diff --git a/scripts/contrib/test_build_time.sh b/scripts/contrib/test_build_time.sh
new file mode 100755
index 0000000..9e5725a
--- /dev/null
+++ b/scripts/contrib/test_build_time.sh
@@ -0,0 +1,237 @@
+#!/bin/bash
+
+# Build performance regression test script
+#
+# Copyright 2011 Intel Corporation
+# All rights reserved.
+#
+# 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 2 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, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+#
+# DESCRIPTION
+# This script is intended to be used in conjunction with "git bisect run"
+# in order to find regressions in build time, however it can also be used
+# independently. It cleans out the build output directories, runs a
+# specified worker script (an example is test_build_time_worker.sh) under
+# TIME(1), logs the results to TEST_LOGDIR (default /tmp) and returns a
+# value telling "git bisect run" whether the build time is good (under
+# the specified threshold) or bad (over it). There is also a tolerance
+# option but it is not particularly useful as it only subtracts the
+# tolerance from the given threshold and uses it as the actual threshold.
+#
+# It is also capable of taking a file listing git revision hashes to be
+# test-applied to the repository in order to get past build failures that
+# would otherwise cause certain revisions to have to be skipped; if a
+# revision does not apply cleanly then the script assumes it does not
+# need to be applied and ignores it.
+#
+# Please see the help output (syntax below) for some important setup
+# instructions.
+#
+# AUTHORS
+# Paul Eggleton <paul.eggleton@linux.intel.com>
+
+
+syntax() {
+    echo "syntax: $0 <script> <time> <tolerance> [patchrevlist]"
+    echo ""
+    echo "  script       - worker script file (if in current dir, prefix with ./)"
+    echo "  time         - time threshold (in seconds, suffix m for minutes)"
+    echo "  tolerance    - tolerance (in seconds, suffix m for minutes or % for"
+    echo "                 percentage, can be 0)"
+    echo "  patchrevlist - optional file listing revisions to apply as patches on top"
+    echo ""
+    echo "You must set TEST_BUILDDIR to point to a previously created build directory,"
+    echo "however please note that this script will wipe out the TMPDIR defined in"
+    echo "TEST_BUILDDIR/conf/local.conf as part of its initial setup (as well as your"
+    echo "~/.ccache)"
+    echo ""
+    echo "To get rid of the sudo prompt, please add the following line to /etc/sudoers"
+    echo "(use 'visudo' to edit this; also it is assumed that the user you are running"
+    echo "as is a member of the 'wheel' group):"
+    echo ""
+    echo "%wheel ALL=(ALL) NOPASSWD: /sbin/sysctl -w vm.drop_caches=[1-3]"
+    echo ""
+    echo "Note: it is recommended that you disable crond and any other process that"
+    echo "may cause significant CPU or I/O usage during build performance tests."
+}
+
+# Note - we exit with 250 here because that will tell git bisect run that
+# something bad happened and stop
+if [ "$1" = "" ] ; then
+   syntax
+   exit 250
+fi
+
+if [ "$2" = "" ] ; then
+   syntax
+   exit 250
+fi
+
+if [ "$3" = "" ] ; then
+   syntax
+   exit 250
+fi
+
+if ! [[ "$2" =~ ^[0-9][0-9m.]*$ ]] ; then
+   echo "'$2' is not a valid number for threshold"
+   exit 250
+fi
+
+if ! [[ "$3" =~ ^[0-9][0-9m.%]*$ ]] ; then
+   echo "'$3' is not a valid number for tolerance"
+   exit 250
+fi
+
+if [ "$TEST_BUILDDIR" = "" ] ; then
+   echo "Please set TEST_BUILDDIR to a previously created build directory"
+   exit 250
+fi
+
+if [ ! -d "$TEST_BUILDDIR" ] ; then
+   echo "TEST_BUILDDIR $TEST_BUILDDIR not found"
+   exit 250
+fi
+
+git diff --quiet
+if [ $? != 0 ] ; then
+    echo "Working tree is dirty, cannot proceed"
+    exit 251
+fi
+
+if [ "$BB_ENV_EXTRAWHITE" != "" ] ; then
+   echo "WARNING: you are running after sourcing the build environment script, this is not recommended"
+fi
+
+runscript=$1
+timethreshold=$2
+tolerance=$3
+
+if [ "$4" != "" ] ; then
+    patchrevlist=`cat $4`
+else
+    patchrevlist=""
+fi
+
+if [[ timethreshold == *m* ]] ; then
+    timethreshold=`echo $timethreshold | sed s/m/*60/ | bc`
+fi
+
+if [[ $tolerance == *m* ]] ; then
+    tolerance=`echo $tolerance | sed s/m/*60/ | bc`
+elif [[ $tolerance == *%* ]] ; then
+    tolerance=`echo $tolerance | sed s/%//`
+    tolerance=`echo "scale = 2; (($tolerance * $timethreshold) / 100)" | bc`
+fi
+
+tmpdir=`grep "^TMPDIR" $TEST_BUILDDIR/conf/local.conf | sed -e 's/TMPDIR[ \t]*=[ \t\?]*"//' -e 's/"//'`
+if [ "x$tmpdir" = "x" ]; then
+    echo "Unable to determine TMPDIR from $TEST_BUILDDIR/conf/local.conf, bailing out"
+    exit 250
+fi
+sstatedir=`grep "^SSTATE_DIR" $TEST_BUILDDIR/conf/local.conf | sed -e 's/SSTATE_DIR[ \t\?]*=[ \t]*"//' -e 's/"//'`
+if [ "x$sstatedir" = "x" ]; then
+    echo "Unable to determine SSTATE_DIR from $TEST_BUILDDIR/conf/local.conf, bailing out"
+    exit 250
+fi
+
+if [ `expr length $tmpdir` -lt 4 ] ; then
+    echo "TMPDIR $tmpdir is less than 4 characters, bailing out"
+    exit 250
+fi
+
+if [ `expr length $sstatedir` -lt 4 ] ; then
+    echo "SSTATE_DIR $sstatedir is less than 4 characters, bailing out"
+    exit 250
+fi
+
+echo -n "About to wipe out TMPDIR $tmpdir, press Ctrl+C to break out...  "
+for i in 9 8 7 6 5 4 3 2 1
+do
+    echo -ne "\x08$i"
+    sleep 1
+done
+echo
+
+pushd . > /dev/null
+
+rm -f pseudodone
+echo "Removing TMPDIR $tmpdir..."
+rm -rf $tmpdir
+echo "Removing TMPDIR $tmpdir-*libc..."
+rm -rf $tmpdir-*libc
+echo "Removing SSTATE_DIR $sstatedir..."
+rm -rf $sstatedir
+echo "Removing ~/.ccache..."
+rm -rf ~/.ccache
+
+echo "Syncing..."
+sync
+sync
+echo "Dropping VM cache..."
+#echo 3 > /proc/sys/vm/drop_caches
+sudo /sbin/sysctl -w vm.drop_caches=3 > /dev/null
+
+if [ "$TEST_LOGDIR" = "" ] ; then
+    logdir="/tmp"
+else
+    logdir="$TEST_LOGDIR"
+fi
+rev=`git rev-parse HEAD`
+logfile="$logdir/timelog_$rev.log"
+echo -n > $logfile
+
+gitroot=`git rev-parse --show-toplevel`
+cd $gitroot
+for patchrev in $patchrevlist ; do
+    echo "Applying $patchrev"
+    patchfile=`mktemp`
+    git show $patchrev > $patchfile
+    git apply --check $patchfile &> /dev/null
+    if [ $? != 0 ] ; then
+        echo " ... patch does not apply without errors, ignoring"
+    else
+        echo "Applied $patchrev" >> $logfile
+        git apply $patchfile &> /dev/null
+    fi
+    rm $patchfile
+done
+
+sync
+echo "Quiescing for 5s..."
+sleep 5
+
+echo "Running $runscript at $rev..."
+timeoutfile=`mktemp`
+/usr/bin/time -o $timeoutfile -f "%e\nreal\t%E\nuser\t%Us\nsys\t%Ss\nmaxm\t%Mk" $runscript 2>&1 | tee -a $logfile
+exitstatus=$PIPESTATUS
+
+git reset --hard HEAD > /dev/null
+popd > /dev/null
+
+timeresult=`head -n1 $timeoutfile`
+cat $timeoutfile | tee -a $logfile
+rm $timeoutfile
+
+if [ $exitstatus != 0 ] ; then
+    # Build failed, exit with 125 to tell git bisect run to skip this rev
+    echo "*** Build failed (exit code $exitstatus), skipping..." | tee -a $logfile
+    exit 125
+fi
+
+ret=`echo "scale = 2; $timeresult > $timethreshold - $tolerance" | bc`
+echo "Returning $ret" | tee -a $logfile
+exit $ret
+