diff --git a/outfgen b/outfgen
new file mode 100755
index 0000000..9482083
--- /dev/null
+++ b/outfgen
@@ -0,0 +1,30 @@
+#!/bin/bash
+#
+# Generates output filename for a given commit
+#
+#  Copyright (C) 2012  Mike Gerwitz
+#
+#  This file is part of repo2html.
+#
+#  This program is free software: you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation, either version 3 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# #
+
+ts="${1?Missing timestamp}"
+id="${2?Missing commit id}"
+
+dateout="$( ./tsdate "$ts" %Y-%m-%d )"
+month="$( ./tsdate "$ts" %m )"
+year="${dateout%%-*}"
+
+echo "$year/$month/$id.html"
diff --git a/processor b/processor
index c8c7862..da94bdb 100755
--- a/processor
+++ b/processor
@@ -26,9 +26,6 @@ path_out="${2?Missing output path}"
 # provide default message formatter if necessary
 msgfmt="${msgfmt:-./msgfmt}"
 
-# clear the cachefile
-./hashcache clear
-
 
 # output XHTML5 header
 cat <<EOH
@@ -73,7 +70,7 @@ while read hash commit ts id subject; do
   lastyear="${lastyear:-$year}"
   firstyear="$year"
 
-  pagefile="$year/$month/$id.html"
+  pagefile="$( ./outfgen "$ts" "$id" )"
   fmtsubject="$( "$msgfmt" < <( echo "$subject"; echo ) )"
 
   [ "$prevdate" == "$dategroup" ] || {
diff --git a/repo2html b/repo2html
index bf247df..bfda50c 100755
--- a/repo2html
+++ b/repo2html
@@ -78,6 +78,15 @@ msgfmt="${msgfmt:-./msgfmt}"
 # make configuration available to all scripts
 export title desc copyright license msgfmt url_root
 
+# clear and prime the cachefile (TODO: we could maintain cache files from
+# previous runs if we offer a flag that opts out of reprocessing previously
+# processed commits)
+echo "Priming hashcache..." >&2
+./hashcache clear
+"$repotype"/list | while read hash _ ts id _; do
+  ./hashcache "$hash" "$( ./outfgen "$ts" "$id" )"
+done
+
 # pass commit list to the HTML and RSS processors
 "$repotype"/list | tee \
   >( ./rss "$repotype" "$url_root" "$rss_count" > "$path_out/rss.xml" ) \