Mercurial > hgsubversion

diff hgsubversion/util.py @ 951:bd9c292665fd

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
editor: add a small changectx cache Reverts including a lot of files create many actions like: R bar (from trunk/bar:4343) For each of these files, an open_file() call is made and the parent mercurial revision is loaded to detect copies in issamefile(). This results in a big slowdown, easily reduced by caching the changectx.
author Patrick Mezard <patrick@mezard.eu>
date Sat, 06 Oct 2012 09:42:07 +0200
parents d6db289f1548
children 9c3b4f59e7e6
line wrap: on
line diff
--- a/hgsubversion/util.py
+++ b/hgsubversion/util.py
@@ -2,6 +2,7 @@ import errno
 import re
 import os
 import urllib
+from collections import deque
 
 from mercurial import cmdutil
 from mercurial import error
@@ -336,3 +337,32 @@ def getfilestoresize(ui):
     else:
         size = -1
     return size
+
+# Copy-paste from mercurial.util to avoid having to deal with backward
+# compatibility, plus the cache size is configurable.
+def lrucachefunc(func, size):
+    '''cache most recent results of function calls'''
+    cache = {}
+    order = deque()
+    if func.func_code.co_argcount == 1:
+        def f(arg):
+            if arg not in cache:
+                if len(cache) > size:
+                    del cache[order.popleft()]
+                cache[arg] = func(arg)
+            else:
+                order.remove(arg)
+            order.append(arg)
+            return cache[arg]
+    else:
+        def f(*args):
+            if args not in cache:
+                if len(cache) > size:
+                    del cache[order.popleft()]
+                cache[args] = func(*args)
+            else:
+                order.remove(args)
+            order.append(args)
+            return cache[args]
+
+    return f