useTime duration calculation (#2651)

Co-authored-by: tzehaoo <[email protected]>
Co-authored-by: ofekshenawa <[email protected]>

Author: 3 people

Diff for: extra/redisotel/metrics.go

@@ -193,11 +193,13 @@ func (mh *metricsHook) DialHook(hook redis.DialHook) redis.DialHook {
 
 		conn, err := hook(ctx, network, addr)
 
+		dur := time.Since(start)
+
 		attrs := make([]attribute.KeyValue, 0, len(mh.attrs)+1)
 		attrs = append(attrs, mh.attrs...)
 		attrs = append(attrs, statusAttr(err))
 
-		mh.createTime.Record(ctx, milliseconds(time.Since(start)), metric.WithAttributes(attrs...))
+		mh.createTime.Record(ctx, milliseconds(dur), metric.WithAttributes(attrs...))
 		return conn, err
 	}
 }