feat(udp): return borrowed Datagram on receive #2188
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This was referenced Oct 17, 2024
mxinden
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Oct 17, 2024
mxinden
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KershawChang,
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larseggert
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I'll defer to @larseggert on this part. As far as I can see, it's good.
Previously `recv_inner` would return `Datagram<Vec<u8>>`. In other words, it would allocate a new `Vec<u8>` for each UDP datagram payload. Now `recv_inner` reads into a provided buffer and returns `Datagram<&[u8]>`, i.e. it returns a view into the provided buffer without allocating.
Pass a long lived receive buffer to `neqo_udp::recv_inner`, receiving an iterator of `Datagram<&[u8]>`s pointing into that buffer, thus no longer allocating in UDP receive path.
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larseggert
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Oct 21, 2024
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Stacked on top of #2187 which is stacked on top of #2184.
Previously
recv_innerwould returnDatagram<Vec<u8>>. In other words, it would allocate a newVec<u8>for each UDP datagram payload.Now
recv_innerreads into a provided buffer and returnsDatagram<&[u8]>, i.e. it returns a view into the provided buffer without allocating.Extracted out of #2093.
Part of #1693.
Pull request stack: