Certain subscriptions may overload clients

[BasixKOR]

Description

After switching from nodeStatus.tip.index to tipChanged subscription, 9c-launcher has experienced severe performance issues due to too frequent subscription responses.

Although this is not a bug per se, it may help if we could introduce a way to limit the frequency of the response of these subscriptions such as throttling etc.

Reproduction

Using Apollo Client with React, assuming the basic configuration is completed, this snippet will cause the application to be stuck for a while.

import { useSubscription, gql } from "@apollo/client";

const TIP_SUBSCRIPTION = gql`
subscription Tip {
  tipChanged {
    index
  }
}
`;

function Component() {
  useSubscription(TIP_SUBSCRIPTION);
  return null;
}

Executed environment

• Docker (tag: )
• Through dotnet run (commit: ...(e.g. ))
• Through NineChronicles launcher (version: ... (e.g. v1000080)): around v100200

Executed GraphQL query

subscription Tip {
  tipChanged {
    index
  }
}

Expected behaviour

We could let the client limit the frequency by passing some arguments.

Additional context

This subscription has been introduced for easing the load of an RPC server.

[BasixKOR]

Update on the issue: the launcher currently circumvents this issue via handling the updates manually and scheduling them. See planetarium/9c-launcher#1536 for details.

[moreal]

I'm so sorry because it has taken too long time. I fixed it in #2245 PR.