# HG changeset patch
# User Matt Mackall <mpm@selenic.com>
# Date 2010-08-05 21:17:17
# Node ID 6ccd130eab0e9e425e8459754619ad75dffcdf56
# Parent  eb7b04657dae79f4b6b707022e3633faa97824da

revlog: drop cache after use to save memory footprint

If we reconstruct back to back large versions, we need to drop the cache first to avoid doubling memory usage.

diff --git a/mercurial/revlog.py b/mercurial/revlog.py
--- a/mercurial/revlog.py
+++ b/mercurial/revlog.py
@@ -1029,6 +1029,9 @@ class revlog(object):
             base = self._cache[1]
             text = self._cache[2]
 
+        # drop cache to save memory
+        self._cache = None
+
         self._loadindex(base, rev + 1)
         self._chunkraw(base, rev)
         if text is None: