter Hickman wrote:
>   13.47     8.46      1.41    45425     0.03     0.03  Fixnum#==
>    9.65     9.47      1.01    45425     0.02     0.02  Fixnum#%
>    9.36    10.45      0.98    45425     0.02     0.02  Fixnum#+

I wonder why Fixnum#== is slower than % or + ? I think that's just an
artefact of the profiler.

$ time ruby -e '1_000_000.times { 1 == 1 }'

real    0m2.366s
user    0m2.292s
sys     0m0.001s
$ time ruby -e '1_000_000.times { 1 + 1 }'

real    0m2.366s
user    0m2.302s
sys     0m0.000s

and repeat to be sure:

$ time ruby -e '1_000_000.times { 1 == 1 }'

real    0m2.440s
user    0m2.291s
sys     0m0.000s
$ time ruby -e '1_000_000.times { 1 + 1 }'

real    0m2.426s
user    0m2.306s
sys     0m0.000s

The source for fix_equal could hardly be simpler.

Cheers,

Brian.