termAndPostings = new TermAndPostings[numTerms];
BytesRef lastTerm = new BytesRef();
for (int i = 0; i < numTerms; i++) {
TermAndPostings t = new TermAndPostings();
BytesRef term = new BytesRef();
term.copyBytes(lastTerm);
final int start = tvf.readVInt();
final int deltaLen = tvf.readVInt();
term.length = start + deltaLen;
term.grow(term.length);
tvf.readBytes(term.bytes, start, deltaLen);