changeset 2214:14e876c5e1c3

stablerange: soon it will not provide any benefit and it gets in the way

This was a bit strange and memory consuming anyway.

--- a/hgext3rd/evolve/stablerange.py	Fri Mar 24 06:31:32 2017 +0100
+++ b/hgext3rd/evolve/stablerange.py	Thu Mar 23 14:17:15 2017 +0100
@@ -170,15 +170,6 @@
         # something useful to compute the above
         # mergerev -> stablesort, length
         self._stablesortprepared = {}
-        # if we already know all the revision that belong to a range, it is
-        # quite trivial to have the subrange "inherit" that knowledge. This
-        # cache is dedicated to hold the full list of revs inside a subrange
-        # when we happens to know it.
-        #
-        # For example. if we are slicing a range headed by a merge so will have
-        # the revision computed anyway, and passing that knowledge around might
-        # help to slice one of its subranges also containings a merge.
-        self._revsinrangecache = {}
         # caching parent call # as we do so many of them
         self._parentscache = {}
 
@@ -235,28 +226,25 @@
         return value
 
     def revsfromrange(self, repo, rangeid):
-        revs = self._revsinrangecache.get(rangeid)
         headrev, index = rangeid
         rangelength = self.rangelength(repo, rangeid)
-        if revs is None:
-            if rangelength == 1:
-                revs = [headrev]
-            else:
-                # get all revs under heads in stable order
-                #
-                # note: In the general case we can just walk down and then request
-                # data about the merge. But I'm not sure this function will be even
-                # call for the general case.
-                allrevs = self._stablesortcache.get(headrev)
+        if rangelength == 1:
+            revs = [headrev]
+        else:
+            # get all revs under heads in stable order
+            #
+            # note: In the general case we can just walk down and then request
+            # data about the merge. But I'm not sure this function will be even
+            # call for the general case.
+            allrevs = self._stablesortcache.get(headrev)
+            if allrevs is None:
+                allrevs = self._getrevsfrommerge(repo, headrev)
                 if allrevs is None:
-                    allrevs = self._getrevsfrommerge(repo, headrev)
-                    if allrevs is None:
-                        allrevs = stablesort(repo, [headrev],
-                                             mergecallback=self._filestablesortcache)
-                    self._stablesortcache[headrev] = allrevs
-                # takes from index
-                revs = allrevs[index:]
-            self._revsinrangecache[rangeid] = revs
+                    allrevs = stablesort(repo, [headrev],
+                                         mergecallback=self._filestablesortcache)
+                self._stablesortcache[headrev] = allrevs
+            # takes from index
+            revs = allrevs[index:]
         # sanity checks
         assert len(revs) == rangelength
         return revs
@@ -374,10 +362,6 @@
             return None
         parentrange = (p1, rangeid[1])
         # if we have an entry for the current range, lets update the cache
-        revscache = self._revsinrangecache
-        if rangeid in revscache and parentrange not in revscache:
-            parentrevs = self._revsinrangecache[rangeid][:-1]
-            self._revsinrangecache[parentrange] = parentrevs
         # if we already have subrange for this range, no need to prepare it.
         if self._subrangescache.get(parentrange) is not None:
             return None
@@ -412,9 +396,6 @@
         topsize = rangedepth - globalindex
 
         parentrange = (p1, rangeid[1])
-        if rangeid in self._revsinrangecache:
-            # revs cache should have been filled by _unpreparedparentrange
-            assert parentrange in self._revsinrangecache
 
         if topsize == 1:
             top = (rangeid[0], globalindex)
@@ -427,10 +408,6 @@
             parentsubranges = self.subranges(repo, parentrange)
             slices = parentsubranges[:-1] # pop the top
             top = (rangeid[0], globalindex)
-            # if we have an entry for the current range, lets update the cache
-            if rangeid in self._revsinrangecache:
-                parentrevs = self._revsinrangecache[rangeid][-topsize:]
-                self._revsinrangecache[top] = parentrevs
             slices.append(top)
             return slices
 
@@ -440,10 +417,8 @@
 
         result = []
         allrevs = self.revsfromrange(repo, rangeid)
-        toprevs = allrevs[localindex:]
         bottomrevs = allrevs[:localindex]
         top = (rangeid[0], globalindex)
-        self._revsinrangecache[top] = toprevs # update cache
         #
         rangedepth = self.depthrev(repo, rangeid[0])
         maxbottomdepth = self.depthrev(repo, bottomrevs[-1])
@@ -463,7 +438,6 @@
             bottomdepth = self.depthrev(repo, newhead)
             newstart = bottomdepth - len(bottomrevs)
             bottom = (newhead, newstart)
-            self._revsinrangecache[bottom] = bottomrevs # update cache
             result.append(bottom)
         else:
             # assert 1 < len(bheads), (toprootdepth, len(top), len(rangeid))
@@ -473,7 +447,6 @@
                 hrevs = [r for r in bottomrevs if r in subset]
                 start = self.depthrev(repo, h) - len(hrevs)
                 entry = (h, start)
-                self._revsinrangecache[entry] = hrevs # update cache
                 result.append(entry)
         result.append(top)
         return result