final boolean shallDumpDiff = Boolean.TRUE.booleanValue();
final boolean thoroughCheck = Boolean.FALSE.booleanValue();
//
RevlogReader rr = new RevlogReader(indexFile);
rr.init(true);
rr.needData(true);
int startEntryIndex = 76507; // 150--87
rr.startFrom(startEntryIndex);
rr.readNext();
final long s0 = System.currentTimeMillis();
ByteBuffer baseRevision = null;