Update README.md

README.md

@@ -44,12 +44,12 @@ class EndpointHandler:
         start = perf_counter()
         prediction = self.pipeline(inputs)
         end = perf_counter()
-        delta = end - start
+        latency = end - start
 
         return {
             "labels": prediction.labels, 
             "scores": prediction.scores,
-            "latency (secs.)": str(delta)
+            "latency (secs.)": latency
         }
 ```