Tuning Performance › NCL Procedure Usage

NCL Procedure Usage

With some products or user-written applications, a concern may be the rate at which NCL procedures are loaded into storage. Modular programming practices encourage breaking an application into as many separate small modules as possible. This leads to many loading requests for procedures issued as NCL executes.

If this is not addressed, the following problems can occur:

• Applications run slowly, as they are constantly waiting for procedures to load. This is particularly evident in some applications that call a procedure to edit each field on a panel.
• I/O to the NCL procedure libraries can be a bottleneck.
• CPU time is expended in loading and precompiling the NCL.
• Real storage is tied up for I/O buffers.