A small number of API requests to your microservices-based application take a very long time.

Set timeouts on your application so that you can fail requests faster.

Send custom metrics for each of your requests to Stackdriver Monitoring.

Use Stackdriver Monitoring to look for insights that show when your API latencies are high.

Instrument your application with Stackdnver Trace in order to break down the request latencies at each microservice.