diff --git a/DiSLProject2022/run-instr.sh b/DiSLProject2022/run-instr.sh
new file mode 100755
index 0000000..0dd6f4a
--- /dev/null
+++ b/DiSLProject2022/run-instr.sh
@@ -0,0 +1,25 @@
+#!/bin/bash
+
+set -e
+
+if [ "$#" -ne 1 ]; then
+	echo "Usage: $0 <Number of exercise>"
+	exit;
+fi
+
+exnum="$1"
+
+dir="$(dirname -- "${BASH_SOURCE[0]}")"
+cd "$dir"
+
+ant clean
+ant "-Ddislclass=ex$exnum.Instrumentation"
+
+printf "\e[32mRunning without instrumentation...\e[0m\n"
+time ./run.sh "ex$exnum.Main"
+./startDiSLServer.sh
+sleep 1
+printf "\e[32mRunning WITH instrumentation...\e[0m\n"
+time ./runInstrumented.sh "ex$exnum.Main"
+
+
diff --git a/DiSLProject2022/src-profiler/ex1/Instrumentation.java b/DiSLProject2022/src-profiler/ex1/Instrumentation.java
index 8562abe..9fbfad1 100644
--- a/DiSLProject2022/src-profiler/ex1/Instrumentation.java
+++ b/DiSLProject2022/src-profiler/ex1/Instrumentation.java
@@ -1,4 +1,27 @@
 package ex1;
 
+import ch.usi.dag.disl.annotation.After;
+import ch.usi.dag.disl.annotation.Before;
+import ch.usi.dag.disl.annotation.SyntheticLocal;
+import ch.usi.dag.disl.marker.BodyMarker;
+import ch.usi.dag.disl.staticcontext.MethodStaticContext;
+
 public class Instrumentation {
+
+    @SyntheticLocal
+    static long entryTimestamp;
+
+    @Before(marker = BodyMarker.class, scope = "ex1.MainThread.factorial")
+    static void beforeMethod() {
+        entryTimestamp = System.nanoTime();
+    }
+
+    @After(marker = BodyMarker.class, scope = "ex1.MainThread.factorial")
+    static void afterMethod(final MethodStaticContext ctx) {
+        final long endTimestamp = System.nanoTime();
+        System.out.printf("%s - Execution time for %s: %d ns%n",
+                Thread.currentThread().getName(),
+                ctx.getUniqueInternalName(),
+                endTimestamp - entryTimestamp);
+    }
 }