diff --git a/check_container_upgrade b/check_container_upgrade
index c65af2f..b300f68 100755
--- a/check_container_upgrade
+++ b/check_container_upgrade
@@ -40,6 +40,13 @@ function in_array() {
 	return 1
 }
 
+function implode() {
+	local d=${1-} f=${2-}
+	if shift 2; then
+		printf %s "$f" "${@/#/$d}"
+	fi
+}
+
 function usage() {
 	error="$1"
 	[ -n "$error" ] && echo "$error"
@@ -252,20 +259,38 @@ fi
 
 debug "Final exit code: $EXIT_CODE"
 
+debug "Check containers (${#CHECKED_CONTAINERS[@]}): $( implode ", " "${CHECKED_CONTAINERS[@]}" )"
+debug "Containers with errors (${#ERRORS[@]}): $( implode ", " "${!ERRORS[@]}" )"
+debug "Not found containers (${#NOTFOUNDS[@]}): $( implode ", " "${NOTFOUNDS[@]}" )"
+
+# Compute performance data
+let CONTAINER_COUNTS=${#CHECKED_CONTAINERS[@]}+${#NOTFOUNDS[@]}
+PERF_DATA=(
+	"uptodate_containers=${#UPTODATE[@]};;;0;$CONTAINER_COUNTS"
+	"containers_with_errors=${#ERRORS[@]};1;;0;$CONTAINER_COUNTS"
+	"unknown_state_containers=${#UNKNOWNS[@]};;;0;$CONTAINER_COUNTS"
+)
+
+# Display check result message
 case $EXIT_CODE in
 	0)
-		echo "OK - All ${#UPTODATE[@]} container(s) are uptodate"
+		echo -n "OK - All ${#UPTODATE[@]} container(s) are uptodate"
 		;;
 	1)
-		echo "WARNING - ${#ERRORS[@]} container(s) need to be updated"
+		echo -n "WARNING - ${#ERRORS[@]} container(s) need to be updated"
 		;;
 	2)
-		echo "CRITICAL - ${#ERRORS[@]} container(s) need to be updated"
+		echo -n "CRITICAL - ${#ERRORS[@]} container(s) need to be updated"
 		;;
 	*)
-		echo "UNKNOWN - fail to retrieve status of ${#UNKNOWNS[@]} container(s)"
+		echo -n "UNKNOWN - fail to retrieve status of ${#UNKNOWNS[@]} container(s)"
 		;;
 esac
+
+# Add performance data
+echo " |$( implode " " "${PERF_DATA[@]}" )"
+
+# Display details, starting by errors
 for container in ${!ERRORS[@]}
 do
     echo ${container} - ${ERRORS[${container}]}