diff --git a/remotefilelog/remotefilectx.py b/remotefilelog/remotefilectx.py
--- a/remotefilelog/remotefilectx.py
+++ b/remotefilelog/remotefilectx.py
@@ -7,6 +7,7 @@
 
 import collections
 import os
+import time
 from mercurial.i18n import _
 from mercurial.node import bin, hex, nullid, nullrev
 from mercurial import context, util, error, ancestor, phases, extensions
@@ -345,6 +346,7 @@
 
     def _linknodeviafastlog(self, repo, path, srcrev, fnode, cl, mfl,
                             commonlogkwargs):
+        start = time.time()
         reponame = repo.ui.config('fbconduit', 'reponame')
         logmsg = ''
         if self._conduit is None:
@@ -375,7 +377,9 @@
             logmsg = 'fastlog failed (%s)' % e
             return None
         finally:
-            repo.ui.log('linkrevfixup', logmsg, **commonlogkwargs)
+            elapsed = time.time() - start
+            repo.ui.log('linkrevfixup', logmsg, elapsed=elapsed * 1000,
+                        **commonlogkwargs)
 
 
     def _verifylinknode(self, revs, linknode):