From: ts <decoux@...>
Date: 2005-06-20T22:23:49+09:00
Subject: Re: x==1 vs 1==x

>>>>> "G" == Gavin Kistner <gavin@refinery.com> writes:

G> p x, x.class

uln% diff -u b.rb~ b.rb
--- b.rb~       2005-06-20 15:16:51.990598152 +0200
+++ b.rb        2005-06-20 15:17:40.826174016 +0200
@@ -3,8 +3,8 @@
 n = 100_000
 x = rand( 10 )
 p x, x.class
-Benchmark.bmbm(10){ |x|
-   x.report('case'){
+Benchmark.bmbm(10){ |xx|
+   xx.report('case'){
      n.times{
        case x
          when 0 : 0
@@ -20,7 +20,7 @@
        end
      }
    }
-   x.report('if x==n'){
+   xx.report('if x==n'){
      n.times{
        if x==0
          0
@@ -46,7 +46,7 @@
      }
    }
 
-   x.report('if n==x'){
+   xx.report('if n==x'){
      n.times{
        if 0==x
          0
uln% 

uln% ruby b.rb
7
Fixnum
Rehearsal ---------------------------------------------
case        0.170000   0.000000   0.170000 (  0.179179)
if x==n     0.190000   0.010000   0.200000 (  0.194086)
if n==x     0.190000   0.000000   0.190000 (  0.191561)
------------------------------------ total: 0.560000sec

                user     system      total        real
case        0.160000   0.020000   0.180000 (  0.180628)
if x==n     0.190000   0.010000   0.200000 (  0.195471)
if n==x     0.190000   0.010000   0.200000 (  0.193239)
uln% 



Guy Decoux