[PATCH 02 of 10] bundlerepo: improve performance for bundle() revset expression

[Mads Kiilerich]

# HG changeset patch
# User Mads Kiilerich <madski at unity3d.com>
# Date 1358365294 -3600
# Node ID e246188705491d7faa73afb13cfcd1ac79fd9dd3
# Parent  528c8be7d397d7c2638858006bdd9d55e3e2c314
bundlerepo: improve performance for bundle() revset expression

Create the set of revision numbers directly instead of creating a list of nodes
first.

diff --git a/mercurial/bundlerepo.py b/mercurial/bundlerepo.py
--- a/mercurial/bundlerepo.py
+++ b/mercurial/bundlerepo.py
@@ -35,7 +35,7 @@
         n = len(self)
         self.disktiprev = n - 1
         chain = None
-        self.bundlenodes = []
+        self.bundlerevs = set() # used by 'bundle()' revset expression
         while True:
             chunkdata = bundle.deltachunk(chain)
             if not chunkdata:
@@ -51,10 +51,10 @@
             start = bundle.tell() - size
 
             link = linkmapper(cs)
-            self.bundlenodes.append(node)
             if node in self.nodemap:
                 # this can happen if two branches make the same change
                 chain = node
+                self.bundlerevs.add(self.nodemap[node])
                 continue
 
             for p in (p1, p2):
@@ -67,6 +67,7 @@
             self.basemap[n] = deltabase
             self.index.insert(-1, e)
             self.nodemap[node] = n
+            self.bundlerevs.add(n)
             chain = node
             n += 1
 
diff --git a/mercurial/revset.py b/mercurial/revset.py
--- a/mercurial/revset.py
+++ b/mercurial/revset.py
@@ -450,11 +450,10 @@
     Bundle must be specified by the -R option."""
 
     try:
-        bundlenodes = repo.changelog.bundlenodes
+        bundlerevs = repo.changelog.bundlerevs
     except AttributeError:
         raise util.Abort(_("no bundle provided - specify with -R"))
-    revs = set(repo[n].rev() for n in bundlenodes)
-    return [r for r in subset if r in revs]
+    return [r for r in subset if r in bundlerevs]
 
 def checkstatus(repo, subset, pat, field):
     m = None