Mercurial > hg > mercurial-crew

diff mercurial/tags.py @ 24916:b061a2049662

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tags: have a different cache file per filter level Currently whichever filter level asks for tags last will write the data on disk. This create massive issues when tags are read for "visible" and "unfiltered" on large and multi headed repository (like Mozilla central). See issue4550 for details Each filter level recomputes its own cache without direct collaboration but they all share the same 'hgtagsfnodes' cache. And that is where most of the time is spent.
author Pierre-Yves David <pierre-yves.david@fb.com>
date Wed, 15 Apr 2015 18:34:34 -0400
parents 07200e3332a1
children d082c6ef9ec3
line wrap: on
line diff
--- a/mercurial/tags.py
+++ b/mercurial/tags.py
@@ -246,6 +246,13 @@
         ahist.extend([n for n in bhist if n not in ahist])
         alltags[name] = anode, ahist
 
+def _filename(repo):
+    """name of a tagcache file for a given repo or repoview"""
+    filename = 'cache/tags'
+    if repo.filtername:
+        filename = '%s-%s' % (filename, repo.filtername)
+    return filename
+
 def _readtagcache(ui, repo):
     '''Read the tag cache.
 
@@ -265,7 +272,7 @@
     '''
 
     try:
-        cachefile = repo.vfs('cache/tags', 'r')
+        cachefile = repo.vfs(_filename(repo), 'r')
         # force reading the file for static-http
         cachelines = iter(cachefile)
     except IOError:
@@ -360,7 +367,7 @@
 
 def _writetagcache(ui, repo, heads, tagfnode, cachetags):
     try:
-        cachefile = repo.vfs('cache/tags', 'w', atomictemp=True)
+        cachefile = repo.vfs(_filename(repo), 'w', atomictemp=True)
     except (OSError, IOError):
         return