--- a/mercurial/archival.py	Sun Feb 04 00:33:28 2018 -0500
+++ b/mercurial/archival.py	Sun Feb 04 14:31:32 2018 -0500
@@ -18,6 +18,7 @@
 from .i18n import _
 
 from . import (
+    cmdutil,
     error,
     formatter,
     match as matchmod,
@@ -337,6 +338,7 @@
     total = len(files)
     if total:
         files.sort()
+        cmdutil._prefetchfiles(repo, ctx, files)
         repo.ui.progress(_('archiving'), 0, unit=_('files'), total=total)
         for i, f in enumerate(files):
             ff = ctx.flags(f)