perf: only display the total time for perfrevlogwrite if quiet

This provide a simple way to get an overview of the total performance.

contrib/perf.py

@@ -1632,6 +1632,7 def perfrevlogwrite(ui, repo, file_=None
         ("99%", resultcount * 99 // 100),
         ("max", -1),
     ]
+    if not ui.quiet:
     for name, idx in relevants:
         data = results[idx]
         title = '%s of %d, rev %d' % (name, resultcount, data[0])