[flang][runtime] Tweak GetNextNonBlank() performance #164521
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When skipping blanks during input from an ASCII file, scan the buffered characters directly when possible rather than using the more general path. This adds complexity, but shaves a few percent off the runtime of a code that reads in millions of list-directed integers (best time over multiple runs goes from 17.56 to 16.84 sec).
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When skipping blanks during input from an ASCII file, scan the buffered characters directly when possible rather than using the more general path. This adds complexity, but shaves a few percent off the runtime of a code that reads in millions of list-directed integers (best time over multiple runs goes from 17.56 to 16.84 sec).