Serious memory leak issue with the devtools extension about apollo-client-devtools

[alessbell]

Thanks for opening this issue @hehaijin, and I'm sorry you're facing this. Please feel free to open that PR - we're working on a few different things as a team but a memory leak like this is something we'll prioritize as soon as possible. Thanks!

[hehaijin]

posting screen shots here.
the memory tab

[hehaijin]

the memory snapshot showing promises occupy most of the space.

and inside promise it's most the client data.

[hehaijin]

The extension has been un-usable for us for a while so
I did some digging and it seems related to this async function

async function getClientData() {
    if (panelWindow) {
      panelWindow.send({
        type: "update",
        payload: await rpcClient.request("getClientOperations"),
      });
    }
  }

not sure why it would affect Garbage collection.
but the result seems that every time the client data is copied to extension,
it would be not get GCed. and since the data is copied every 0.5s,
it would quickly exhaust memory.

[hehaijin]

Made some local changes and seems the issue goes away.
would be happy to make a Pull request to fix this.

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