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print $target = time + 10; print $s and sleep $s while ( $s = ($target - time )/2 ) > 0; ... 0.0155709981918335 0.00779902935028076 1203221999.59376
print $target = time + 10; print $s and sleep $s while ( $s = ($target - time )/3 ) > 0; ... 0.00391250848770142 1.59740447998047e-005 1203222257.71881