Amicable pairs: Difference between revisions

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 ==={{header|PL/I-80}}===
-Rather than populating an array with the sum of the proper divisors and then searching, the approach here performs an direct test, saving memory, and at a minimal penalty in execution speed, even though about 25% more calls are made to sumf() than would be required simply to initialize an array.
+Rather than populating an array with the sum of the proper divisors and then searching, the approach here calculates them on the fly as needed, saving memory, and avoiding a noticeable lag on program startup on the ancient systems that hosted PL/I-80.
 <syntaxhighlight lang="pl/i">
 amicable: procedure options (main);