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Bob Cozzi wrote: > ... > A faster way might be to create a second data structure and simply move it > into the one being cleared. If I remember right, CLEAR moves *BLANKS and > *ZEROS (metaphorically speaking) into each subfield individually. Hence the > lengthy CLEAR time. > The compiler doesn't clear the subfields individually. It creates the clear value for the whole DS at compile time and handles the whole DS (or each element of the DS array) in one instruction, not subfield by subfield. The /free version of CLEAR didn't do this until the fix for APAR SE14962. V5R2M0 : SI13771 V5R3M0 : SI15216 I don't think you could beat the compiler's CLEAR with a hand-coded version.
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