Performance comparison

Opposite is some performance data derived from running 20 job streams.

Ten used a REXX routine invoking LE Pre-initialisation, and the other ten ran without pre-initialisation.

There is a difference as the without LE pre-initialisation LE Compliant program had to be invoked directly as a sub-routine rather than as a function.

REXX using pre-initialisation.

REXX without pre-initialisation.

Performance comparison for IRXEXCOM and SHVBLOCK runs

Run No.	Pre-Initialised	No Pre-initialisation
1	0.266915	3.013722
2	0.467353	3.202062
3	0.286654	3.231449
4	0.238732	3.107069
5	0.293989	3.108106
6	0.236904	3.176603
7	0.248275	3.203191
8	0.229925	3.300573
9	0.263016	3.075928
10	0.277185	2.895003
Average	0.280895	3.127771

It should be noted that the performance data above was not collected in a dedicated system so is subject to the impact of otherwork but that said it can be seen pre-initialisation has a considerable benefit in terms of performance which would be realised to greater effect with even more iterations.