Wow, I'm impressed.

An idealized benchmark shows only a 25% gain by memoizing, so I agree, it doesn't worth it.

            Rate  classic memoized
classic  75415/s       --     -19%
memoized 93110/s      23%       --

[download]
 
use strict;
 
my $obj={};
bless $obj,"Class";
 
sub classic {
  $obj->meth0->meth1->meth2->meth3->meth4->meth5->meth6->meth7->meth8-
+>meth9;
}
 
my $ref0=$obj->can("meth0");
my $ref1=$obj->can("meth1");
my $ref2=$obj->can("meth2");
my $ref3=$obj->can("meth3");
my $ref4=$obj->can("meth4");
my $ref5=$obj->can("meth5");
my $ref6=$obj->can("meth6");
my $ref7=$obj->can("meth7");
my $ref8=$obj->can("meth8");
my $ref9=$obj->can("meth9");
 
sub memoized {
  $obj->$ref0->$ref1->$ref2->$ref3->$ref4->$ref5->$ref6->$ref7->$ref8-
+>$ref9;
}
 
use Benchmark qw/cmpthese/;
 
cmpthese(1E6,
     {
      classic  => \&classic,
      memoized => \&memoized, 
     });
 
 
package Class;
 
sub meth0 { $_[0] }
sub meth1 { $_[0] }
sub meth2 { $_[0] }
sub meth3 { $_[0] }
sub meth4 { $_[0] }
sub meth5 { $_[0] }
sub meth6 { $_[0] }
sub meth7 { $_[0] }
sub meth8 { $_[0] }
sub meth9 { $_[0] }

[download]

Cheers Rolf

In reply to Re^6: Error handling in chained method calls by LanX
in thread Error handling in chained method calls by szabgab

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