log speedup: set quiet/verbose/debugflag in the fake ui object

mercurial/commands.py

@@ -1802,6 +1802,9 b' def log(ui, repo, *pats, **opts):'
             self.ui = ui
             self.hunk = {}
             self.header = {}
+            self.quiet = ui.quiet
+            self.verbose = ui.verbose
+            self.debugflag = ui.debugflag
         def bump(self, rev):
             self.rev = rev
             self.hunk[rev] = []