[PATCH 21 of 27 clfilter V2] clfilter: add a cache on repo for set of revision to filter for a given set

[Pierre-Yves David]

# HG changeset patch
# User Pierre-Yves David <pierre-yves.david at ens-lyon.org>
# Date 1349717157 -7200
# Node ID 412d0319e39b958de80d2a25b0218164ef6f8160
# Parent  d0ef65c1a9eb2569ba3333ee88edea6cb2bfafaf
clfilter: add a cache on repo for set of revision to filter for a given set.

We can't recompute it every time. This changeset contains both cache
initialization and invalidation logic.

diff --git a/mercurial/localrepo.py b/mercurial/localrepo.py
--- a/mercurial/localrepo.py
+++ b/mercurial/localrepo.py
@@ -62,7 +62,10 @@
 
 def _filteredrevs(repo, filtername):
     """returns set of filtered revision for this filter name"""
-    return computefiltered[filtername](repo.unfiltered())
+    if filtername not in repo.revsfiltercache:
+        func = computefiltered[filtername]
+        repo.revsfiltercache[filtername] = func(repo.unfiltered())
+    return repo.revsfiltercache[filtername]
 
 class repoproxier(object):
     """Changelog filterered localrepo proxy object
@@ -304,6 +307,15 @@
         # Maps a property name to its util.filecacheentry
         self._filecache = {}
 
+        # hold sets of revision t
+        # should be cleared when
+        # - new changesets,
+        # - phase change,
+        # - new obsolescence mark
+        # - working directory par
+        # - bookmark changes
+        self.revsfiltercache = {}
+
     def close(self):
         pass
 
@@ -1169,6 +1181,7 @@
         self.unfiltered()._branchcache = None # in UTF-8
         self.unfiltered()._branchcachetip = None
         obsolete.clearobscaches(self)
+        self.revsfiltercache.clear()
 
     def invalidatedirstate(self):
         '''Invalidates the dirstate, causing the next call to dirstate
@@ -1934,6 +1947,7 @@
                         if key.startswith('dump'):
                             data = base85.b85decode(remoteobs[key])
                             self.obsstore.mergemarkers(tr, data)
+                    self.revsfiltercache.clear()
             if tr is not None:
                 tr.close()
         finally:
@@ -2540,6 +2554,7 @@
                              " with %d changes to %d files%s\n")
                              % (changesets, revisions, files, htext))
             obsolete.clearobscaches(self)
+            self.revsfiltercache.clear()
 
             if changesets > 0:
                 p = lambda: cl.writepending() and self.root or ""
diff --git a/mercurial/obsolete.py b/mercurial/obsolete.py
--- a/mercurial/obsolete.py
+++ b/mercurial/obsolete.py
@@ -429,6 +429,7 @@
             if nprec in nsucs:
                 raise util.Abort("changeset %s cannot obsolete itself" % prec)
             repo.obsstore.create(tr, nprec, nsucs, flag, metadata)
+            repo.revsfiltercache.clear()
         tr.close()
     finally:
         tr.release()
diff --git a/mercurial/phases.py b/mercurial/phases.py
--- a/mercurial/phases.py
+++ b/mercurial/phases.py
@@ -249,6 +249,7 @@
             if targetphase != 0:
                 self.retractboundary(repo, targetphase, delroots)
         obsolete.clearobscaches(repo)
+        repo.revsfiltercache.clear()
 
     def retractboundary(self, repo, targetphase, nodes):
         # Be careful to preserve shallow-copied values: do not update
@@ -267,6 +268,7 @@
             currentroots.intersection_update(ctx.node() for ctx in ctxs)
             self._updateroots(targetphase, currentroots)
         obsolete.clearobscaches(repo)
+        repo.revsfiltercache.clear()
 
 def advanceboundary(repo, targetphase, nodes):
     """Add nodes to a phase changing other nodes phases if necessary.