chore: release v0.0.22

[sw-release-bot]

🤖 New release

• structured-zstd: 0.0.21 -> 0.0.22

Changelog

0.0.22 - 2026-05-19

Added

• (encoder) strategy-aware literal gates (G4 + G5) (#182)
• (bench) perf(encoding): early incompressible fast-path + benchmark parity #99 Rust↔FFI sequence-stream comparator (#149)

Documentation

• bump quick-start dep version to 0.0.21 + drop legacy ruzstd Changelog.md (#155)

Performance

• (decode) pack LL/ML metadata + hot-path micro-opts (#197)
• (decode) fused sequence executor + SIMD/FSE hot-path cleanup + DoS-safe rollback (#194)
• (encoder) align Fast strategy window_log with donor (17 → 19) (#187)
• (encoder) inline hash-chain walk into hash_chain_candidate (lazy L1) (#185)
• (encoder) G3 — whole-block bail-out before partition split (#181)
• (encoder) donor-parity greedy parse at L4 — ratio + speed win (#179)
• (huff0) cache encoded weight-description bytes on HuffmanTable and reuse in emit path (#170)
• (huff0) perf(huff0): donor HUF_optimalTableLog fast-path single-shot tableLog with cheap description-size proxy #167 cheap entropy proxy for table_log selection — no FSE-encode per candidate (#168)
• (fse) donor FSE_buildCTable_wksp parity — drop per-symbol Vec (#166)
• (fse) replace next_state linear search with donor-parity flat tables + tune CI bench budgets (#165)

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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[sw-release-bot]

⚠️ Performance Alert ⚠️

Possible performance regression was detected for benchmark 'structured-zstd vs C FFI (x86_64-gnu)'.
Benchmark result of this commit is worse than the previous benchmark result exceeding threshold 1.30.

Benchmark suite	Current: fb2c1d6	Previous: 1e0f695	Ratio
compress/level_22_btultra2/small-4k-log-lines/matrix/c_ffi	0.112 ms	0.067 ms	1.67
compress/level_22_btultra2/decodecorpus-z000033/matrix/c_ffi	236.081 ms	171.961 ms	1.37

This comment was automatically generated by workflow using github-action-benchmark.

CC: @polaz