enricobuehler
9c86f667ca
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The host sealed every packet with ~3 heap allocations: aes-gcm's convenience encrypt() allocates the ciphertext Vec, seal_for_wire allocates the seq||ct||tag wire Vec, and seal_frame allocated a fresh Vec<Vec<u8>> per frame. At line rate (~250k–500k pkt/s for 2.5–5 Gbps) that's the single-core allocator wall. - SessionCrypto::seal_in_place uses AeadInPlace::encrypt_in_place_detached to encrypt into the caller's buffer and write the detached tag at the end — byte-identical to seal's ciphertext||tag, no allocation (unit-tested for byte equality + decrypt). - Session keeps a wire_pool the caller returns via reclaim_wires; seal_frame seals each packet in place into the reused buffers (clear() keeps capacity), so after warmup there's no per-packet ciphertext/wire allocation. paced_submit and submit_frame reclaim the pool after sending. End-to-end encrypted/lossless multi-frame tests stay green (validates the pool reuse doesn't corrupt across frames). Next: write packetize directly into a contiguous send buffer (kills the remaining shard allocs + GSO's coalescing copy). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>