Poh using mpsc ringbuf #12681

Job	Run time
check	2m 10s
cargo-test-sbf (token/program)	8m 3s
cargo-test-sbf (instruction-padding/program, token/program-2022, token/program-2022-test)	13m 49s
cargo-test-sbf (associated-token-account/program, associated-token-account/program-test)	9m 16s
test (token/cli, token/program, token/program-2022, associated-token-account/program, instruction...	6h 0m 15s
cargo-test-sbf (token-upgrade/program)	8m 59s
test (single-pool/cli, single-pool/program)	6h 0m 16s
cargo-test-sbf (feature-proposal/program)	7m 34s
test (token-upgrade/cli, token-upgrade/program)	6h 0m 14s
cargo-test-sbf (governance/addin-mock/program, governance/program)	12m 8s
cargo-test-sbf (memo/program)	8m 30s
cargo-test-sbf (name-service/program)	7m 33s
cargo-test-sbf (stake-pool/program)	13m 13s
cargo-test-sbf (single-pool/program)	8m 40s
	19h 40m 40s

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