statsig-rust

Breaking Changes

• N/A

New Features

• Node.js:
  • getAutotuneList() — enumerate autotune configs, matching the existing gate/config/experiment/parameter-store list methods.
  • getExperimentByGroupIdAdvanced() — completes the experiment group-targeting API set (getExperimentByGroupName / overrideExperimentByGroupName already
    existed).
• Java:
  • getAutotuneList() — enumerate autotune configs, matching the existing entity-list methods.
• Python:
  • get_autotune_list() — enumerate autotune configs.
  • get_experiment_by_group_name() and get_experiment_by_group_id_advanced() — experiment group-targeting getters.
• Rust:
  • New id_lists_request_timeout_ms StatsigOption — configurable per-request timeout for ID list manifest fetches and downloads (previously hardcoded to 10s;
    default unchanged when unset). Exposed in all SDK bindings.
• .NET:
  • GetAutotuneList() — enumerate autotune configs.
  • GetExperimentByGroupName() and GetExperimentByGroupIdAdvanced() — experiment group-targeting getters.
• Elixir:
  • get_autotune_list/0 — enumerate autotune configs.
  • get_experiment_by_group_name, get_experiment_by_group_id_advanced, and override_experiment_by_group_name — experiment group-targeting APIs.
• Go:
  • Entity-list methods: GetFeatureGateList, GetDynamicConfigList, GetExperimentList, GetAutotuneList, GetParameterStoreList.
  • Experiment group-targeting APIs: GetExperimentByGroupName, GetExperimentByGroupIDAdvanced, OverrideExperimentByGroupName.
  • WithObservabilityClient on StatsigOptionsBuilder — observability clients were previously silently dropped when configured.
• PHP:
  • getAutotuneList() — enumerate autotune configs.
  • getExperimentByGroupName() and getExperimentByGroupIdAdvanced() — experiment group-targeting getters.
• C++:
  • getAutotuneList() — enumerate autotune configs.
  • getExperimentByGroupName, getExperimentByGroupIdAdvanced, and overrideExperimentByGroupName — experiment group-targeting APIs.

Improvements & Fixes

• Node.js: N/A
• Java: N/A
• Python: N/A
• Rust: N/A
• .NET: N/A
• Elixir: N/A

Included In This Release

• 57f8cb2 statsig-kong[bot]
  • chore: bump version to 0.19.9-rc.2607090504
• 4bdd820 Xin Li (Bot)
  • [automated] sync rc with main
• a2f52f8 statsig-kong[bot]
  • [automated] chore: bump version to 0.19.9-beta.2607090302 (#3037)
• 6079d5d Peter Zhu
  • fix(php): warm allocator before baselining MemoryLeakTest RSS (#3016)
• 49dceae Peter Zhu
  • [S2SDK-124] python: add experiment group-targeting getters (#3026)
• 7be0809 Peter Zhu
  • [S2SDK-125] dotnet: add experiment group-targeting getters (#3029)
• fc57107 Peter Zhu
  • [S2SDK-126] php: add experiment group-targeting getters (#3024)
• a67dfd0 Peter Zhu
  • [S2SDK-128] elixir: expose experiment group-targeting APIs (#3027)
• 9919da7 Peter Zhu
  • [S2SDK-127] cpp: expose experiment group-targeting APIs (#3025)
• a14cda0 Peter Zhu
  • [S2SDK-108] go: expose WithObservabilityClient on StatsigOptionsBuilder (#3028)
• 50a1cfa statsig-kong[bot]
  • [automated] chore: bump version to 0.19.9-beta.2607080301 (#3035)
• 97fa17a Peter Zhu
  • [S2SDK-123] node: expose getExperimentByGroupIdAdvanced (#3023)
• 29734ee Peter Zhu
  • [S2SDK-82] php: expose getAutotuneList (#3011)
• d0137c0 Peter Zhu
  • [S2SDK-85] python: add get_autotune_list test (#3022)
• 95801b4 Peter Zhu
  • [S2SDK-84] node: add getAutotuneList test (#3021)
• 03cf5fe Peter Zhu
  • [S2SDK-81] dotnet: expose GetAutotuneList (#3012)
• 270de40 Peter Zhu
  • [S2SDK-45] Make ID list request timeout configurable (#3015)
• 993fd58 Peter Zhu
  • [S2SDK-83] cpp: expose getAutotuneList (#3010)
• a280ad3 statsig-kong[bot]
  • [automated] chore: bump version to 0.19.9-beta.2607020303 (#3031)
• e5b3266 Peter Zhu
  • [S2SDK-87] elixir: expose autotune list (#3009)
• e6d2b2f Peter Zhu
  • [S2SDK-86] java: expose getAutotuneList (#3008)
• 1bd2cf6 Peter Zhu
  • fix(ci): strip debug info from rust test build to stop linker Bus error (#3017)
• 1e53250 Peter Zhu
  • [S2SDK-85] python: expose get_autotune_list (#3007)
• 17bb201 Peter Zhu
  • [S2SDK-84] node: expose getAutotuneList (#3006)
• c1d8ade Peter Zhu
  • [S2SDK-77] core: add get_autotune_list test (binding-parity baseline) (#3005)
• 1e48297 Peter Zhu
  • [S2SDK-71] Go: expose gate/experiment/dynamic-config/autotune/parameter-store list methods (#3000)
• f44f8fb statsig-kong[bot]
  • [automated] chore: bump version to 0.19.9-rc.2607010924 (#3020)
• b3070ef statsig-kong[bot]
  • chore: bump version to 0.19.9-rc.2607010923
• b4c5713 statsig-kong[bot]
  • [automated] sync rc with main (#3019)
• eb8ae01 Xin Li (Bot)
  • [automated] sync rc with main

Full Changelog: 0.19.8...0.20.0

Breaking Changes

New Features

• Node.js:
• Java:
• Python: Support for mTLS/TLS with proxy configs
• Rust:
• .NET:
• Elixir:

Improvements & Fixes

• Node.js:
• Java:
• Python:
• Rust:
• .NET:
• Elixir:
• Cross Platform: Performance improvements from lock contention with high-qps evaluation

Included In This Release

• aa71173 statsig-kong[bot]
  • chore: bump version to 0.19.7-rc.2606232102
• 58ed600 Xin Li (Bot)
  • [automated] sync rc with main
• c64a4ff Sandeep Madugula
  • [S2SDK-16] Fix Core SDK high-QPS lock contention on eval hot path (#2994)
• 6b4d7dd statsig-kong[bot]
  • [automated] chore: bump version to 0.19.7-beta.2606190306 (#2993)
• aa20268 Kenneth Yeh
  • fix(cli): make dotnet nuget push idempotent with --skip-duplicate (#2990)
• 8220c87 statsig-kong[bot]
  • [automated] chore: bump version to 0.19.7-beta.2606180304 (#2992)
• 994bd13 Kenneth Yeh
  • [S2SDK-54] Python: expose SpecAdapterConfig TLS/mTLS auth settings (#2981)
• 3b631f8 statsig-kong[bot]
  • [automated] chore: bump version to 0.19.6-rc.1 (#2989)
• 79b6b9b statsig-kong[bot]
  • [automated] chore: bump version to 0.19.6-beta.2606170305 (#2987)
• c9afd04 statsig-kong[bot]
  • [automated] chore: bump version to 0.19.6-rc.2606161624 (#2986)
• 53bc284 statsig-kong[bot]
  • [automated] sync rc with main (#2985)

Full Changelog: 0.19.6...0.19.7

Breaking Changes

New Features

• Node.js:
• Java:
• Python:
• Rust:
• .NET:
• Elixir:

Improvements & Fixes

• Node.js:

• Java:

• Python:

• Rust:

• .NET:

• Elixir:

• Go: Add WithoutUserId() to StatsigUser builders to represent users with no userId value in go

• Cross Platform: fixed shutdown() to now flush pending events before completing

Included In This Release

• 34c9b3f statsig-kong[bot]
  • chore: bump version to 0.19.6-rc.2606161623
• 7e4a732 Xin Li (Bot)
  • [automated] sync rc with main
• e63b32d Sandeep Madugula
  • S2SDK-12: Flush inflight events before shutdown (#2977)
• ca2ac18 statsig-kong[bot]
  • [automated] chore: bump version to 0.19.6-rc.2606151903 (#2984)
• 1b855ae Xin Li
  • fix scheduled rc release (#2958)
• bb08a93 statsig-kong[bot]
  • chore: bump version to 0.19.6-rc.2606151902
• 880a1e9 statsig-kong[bot]
  • [automated] sync rc with main (#2983)
• b0f271d Xin Li (Bot)
  • [automated] sync rc with main
• 5aa0c46 statsig-kong[bot]
  • [automated] chore: bump version to 0.19.6-beta.2606100304 (#2980)
• 5cb6593 statsig-kong[bot]
  • [automated] chore: bump version to 0.19.5-rc.1 (#2979)
• 94c6194 Kenneth Yeh
  • [Go-lang] add WithoutUserID to represent nil userID (#2976)
• 50ecd8e statsig-kong[bot]
  • [automated] chore: bump version to 0.19.5-beta.2606060303 (#2975)
• 8b274eb Kenneth Yeh
  • ci: fix rc bump minimum-release-age exclude to cover all node-core platform binaries (#2974)
• 8899938 statsig-kong[bot]
  • [automated] chore: bump version to 0.19.5-rc.2606050349 (#2973)
• 519b6b6 statsig-kong[bot]
  • [automated] sync rc with main (#2972)

Full Changelog: 0.19.5...0.19.6

Breaking Changes

New Features

• Node.js:
• Java:
• Python:
• Rust:
• .NET:
• Elixir:

Improvements & Fixes

• Node.js:
• Java:
• Python:
• Rust:
• .NET:
• Elixir:
• Go: bound exposure dedupe set with LRU to prevent unbounded memory growth

Included In This Release

• e340b20 statsig-kong[bot]
  • chore: bump version to 0.19.5-rc.2606050348
• 73149f6 Xin Li (Bot)
  • [automated] sync rc with main
• 3784372 Kenneth Yeh
  • Revert "[release] 0.19.4-rc.2606032339" — restore RC version ordering (#2970)
• 35cb4d3 statsig-kong[bot]
  • [automated] chore: bump version to 0.19.4-beta.2606050304 (#2971)
• d15ae18 Kenneth Yeh
  • ci: restore nightly beta cron schedule (#2956)
• cfc79fb Kenneth Yeh
  • [release] 0.19.4-rc.2606032339 - (#2968)
• f96a778 Kenneth Yeh
  • ci: fix rc bump workflow (alias syntax + bypass minimumReleaseAge + Node 24) (#2960)
• 30c99df Sandeep Madugula
  • S2SDK-1: [memory leak Fix] bound exposure dedupe set with LRU to prevent unbounded memory growth (#2966)
• 7cdedcd Kenneth Yeh
  • Revert "chore: configure workflow to support NPM Trusted Publishing" (#2967)
• 1214f9a statsig-kong[bot]
  • [automated] chore: bump version to 0.19.4-rc.1 (#2964)
• bfe96a6 Kenneth Yeh
  • fix: send User-Agent header in rust package verification crates.io request (#2962)
• 9144623 Daniel Graham
  • chore: configure workflow to support NPM Trusted Publishing (#2959)
• 12fcf11 Kenneth Yeh
  • ci: restore missing uses: refs in node_core_rc_bump workflow (#2957)
• 13a62a0 statsig-kong[bot]
  • [automated] chore: bump version to 0.19.4-beta.2605212203 (#2955)
• 8315438 statsig-kong[bot]
  • [automated] chore: bump version to 0.19.4-rc.2605212136 (#2954)
• d4db804 statsig-kong[bot]
  • [automated] sync rc with main (#2953)

Full Changelog: 0.19.4...0.19.5

Breaking Changes

• N/A

New Features

• Node.js: N/A
• Java: N/A
• Python: N/A
• Rust: N/A
• .NET: N/A
• Elixir: N/A

Improvements & Fixes

• Node.js: Inherits core layer-sampling fix and evaluator performance improvements.
• Java: Inherits core layer-sampling fix and evaluator performance improvements.
• Python:
  • Fix numeric coercion for large integer user.custom values that previously broke evaluation.
  • Faster typed DynamicConfig/Experiment accessors (get_string, get_integer, get_float, get_bool, get_array, get_object) — up to ~37% faster per call.
  • Inlined the error-boundary wrapper to remove per-call overhead — ~8–17% faster gate/config/experiment/layer evaluation.
• Rust:
  • Layers now pull the sampling rate from the experiment's rule in the config-delegate case.
  • Removed hash-input allocations in the evaluator hot path (~5–9% faster checks).
  • Skip SDK event-listener lookups when no listeners are subscribed.
• .NET: Inherits core layer-sampling fix and evaluator performance improvements.
• Elixir: Preserve user.custom integers above i64::MAX (fall back to f64) instead of raising in the NIF.

Included In This Release

• 8527686 statsig-kong[bot]
  • chore: bump version to 0.19.4-rc.2605212134
• 99e6fd0 Xin Li (Bot)
  • [automated] sync rc with main
• f1c32a6 Kenneth Yeh
  • fix(elixir): preserve user.custom integers above i64::MAX (#2951)
• cd82c4b Kenneth Yeh
  • Fix pyo3 numeric coercion (#2950)
• 8c863c2 statsig-kong[bot]
  • [automated] chore: bump version to 0.19.3-rc.1 (#2948)
• d8a7643 Daniel
  • fix: allow floating point in proto specs (#2944)
• a29d7ab sroyal-statsig
  • Layer Sampling Update (#2943)
• 707d966 Daniel
  • Bc per user py (#2942)
• 47cac3e statsig-kong[bot]
  • [automated] chore: bump version to 0.19.3-beta.2604211739 (#2941)
• cb418de Daniel
  • Update nightly-beta.yml (#2940)
• 69914d9 Daniel
  • [codex] Remove evaluator hash input formatting allocations (#2933)
• 8a63304 Daniel
  • [codex] Skip SDK event listener lookups when unsubscribed (#2934)
• ad356ad Daniel
  • [codex] Fast path typed DynamicConfig accessors (#2936)
• f724e74 Daniel
  • [codex] Inline Python error boundary wrapper (#2935)
• 2edfe62 xinlili-oai
  • ci: disable cut release candidate and nightly beta workflows (#2939)
• bfff8e0 statsig-kong[bot]
  • [automated] chore: bump version to 0.19.3-beta.2604160313 (#2931)
• 1f5f5d4 xinlili-oai
  • Fix main flow (#2929)
• f2c3aba statsig-kong[bot]
  • [automated] chore: bump version to 0.19.2-rc.1 (#2928)
• 538391b statsig-kong[bot]
  • [automated] chore: bump version to 0.19.2-rc.2604152158 (#2926)
• 1b0a9bd statsig-kong[bot]
  • [automated] sync rc with main (#2925)

Full Changelog: 0.19.1...0.19.4