Re: Performance techniques

On 09 Sep 2013 06:09, John Mathew wrote:

Can some please explain what performance steps generally follow while
coding in RPG400 and RPG IV. I had to do some performance tuning on
the existing programs. <<SNIP>>

Aside from language [thus making the discussion on-topic], and probably of more general importance, is to code in a manner such that the work is performed _efficiently_ on the OS where the code runs. In the case of the object-based IBM i OS, minimize object create\delete. In the case of the single-level-storage of the IBM i OS, tend toward one copy of anything; i.e. the original. And for any OS, minimize data-movement and copy. Of course some attempts to be efficient for the sake of performance are incompatible with good coding practices; e.g. often it is better to use a copy of data vs the original data in parameters, in order to avoid the called program having addressability to the original data, so as to prevent the called program from corrupting storage in the calling program.