long delta = System.currentTimeMillis() - start;
res.addTiming("inject", "0", delta);
int i;
for (i = 0; i < depth; i++) { // generate new segment
start = System.currentTimeMillis();
Path[] segs = generator.generate(crawlDb, segments, -1, topN, System
.currentTimeMillis());
delta = System.currentTimeMillis() - start;
res.addTiming("generate", i + "", delta);
if (segs == null) {
LOG.info("Stopping at depth=" + i + " - no more URLs to fetch.");