# HG changeset patch
# User Jun Wu <quark@fb.com>
# Date 1490556395 25200
# Node ID f33c9a5e81cd1d130b1ce83091c877835a33b2e7
# Parent  080734cd2440645b6965ee2e3cea947d2d894645
metadataonlyctx: speed up sanity check

Previously the sanity check will construct manifestctx for both p1 and p2.
But it only needs the "manifest node" information, which could be read from
changelog directly.

diff -r 080734cd2440 -r f33c9a5e81cd mercurial/context.py
--- a/mercurial/context.py	Fri Feb 24 18:39:08 2017 +0100
+++ b/mercurial/context.py	Sun Mar 26 12:26:35 2017 -0700
@@ -2054,10 +2054,10 @@
         # sanity check to ensure that the reused manifest parents are
         # manifests of our commit parents
         mp1, mp2 = self.manifestctx().parents
-        if p1 != nullid and p1.manifestctx().node() != mp1:
+        if p1 != nullid and p1.changeset()[0] != mp1:
             raise RuntimeError('can\'t reuse the manifest: '
                                'its p1 doesn\'t match the new ctx p1')
-        if p2 != nullid and p2.manifestctx().node() != mp2:
+        if p2 != nullid and p2.changeset()[0] != mp2:
             raise RuntimeError('can\'t reuse the manifest: '
                                'its p2 doesn\'t match the new ctx p2')