diff --git a/plot-timing.sh b/plot-timing.sh
new file mode 100755
index 0000000..d275746
--- /dev/null
+++ b/plot-timing.sh
@@ -0,0 +1,45 @@
+#!/bin/bash
+
+set -ue
+
+TMPFILE="/dev/shm/plot-timing.tmp"
+IMAGE="timing.png"
+
+tail -3600 WS/timing.mp4 | awk '						\
+BEGIN	{							\
+	for (foo=0; foo<180; foo++) {				\
+		mini[foo] = 666;				\
+		maxi[foo] = -42;				\
+		}						\
+	maxidx = 0;						\
+	}							\
+	{							\
+	accu[$1] += $2;						\
+	count[$1]++;						\
+	if (mini[$1] > $2)	mini[$1] = $2;			\
+	if (maxi[$1] < $2)	maxi[$1] = $2;			\
+	last[$1] = $2;						\
+	maxidx = $1;						\
+	}							\
+END	{							\
+	for (foo=0; foo<180; foo++) {				\
+		mean = accu[foo] / count[foo];			\
+		printf "%4d %4f %4d %4d %4d\n", foo, mean, 		\
+				mini[foo], maxi[foo], last[foo];		\
+		}						\
+	}							\
+' > $TMPFILE
+
+gnuplot	<< __EOC__
+	set term png size 800,480
+	set output "timing.png"
+	set grid
+	set yrange [:200]
+	set title "HexaCone : temps de tracé vs. numéro de séquence"
+	set xlabel "numéro de la trame"
+	set ylabel "temps en secondes"
+	plot "/dev/shm/plot-timing.tmp" u 1:2 w l t "moyenne",	\
+	     "/dev/shm/plot-timing.tmp" u 1:3 w l t "minimum",	\
+	     "/dev/shm/plot-timing.tmp" u 1:4 w l t "maximum",	\
+	     "/dev/shm/plot-timing.tmp" u 1:5 w l t "dernier"
+__EOC__