diff -r c3eacee01c7e -r 48fd02dac1d4 mercurial/sshpeer.py
--- a/mercurial/sshpeer.py	Tue Mar 01 17:44:41 2016 -0500
+++ b/mercurial/sshpeer.py	Tue Mar 01 18:41:43 2016 -0500
@@ -231,6 +231,31 @@
 
     __del__ = cleanup
 
+    def _submitbatch(self, req):
+        cmds = []
+        for op, argsdict in req:
+            args = ','.join('%s=%s' % (wireproto.escapearg(k),
+                                       wireproto.escapearg(v))
+                            for k, v in argsdict.iteritems())
+            cmds.append('%s %s' % (op, args))
+        rsp = self._callstream("batch", cmds=';'.join(cmds))
+        available = self._getamount()
+        # TODO this response parsing is probably suboptimal for large
+        # batches with large responses.
+        toread = min(available, 1024)
+        work = rsp.read(toread)
+        available -= toread
+        chunk = work
+        while chunk:
+            while ';' in work:
+                one, work = work.split(';', 1)
+                yield wireproto.unescapearg(one)
+            toread = min(available, 1024)
+            chunk = rsp.read(toread)
+            available -= toread
+            work += chunk
+        yield wireproto.unescapearg(work)
+
     def _callstream(self, cmd, **args):
         self.ui.debug("sending %s command\n" % cmd)
         self.pipeo.write("%s\n" % cmd)
@@ -291,7 +316,7 @@
         self._send("", flush=True)
         return self.pipei
 
-    def _recv(self):
+    def _getamount(self):
         l = self.pipei.readline()
         if l == '\n':
             self.readerr()
@@ -299,10 +324,12 @@
             self._abort(error.OutOfBandError(hint=msg))
         self.readerr()
         try:
-            l = int(l)
+            return int(l)
         except ValueError:
             self._abort(error.ResponseError(_("unexpected response:"), l))
-        return self.pipei.read(l)
+
+    def _recv(self):
+        return self.pipei.read(self._getamount())
 
     def _send(self, data, flush=False):
         self.pipeo.write("%d\n" % len(data))