Replaced super slow String.format call in benchmark with hand coded formatting
Replaced super slow String.format call in benchmark with hand coded formatting

zhengkejun/leveldb,dain/leveldb,ljyloo/leveldb,archiecobbs/leveldb,gaoch023/leveldb-1,kenwenzel/leveldb,kenwenzel/leveldb,xuzha/leveldb,rnarubin/leveldb,mashuai/leveldb,maxboehm/leveldb,cdapio/leveldb