diff --git a/demo.txt b/demo.txt
index 758150e..e8c0017 100644
--- a/demo.txt
+++ b/demo.txt
@@ -1,10 +1,10 @@
 LD_LIBRARY_PATH="$(pwd):$LD_LIBRARY_PATH" ./awsmrt ../tests/test_fibonacci_multiple.json
 
 
-# fib(40)
+# fib(20)
 
-ab -n 10000 -c 1000 -p post_body.txt -v 4 localhost:10000/
+ab -n 100000 -c 100 -p post_body.txt -v 4 localhost:10000/
 
 # fib(10)
 
-ab -n 1000 -c 100 -p post_body2.txt -v 4 localhost:10001/
\ No newline at end of file
+ab -n 100000 -c 100 -p post_body2.txt -v 4 localhost:10001/
\ No newline at end of file
diff --git a/post_body.txt b/post_body.txt
index 597975b..2edeafb 100644
--- a/post_body.txt
+++ b/post_body.txt
@@ -1 +1 @@
-35
\ No newline at end of file
+20
\ No newline at end of file
diff --git a/runtime/src/sandbox.c b/runtime/src/sandbox.c
index a95d67f..fd76463 100644
--- a/runtime/src/sandbox.c
+++ b/runtime/src/sandbox.c
@@ -142,10 +142,11 @@ sandbox_build_and_send_client_response(struct sandbox *sandbox)
 
 done:
 	assert(sndsz == sandbox->request_response_data_length);
-	sandbox->total_time    = __getcycles() - sandbox->start_time;
+	uint64_t end_time      = __getcycles();
+	sandbox->total_time    = end_time - sandbox->start_time;
 	uint64_t total_time_us = sandbox->total_time / runtime_processor_speed_MHz;
 
-	printf("%s():%d, %d, %lu\n", sandbox->module->name, sandbox->module->port,
+	printf("%s():%d, %u, %lu\n", sandbox->module->name, sandbox->module->port,
 	       sandbox->module->relative_deadline_us, total_time_us);
 
 #ifndef USE_HTTP_UVIO
diff --git a/runtime/tests/test_fibonacci_multiple.json b/runtime/tests/test_fibonacci_multiple.json
index ca31327..c64899d 100644
--- a/runtime/tests/test_fibonacci_multiple.json
+++ b/runtime/tests/test_fibonacci_multiple.json
@@ -3,7 +3,7 @@
   "name": "fibonacci",
   "path": "fibonacci_wasm.so",
   "port": 10000,
-  "relative-deadline-us": 50000000,
+  "relative-deadline-us": 80000,
   "argsize": 1,
   "http-req-headers": [],
   "http-req-content-type": "text/plain",
@@ -17,7 +17,7 @@
   "name": "fibonacci2",
   "path": "fibonacci_wasm.so",
   "port": 10001,
-  "relative-deadline-us": 50000,
+  "relative-deadline-us": 8000,
   "argsize": 1,
   "http-req-headers": [],
   "http-req-content-type": "text/plain",