Question: What could be causing this latency?

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

Start with the reported GatewayRouterFunctions route and compare the 343 ms upstream time with the 1.13 s full gateway response. Inspect the attached Grafana trace and reproduce the request locally on version 4.3.0 if possible. Done would mean identifying the source of the added latency and documenting a reproducible cause or confirming the required next diagnostic step.