George Barnett 4dfae01cc6 Add a pooled recv buffer allocator (#2362) ... Motivation: Channels can read `ChannelOptions.maxMessagesPerRead` times from a socket in each read cycle. They typically re-use the same buffer for each read and rely on it CoWing if necessary. If we read more than once in a cycle then we may CoW the buffer. Instead of reusing one buffer we can reuse a pool of buffers limited by `maxMessagesPerRead` and cycle through each, reducing the chance of CoWing the buffers. Modifications: - Extend `RecvByteBufferAllocator` to provide the size of the next buffer with a default implementation returning `nil`. - Add an recv buffer pool which lazily grows up to a fixed size and attempts to reuse buffers where possible if doing so avoids CoWing. Results: Fewer allocations		2023-02-20 17:00:19 +00:00
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Dockerfile	Raise minimum supported Swift version from 5.4 to 5.5 (#2267)	2022-09-29 11:47:44 +01:00
docker-compose.2004.55.yaml	Add a pooled recv buffer allocator (#2362)	2023-02-20 17:00:19 +00:00
docker-compose.2004.56.yaml	Add a pooled recv buffer allocator (#2362)	2023-02-20 17:00:19 +00:00
docker-compose.2204.57.yaml	Add a pooled recv buffer allocator (#2362)	2023-02-20 17:00:19 +00:00
docker-compose.2204.58.yaml	Add a pooled recv buffer allocator (#2362)	2023-02-20 17:00:19 +00:00
docker-compose.2204.main.yaml	Add a pooled recv buffer allocator (#2362)	2023-02-20 17:00:19 +00:00
docker-compose.yaml	Validate missing imports in CI (#2245)	2022-08-15 10:26:34 -07:00