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From: "Etienne Baudin" <pfoxNO@SPAMfree.fr>
Newsgroups: comp.lang.ada
Subject: Re: fastest data structure
Date: Wed, 11 Dec 2002 16:02:52 +0100
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Thanks for answers and the test program. I just modified My_type with a
record like that

type My_Type is record
    un : Integer;
    deux : Integer;
    trois : Integer;
    quatre : Integer;
    cinq : Integer;
    six : Integer;
 end record;

and process:

   procedure Processing (Data : My_Type ) is
      value : Integer;
      pragma Volatile( Value );
   begin
      value := data.un;
      value := data.un;
      value := data.un;
      value := data.un;
   end Processing;

and I obtained some weird results :

-- when I let the six components in My_type
Time for array based loop is   0.00151
Time for linked list based loop is   0.00175

-- with only 3 components in the record
Time for array based loop is   0.00109
Time for linked list based loop is   0.00112

--with only 1 component :
Time for array based loop is   0.00050
Time for linked list based loop is   0.00047

The process is the same with the 3 test (always reading "un") , and the
running time seems depend on the record size....??

Etienne Baudin