perf: reduce packet buffer slicing churn (#2381)

mirror of https://github.com/EasyTier/EasyTier.git synced 2026-09-02 09:09:17 +00:00

* bench: add packet bytes extraction Criterion benchmark

Adds a Criterion benchmark under easytier/benches/ covering
ZCPacket::payload_bytes and tunnel_payload_bytes at 1280/4096-byte payload
sizes, using iter_batched so ZCPacket construction stays in the setup phase
and is excluded from the timed region.

- Register the [[bench]] entry in easytier/Cargo.toml.
- Document the bench and PACKET_BYTES_* env vars in benches/README.md.

* perf: reduce packet buffer slicing churn

Replace BytesMut::split_off with Buf::advance in ZCPacket bytes
extraction paths (payload_bytes, tunnel_payload_bytes, convert_type,
drop_foreign_header) and in TunZCPacketToBytes, and simplify the
copy_from_slice in new_from_payload.

When the buffer is in its unique (VEC) representation, split_off promotes
it to the shared (ARC) representation, allocating a Shared control block
and bumping the refcount on every call, and pins the buffer in shared
mode. advance only mutates the in-place ptr/len/cap fields, avoiding that
allocation/refcount churn on the TX hot path. The byte data itself is not
copied by either path.

This commit is contained in:

fanyang

2026-07-01 23:19:34 +08:00

committed by

GitHub

parent 7756a15cbe

commit f24735a86f

5 changed files with 130 additions and 11 deletions

									
										easytier/Cargo.toml
									
		+4
		
												View File
												
				@@ -32,6 +32,10 @@ path = "src/lib.rs"

				name = "tx_throughput"

				harness = false

				[[bench]]

				name = "packet_bytes_extraction"

				harness = false

				[dependencies]

				git-version = "0.3.9"