long c2sTime = 0;
for (CramRecord r : cramRecords) {
long time = System.nanoTime();
SAMRecord s = c2sFactory.create(r);
c2sTime += System.nanoTime() - time;
if (!r.segmentUnmapped)
Utils.calculateMdAndNmTags(s, refs, restoreMDTag, restoreNMTag);
s.setValidationStringency(validationStringency);