Re: Trivia: Processor MHz

[Chris Rehm <javadisciple@xxxxxxxxxxxxx>]

srichter wrote:

>Chris,
>
>Here is a c++ string class:
>
>Class String {
>
>// two data mbrs. lgth of the string and
>// a ptr to string data.
>  int mnLgth ;
>  char* mpData ;
>
>// an assignment member function.
>// user of the class codes as: string1 = string2
>// ( some confusing symbols left out )
>String operator=( const String string2 ) ;
>} ;
>
>// here is the assignment mbr function code.
>String String::operator=( const string2 )
>{
>if ( mpData != NULL )
>  {
>  free( mpData ) ;  // free old string
>  }
>
>// allocate string memory.
>  mnLgth = string2.GetLgth( ) ;
>  mpData = malloc( mnLgth + 1 ) ;
>
>// store the string value.
>  strcpy( mpData, string2.GetBuffer( ) ) ;
>
Isn't your contention that the method strcpy is not as efficient as the
MI call? So why doesn't that method implement the MI call?

>return *this ;
>}
>
>The string class is then used in a pgm:
>  String sEvilDoer ;
>  sEvilDoer = "Ibm leadership" ;
>
>This code takes a lot of cpu to run, is bloat free, abstracts away a bunch of 
>details the pgmr does not need to have deal with, does not give much chance to 
>optimize and would make our as400 grind to a halt if run as frequently as 
>efficient RPG pgms are run.
>
Why does this code take a lot of cpu to run?

>Steve Richter
>

--
Chris Rehm
javadisciple@earthlink.net

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