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x/tools/gopls: allow parallel request processing #32629
Currently all requests (e.g. signatureHelp, hover, complete, documentHighlight, etc) are processed synchronously, meaning they block subsequent requests/notifications. This includes the time they spend parsing and type checking, which can be significant. In particular, this is wasteful when a new didChange event comes in, since that "should" cancel all in-flight requests for that package, but currently it has to wait for them all to finish.
When gopls is ready for the extra complexity, @ianthehat says that these requests can change to do most of their work asynchronously.