Re: Performance - RPG vs Cobol

On 2017-05-31 8:10 AM, Rob Berendt wrote:

I would not think there would be a performance difference.

That being said however, there are some interesting defaults...
For example, an RPG Input Primary file has some interesting record
blocking which I've found to be a performance boost. Sure, you can tailor
your blocking factor in other files but I was talking about defaults here.
Just look at the compiler messages on an Input Primary file about
blocking.

RPG will automatically block some non-primary/secondary files too, and put out the braggy message about doing blocking.

There are some opcodes, such as CHAIN, that will prevent the compiler from automatically blocking, but you can code BLOCK(*YES) on the file to get it to do blocking even if you use CHAIN and SETLL. There are a few opcodes that prevent blocking, like READE; if you code BLOCK(*YES) on a file that uses one of those opcodes, you'll get a compile-time error.