sol-trade-sdk/RELEASE_v3.6.3.md

Release v3.6.3

Changes from v3.6.2

Parallel multi-SWQoS submit

• Transaction builder pool: Introduced PARALLEL_SENDER_COUNT (18) and ensured pool prefill is at least 18, so that when using dedicated sender threads all channels can acquire a builder without waiting or allocating. Prefill is now 64 with a guaranteed minimum of 18.
• Async executor: Documented that builder pool prefill must match the dedicated sender thread count so multi-channel submit never serializes on build_transaction.
• Executor logging: Submit timings are no longer sorted before printing (avoids any extra work on the hot path). Log order reflects completion order (first-completed first); the last line is the slowest channel in that batch.

Other

• Added docs/ASYNC_EXECUTOR_REVIEW.md.
• Minor updates in types, lib, params, and middleware example.