diff --git a/build-compare.changes b/build-compare.changes
index bb045c6..a23e076 100644
--- a/build-compare.changes
+++ b/build-compare.changes
@@ -1,3 +1,16 @@
+-------------------------------------------------------------------
+Tue Apr 28 11:52:12 UTC 2015 - olaf@aepfle.de
+
+- 2015.04.28
+- Filter InitrdID in /linuxrc.config
+- Hexdump old and new file in parallel
+- Sort cpio file list with files to compare
+- Extract old and new files in parallel
+- Ignore block device nodes
+- Ignore character device nodes
+- Always clean tmpdir on exit in pkg-diff.sh
+- Handle squashfs files
+
 -------------------------------------------------------------------
 Mon Apr 13 08:55:39 UTC 2015 - olaf@aepfle.de
 
diff --git a/build-compare.spec b/build-compare.spec
index af423c2..edb8c15 100644
--- a/build-compare.spec
+++ b/build-compare.spec
@@ -21,7 +21,7 @@ Summary:        Build Result Compare Script
 License:        GPL-2.0+
 Group:          Development/Tools/Building
 Url:            https://github.com/openSUSE/build-compare
-Version:        2015.04.13
+Version:        2015.04.28
 Release:        0
 Source1:        COPYING
 Source2:        same-build-result.sh
diff --git a/pkg-diff.sh b/pkg-diff.sh
index 65157b7..261f0c8 100644
--- a/pkg-diff.sh
+++ b/pkg-diff.sh
@@ -20,6 +20,21 @@ if test "$#" != 2; then
    exit 1
 fi
 
+# Always clean up on exit
+local_tmpdir=`mktemp -d`
+if test -z "${local_tmpdir}"
+then
+  exit 1
+fi
+function _exit()
+{
+  chmod -R u+w "${local_tmpdir}"
+  rm -rf "${local_tmpdir}"
+}
+trap _exit EXIT
+# Let further mktemp refer to private tmpdir
+export TMPDIR=$local_tmpdir
+
 self_script=$(cd $(dirname $0); echo $(pwd)/$(basename $0))
 
 source $FUNCTIONS
@@ -168,8 +183,9 @@ diff_two_files()
   fi
 
   echo "$file differs ($ftype)"
-  hexdump -C old/$file > $file1
-  hexdump -C new/$file > $file2
+  hexdump -C old/$file > $file1 &
+  hexdump -C new/$file > $file2 &
+  wait
   diff -u $file1 $file2 | head -n 200
   return 1
 }
@@ -246,20 +262,23 @@ check_compressed_file()
         bz2)
           mv old/$file{,.bz2}
           mv new/$file{,.bz2}
-          bzip2 -d old/$file.bz2
-          bzip2 -d new/$file.bz2
+          bzip2 -d old/$file.bz2 &
+          bzip2 -d new/$file.bz2 &
+          wait
           ;;
         gzip)
           mv old/$file{,.gz}
           mv new/$file{,.gz}
-          gzip -d old/$file.gz
-          gzip -d new/$file.gz
+          gzip -d old/$file.gz &
+          gzip -d new/$file.gz &
+          wait
           ;;
         xz)
           mv old/$file{,.xz}
           mv new/$file{,.xz}
-          xz -d old/$file.xz
-          xz -d new/$file.xz
+          xz -d old/$file.xz &
+          xz -d new/$file.xz &
+          wait
           ;;
       esac
       ftype=`/usr/bin/file old/$file | sed 's@^[^:]\+:[[:blank:]]*@@'`
@@ -324,7 +343,7 @@ check_single_file()
        return 0
        ;;
     *.cpio)
-       flist=`cpio --quiet --list --force-local < "new/$file"`
+       flist=`cpio --quiet --list --force-local < "new/$file" | sort`
        pwd=$PWD
        fdir=$file.extract.$PPID.$$
        mkdir old/$fdir new/$fdir
@@ -345,6 +364,23 @@ check_single_file()
        rm -rf old/$fdir new/$fdir
        return $ret
        ;;
+    *.squashfs)
+       flist=`unsquashfs -no-progress -ls -dest '' "new/$file" | grep -Ev '^(Parallel unsquashfs:|[0-9]+ inodes )' | sort`
+       fdir=$file.extract.$PPID.$$
+       unsquashfs -no-progress -dest old/$fdir "old/$file"
+       unsquashfs -no-progress -dest new/$fdir "new/$file"
+       local ret=0
+       for f in $flist; do
+         if ! check_single_file $fdir/$f; then
+           ret=1
+           if test -z "$check_all"; then
+             break
+           fi
+         fi
+       done
+       rm -rf old/$fdir new/$fdir
+       return $ret
+       ;;
     *.tar|*.tar.bz2|*.tar.gz|*.tgz|*.tbz2)
        flist=`tar tf new/$file`
        pwd=$PWD
@@ -626,6 +662,11 @@ check_single_file()
             }' "$f"
       done
       ;;
+      */linuxrc.config)
+        echo "${file}"
+        sed -i '/^InitrdID:/s@^.*@InitrdID: something@' "old/$file"
+        sed -i '/^InitrdID:/s@^.*@InitrdID: something@' "new/$file"
+      ;;
   esac
 
   ftype=`/usr/bin/file old/$file | sed 's@^[^:]\+:[[:blank:]]*@@'`
@@ -722,6 +763,14 @@ check_single_file()
             return 1
           fi
      ;;
+     Squashfs\ filesystem,*)
+        echo "$file ($ftype)"
+        mv old/$file{,.squashfs}
+        mv new/$file{,.squashfs}
+        if ! check_single_file ${file}.squashfs; then
+          return 1
+        fi
+     ;;
      symbolic\ link\ to\ *)
        readlink "old/$file" > $file1
        readlink "new/$file" > $file2
@@ -730,6 +779,10 @@ check_single_file()
          return 1
        fi
        ;;
+     block\ special\ *)
+     ;;
+     character\ special\ *)
+     ;;
      *)
        if ! diff_two_files; then
            return 1