diff --git a/yocto-poky/scripts/contrib/build-perf-test.sh b/yocto-poky/scripts/contrib/build-perf-test.sh
index cdd7885..7d99228 100755
--- a/yocto-poky/scripts/contrib/build-perf-test.sh
+++ b/yocto-poky/scripts/contrib/build-perf-test.sh
@@ -128,7 +128,7 @@
 OUTDIR="$clonedir/build-perf-test/results-$rev-`date "+%Y%m%d%H%M%S"`"
 BUILDDIR="$OUTDIR/build"
 resultsfile="$OUTDIR/results.log"
-bboutput="$OUTDIR/bitbake.log"
+cmdoutput="$OUTDIR/commands.log"
 myoutput="$OUTDIR/output.log"
 globalres="$clonedir/build-perf-test/globalres.log"
 
@@ -180,14 +180,13 @@
 declare -a SIZES
 size_count=0
 
-bbtime () {
-    local arg="$@"
-    log "   Timing: bitbake ${arg}"
+time_cmd () {
+    log "   Timing: $*"
 
     if [ $verbose -eq 0 ]; then 
-        /usr/bin/time -v -o $resultsfile bitbake ${arg} >> $bboutput
+        /usr/bin/time -v -o $resultsfile "$@" >> $cmdoutput
     else
-        /usr/bin/time -v -o $resultsfile bitbake ${arg}
+        /usr/bin/time -v -o $resultsfile "$@"
     fi
     ret=$?
     if [ $ret -eq 0 ]; then
@@ -206,12 +205,16 @@
     log "More stats can be found in ${resultsfile}.${i}"    
 }
 
+bbtime () {
+    time_cmd bitbake "$@"
+}
+
 #we don't time bitbake here
 bbnotime () {
     local arg="$@"
     log "   Running: bitbake ${arg}"
     if [ $verbose -eq 0 ]; then
-        bitbake ${arg} >> $bboutput
+        bitbake ${arg} >> $cmdoutput
     else
         bitbake ${arg}
     fi
@@ -350,6 +353,33 @@
     bbtime -p
 }
 
+#
+# Test 4 - eSDK
+# Measure: eSDK size and installation time
+test4 () {
+    log "Running Test 4: eSDK size and installation time"
+    bbnotime $IMAGE -c do_populate_sdk_ext
+
+    esdk_installer=(tmp/deploy/sdk/*-toolchain-ext-*.sh)
+
+    if [ ${#esdk_installer[*]} -eq 1 ]; then
+        s=$((`stat -c %s "$esdk_installer"` / 1024))
+        SIZES[(( size_count++ ))]="$s"
+        log "Download SIZE of eSDK is: $s kB"
+
+        do_sync
+        time_cmd "$esdk_installer" -y -d "tmp/esdk-deploy"
+
+        s=$((`du -sb "tmp/esdk-deploy" | cut -f1` / 1024))
+        SIZES[(( size_count++ ))]="$s"
+        log "Install SIZE of eSDK is: $s kB"
+    else
+        log "ERROR: other than one sdk found (${esdk_installer[*]}), reporting size and time as 0."
+        SIZES[(( size_count++ ))]="0"
+        TIMES[(( time_count++ ))]="0"
+    fi
+
+}
 
 
 # RUN!
@@ -359,6 +389,7 @@
 test1_p3
 test2
 test3
+test4
 
 # if we got til here write to global results
 write_results