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One of the things I’m happy about in our UDP sockets implementation is socket#sendMany. Internally, it uses sendmmsg on Linux and the undocumented sendmsg_x API on macOS which let you send multiple datagrams to multiple addresses in a single system call. Internally we do this automatically when reading messages (recvmmsg / recvmsg_x)
No, it’s because almost nobody has enough patience to upload a crash report for a GitHub issue. It has to be easy. Making it a URL that autofills the form with almost everything we need makes it easy. The size matters too, we didn’t want it to have downsides for our users, but the important thing is making this whole process really easy for the user so that enough developers actually upload crash reports.