IBM 1130 User Manual page 651

GENERAL
This section covers many items of interest to all
1130 users:
• How to conserve core storage
• How to increase the running speed of a pro-
gram
• How to segment programs
• The proper (and improper) use of LOCAL
and SOCAL subroutines, etc.
The general theme of this chapter, is, however,
how to improve your system, or, how to increase
system performance.
The performance of your programs should be one
of the major considerations of your programmer.
Unfortunately, however, performance is all to often
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forgotten in the drive to produce a working program.
The programmer, usually working against a deadline,
devotes all his energy and ingenuity to the
TEST /
DEBUG/CORRECT/RETEST cycle, finally produc-
ing an error-free program with no time to spare,
and with little thought given to efficiency.
Hemember, however, that this program now
enters production status, to be run weekly, or
possibly daily, where its performance may greatly
affect the overall operation of the 1130 system.
Program performance is affected by three fac-
tors, each of which will be discussed in more de-
tail:
The Monitor, or software
The programmer
The system itself, or 1130 hardware