Question: What could be causing this latency?

[joaquinjsb]

Hello, I'm having some latency issues with my SCG MVC, I'm running on 4.3.0, latency is pretty high in most of the requests that are routed through the gateway, the ping and the network between the two services is good, it's on the same LAN in DC, ping is <1ms.

the route is something as simple as

return  GatewayRouterFunctions.route(authService)
      .route(host(gatewayHostname).and(path("/service-path/**")), HandlerFunctions.http(uri))
				.before(BeforeFilterFunctions.stripPrefix(1))
                                .filter(tokenRelay())
      .build()

the upstream server takes 343ms, but the full gateway response takes 1.13s

same thing is happening on my local machine, may need to try with a reproducer if possible soon.

I have attached a full grafana trace, with sensitive data redacted, follow this steps to visualize it:

1. go to https://play.grafana.org/goto/EnS0xlyNR?orgId=1 (no need for account)
2. click on Import trace
3. upload the json trace Trace-d04d00-2025-07-09 15_57_06.json
4. you should be able to visualize data

do you guys have any tip / suggestion to what else could I check?

thanks