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Re:Web scraping via JavaScript runtime heap snapshots by marwis on Friday April 29, 2022 @06:48PM (#31211490)
Not aware of any actual grpc websites but given grpc-web has 6.5k stars on github something must be out there.

Google's websites frequently use binary-like formats where json is just an array of values with no properties, and most of these values are numbers. See for example Gmail.

Re:Web scraping via JavaScript runtime heap snapshots by kccqzy on Friday April 29, 2022 @11:26PM (#31213091)
That's likely just an encoding into JSON of protobuf messages. The typical wire format contains a sequence of field tag followed by contents. They can just make it an even-sized array.