3 All notable changes to this project will be documented in this file.
5 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
6 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
10 ## [3.1.25] - 2024-03-27
14 - Fix publishing on JSR, take 2.
16 ## [3.1.24] - 2024-03-27
20 - Fix publishing on JSR.
22 ## [3.1.23] - 2024-03-27
28 ## [3.1.22] - 2024-03-15
32 - Fix pool event emitter registered callbacks removal at `destroy()`.
34 ## [3.1.21] - 2024-02-22
38 - Fix null exception regression: [#1496](https://github.com/poolifier/poolifier/issues/1496).
40 ## [3.1.20] - 2024-02-11
44 - Ensure `worker_threads` workers are unreferenced at termination.
46 ## [3.1.19] - 2024-01-16
50 - Fix possible null exception at task finishing handling.
54 - Optimize Deque implementation to improve tasks queueing performance.
56 ## [3.1.18] - 2024-01-06
60 - Fix dynamic pool with minimum number of workers set to zero: [#1748](https://github.com/poolifier/poolifier/issues/1748).
62 ## [3.1.17] - 2024-01-05
66 - Improve performance by clean up unneeded condition checks on hot code paths.
68 ## [3.1.16] - 2024-01-03
72 - Add missing type to TS type definitions.
74 ## [3.1.15] - 2024-01-02
78 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
80 ## [3.1.15-0] - 2024-01-02
84 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
86 ## [3.1.14] - 2024-01-01
90 - Properly handle dynamic pool with zero minimum size.
92 ## [3.1.13] - 2023-12-30
96 - Reduce branching in several hot code paths.
97 - Use faster object cloning implementation.
99 ## [3.1.12] - 2023-12-27
103 - Fix tasks redistribution triggers at pool destroying.
107 - Switch TypeScript module resolution to Node16.
109 ## [3.1.12-0] - 2023-12-27
113 - Fix tasks redistribution triggers at pool destroying.
115 ## [3.1.11] - 2023-12-24
119 - Avoid worker node cross tasks stealing.
120 - Ensure only half the pool worker nodes can steal tasks.
122 ## [3.1.10] - 2023-12-23
126 - Avoid useless branching on pool type.
128 ## [3.1.9] - 2023-12-22
132 - Readd ThreadPoolOptions and ClusterPoolOptions TS type aliases to PoolOptions.
134 ## [3.1.8] - 2023-12-21
138 - Fix default worker weight computation.
139 - Fix possible null exception at pool destroying.
141 ## [3.1.7] - 2023-12-20
145 - Ensure worker choice strategies implementation wait for worker node readiness: [#1748](https://github.com/poolifier/poolifier/issues/1748).
147 ## [3.1.6] - 2023-12-18
151 - Fix pool destroying with tasks queuing enabled.
153 ## [3.1.5] - 2023-12-18
157 - Add queued tasks end timeout support to worker node termination.
159 ## [3.1.4] - 2023-12-18
163 - Make more robust the fix for possible null exception at handling task execution response.
165 ## [3.1.3] - 2023-12-17
169 - Fix possible null exception at handling task execution response.
171 ## [3.1.2] - 2023-12-17
175 - Wait for queued tasks to end at worker node termination.
177 ## [3.1.1] - 2023-12-16
181 - Fix pool options TS type definition.
183 ## [3.1.0] - 2023-12-16
187 - TypeScript breaking change: merge ThreadPoolOptions and ClusterPoolOptions types into PoolOptions type.
189 ## [3.0.14] - 2023-12-13
193 - Fix possible null exception with worker_threads pools.
195 ## [3.0.13] - 2023-12-12
199 - Ensure worker choice strategy wait for worker nodes readiness.
203 - Remove infinite retries support in worker choice strategy to avoid configuration leading to possible infinite recursion or loop.
205 ## [3.0.12] - 2023-12-12
209 - Add infinite retries support in worker choice strategy.
211 ## [3.0.11] - 2023-12-11
215 - Ensure pool asynchronous resource properly track tasks execution.
217 ## [3.0.10] - 2023-12-08
221 - Add a fastpath when tasks stealing or redistribution is impossible.
223 ## [3.0.9] - 2023-11-26
227 - Remove all pool events listener at pool destroying.
228 - Remove all worker node events listener at worker node destroying.
229 - Fix worker node event emitter listeners handling memory leak at pool options runtime change.
231 ## [3.0.8] - 2023-11-25
235 - Ensure continuous tasks stealing on idle start at worker node idling.
237 ## [3.0.7] - 2023-11-24
241 - Make continuous tasks stealing start at worker node idling.
243 ## [3.0.6] - 2023-11-24
247 - Ensure pool statuses are checked at initialization, `start()` or `destroy()`.
248 - Ensure pool `ready` event can be emitted after several `start()/destroy()` cycles.
250 ## [3.0.5] - 2023-10-27
254 - Ensure pool `ready` event can be emitted only once.
256 ## [3.0.4] - 2023-10-20
260 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
261 - Use builtin retry mechanism in worker choice strategies instead of custom one.
263 ## [3.0.3] - 2023-10-19
267 - Avoid null exception at sending message to worker.
268 - Avoid null exception at checking worker node readiness.
270 ## [3.0.2] - 2023-10-17
274 - Fix race condition at dynamic worker node task assignment and scheduled removal. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468) and [#1496](https://github.com/poolifier/poolifier/issues/1496).
276 ## [3.0.1] - 2023-10-16
280 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
284 - Switch the worker node eventing code to `EventTarget` API.
286 ## [3.0.0] - 2023-10-08
290 - Remove Node.js 16.x.x (EOL) support.
292 ## [2.7.5] - 2023-10-03
296 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
298 ## [2.7.4] - 2023-09-25
302 - Fix source maps (bundler issue).
304 ## [2.7.3] - 2023-09-24
308 - Convert pool event emitter to event emitter async resource.
310 ## [2.7.2] - 2023-09-23
314 - Add source maps to npm package to ease debugging.
318 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
320 ## [2.7.1] - 2023-09-20
324 - Ensure worker message listener used one time are removed after usage.
326 ## [2.7.0] - 2023-09-19
330 - Fix task stealing related tasks queue options handling at runtime.
334 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
338 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
339 - Stricter worker constructor arguments validation.
341 ## [2.6.45] - 2023-09-17
345 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
349 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
350 - Add `start()` method to pool API to start the minimum number of workers.
351 - Add `taskStealing` and `tasksStealingOnPressure` to tasks queue options to whether enable task stealing or not and whether enable tasks stealing under back pressure or not.
352 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
354 ## [2.6.44] - 2023-09-08
358 - Use a dedicated PAT to publish on GitHub packages registry.
362 - Publish on GitHub packages registry on release.
366 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
368 ## [2.6.43] - 2023-09-08
372 - Publish on GitHub packages registry on release.
376 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
378 ## [2.6.42] - 2023-09-06
382 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
384 ## [2.6.41] - 2023-09-03
388 - Optimize worker choice strategies implementation.
390 ## [2.6.40] - 2023-09-01
394 - Do not pre-choose in WRR worker choice strategy to avoid bias.
395 - Avoid array out of bound in worker choice strategies after worker node removal.
397 ## [2.6.39] - 2023-08-30
401 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
403 ## [2.6.38] - 2023-08-30
407 - Bundle typescript types declaration into one file.
411 - Improve interleaved weighted round robin worker choice strategy implementation.
413 ## [2.6.37] - 2023-08-28
417 - Ensure unused worker usage statistics are deleted at runtime.
421 - Rename worker choice strategy options `choiceRetries` to `retries`.
422 - Avoid unnecessary branching in worker choice strategies.
424 ## [2.6.36] - 2023-08-27
428 - Fix pool `execute()` arguments check.
432 - Make continuous tasks stealing algorithm less aggressive.
433 - Fine tune tasks stealing algorithm under back pressure.
435 ## [2.6.35] - 2023-08-25
439 - Don't account worker usage statistics for tasks that have failed.
440 - Fix pool information runtime and wait time median computation.
444 - Update simple moving average implementation to use a circular buffer.
445 - Update simple moving median implementation to use a circular buffer.
446 - Account for stolen tasks in worker usage statistics and pool information.
450 - Continuous tasks stealing algorithm.
452 ## [2.6.34] - 2023-08-24
456 - Avoid cascading tasks stealing under back pressure.
460 - Add fastpath to queued tasks rescheduling.
462 ## [2.6.33] - 2023-08-24
466 - Fix queued tasks rescheduling.
470 - Rename tasks queue options `queueMaxSize` to `size`.
474 - Task stealing scheduling algorithm if tasks queueing is enabled.
476 ## [2.6.32] - 2023-08-23
480 - Ensure no task can be executed when the pool is destroyed.
484 - Add `queueMaxSize` option to tasks queue options.
485 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
486 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
488 ## [2.6.31] - 2023-08-20
492 - Fix worker choice strategy retries mechanism in some edge cases.
496 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
497 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
499 ## [2.6.30] - 2023-08-19
503 - Ensure pool event `backPressure` is emitted.
504 - Ensure pool event `full` is emitted only once.
505 - Ensure worker node cannot be instantiated without proper arguments.
507 ## [2.6.29] - 2023-08-18
511 - Fix race condition between readiness and task functions worker message handling at startup.
512 - Fix duplicate task function worker usage statistics computation per task function.
513 - Update task function worker usage statistics if and only if there's at least two different task functions.
514 - Fix race condition at task function worker usage executing task computation leading to negative value.
518 - Add back pressure detection on the worker node queue. Event `backPressure` is emitted when all worker node queues are full (worker node queue size >= poolMaxSize^2).
519 - Use back pressure detection in worker choice strategies.
520 - Add worker choice strategies retries mechanism if no worker is eligible.
522 ## [2.6.28] - 2023-08-16
526 - Ensure pool workers are properly initialized.
530 - HTTP server pool examples: express-cluster, express-hybrid.
534 - Remove now useless branching in worker hot code path.
536 ## [2.6.27] - 2023-08-15
540 - Add `KillHandler` type definition to exported types.
544 - Add `destroy` event to pool API.
546 ## [2.6.26] - 2023-08-15
550 - Add kill handler to worker options allowing to execute custom code when worker is killed.
551 - Add `listTaskFunctions()` method to pool API.
552 - SMTP client pool example: nodemailer.
554 ## [2.6.25] - 2023-08-13
558 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
559 - WebSocket server pool examples: ws-cluster, ws-hybrid.
561 ## [2.6.24] - 2023-08-12
565 - Add array of transferable objects to the `execute()` method arguments.
566 - WebSocket server pool examples: ws-worker_threads.
568 ## [2.6.23] - 2023-08-11
572 - Fix pool busyness semantic when tasks queueing is enabled: the pool is busy when the number of executing tasks on each worker has reached the maximum tasks concurrency per worker.
576 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
577 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
579 ## [2.6.22] - 2023-08-10
583 - Add missing `types` field to package.json `exports`.
587 - Structure markdown documentation (PR #811).
589 ## [2.6.21] - 2023-08-03
593 - Improve code documentation.
594 - Code refactoring and cleanup for better maintainability and readability.
596 ## [2.6.20] - 2023-07-21
600 - Fix queued tasks redistribution on error task execution starvation.
601 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
605 - Drastically reduce lookups by worker in the worker nodes.
607 ## [2.6.19] - 2023-07-20
611 - Dedicated internal communication channel for worker_threads pools.
613 ## [2.6.18] - 2023-07-19
617 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
619 ## [2.6.17] - 2023-07-16
623 - Add `listTaskFunctions()` method to worker API.
625 ## [2.6.16] - 2023-07-12
629 - Fix pool startup detection.
630 - Fix worker task functions handling.
632 ## [2.6.15] - 2023-07-11
636 - Take into account worker node readiness in worker choice strategies.
638 ## [2.6.14] - 2023-07-10
642 - Fix task function statistics tracking.
644 ## [2.6.13] - 2023-07-10
648 - Add per task function statistics tracking.
649 - Add public methods to manipulate the worker task functions at runtime.
651 ## [2.6.12] - 2023-07-09
655 - Workaround import issue with `node:os` module in node 16.x.x.
657 ## [2.6.11] - 2023-07-09
661 - Fix pool readiness semantic.
663 ## [2.6.10] - 2023-07-08
667 - Ensure workers are not recreated on error at pool startup.
671 - Add `ready` and `strategy` fields to pool information.
672 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
673 - Add dynamic pool sizing checks.
675 ## [2.6.9] - 2023-07-07
679 - Recreate the right worker type on uncaught exception.
683 - Add minimum and maximum to internal measurement statistics.
684 - Add `runTime` and `waitTime` to pool information.
685 - Check worker inactive time only on dynamic worker.
687 ## [2.6.8] - 2023-07-03
691 - Brown paper bag release to fix version handling in pool information.
693 ## [2.6.7] - 2023-07-03
697 - Ensure worker queued tasks at error are reassigned to other pool workers.
701 - Add pool `utilization` ratio to pool information.
702 - Add `version` to pool information.
703 - Add worker information to worker nodes.
705 ## [2.6.6] - 2023-07-01
709 - Add safe helper `availableParallelism()` to help sizing the pool.
713 - Ensure message handler is only registered in worker.
715 ## [2.6.5] - 2023-06-27
719 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
723 - Artificial version bump to 2.6.5 to workaround publication issue.
724 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
725 - Ensure pool event is emitted before task error promise rejection.
726 - Fix queued tasks count computation.
730 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
732 ## [2.6.4] - 2023-06-27
736 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
740 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
741 - Ensure pool event is emitted before task error promise rejection.
742 - Fix queued tasks count computation.
746 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
748 ## [2.6.3] - 2023-06-19
752 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
753 - Update strategies internals after statistics computation.
757 - Optimize O(1) queue implementation.
759 ## [2.6.2] - 2023-06-12
763 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
765 ## [2.6.1] - 2023-06-10
769 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
773 - Fix average statistics computation: ensure failed tasks are not accounted.
775 ## [2.6.0] - 2023-06-09
779 - Add `LEAST_ELU` worker choice strategy (experimental).
780 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
784 - Refactor pool worker node usage internals.
785 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
786 - Breaking change: pool information `info` property object fields have been renamed.
790 - Fix wait time accounting.
791 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
792 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
794 ## [2.5.4] - 2023-06-07
798 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
802 - Compute statistics at the worker level only if needed.
803 - Add `worker_threads` options to thread pool options.
807 - Make the `LEAST_BUSY` strategy only relies on task runtime.
809 ## [2.5.3] - 2023-06-04
813 - Refine pool information content.
814 - Limit pool internals public exposure.
816 ## [2.5.2] - 2023-06-02
820 - Add `taskError` pool event for task execution error.
821 - Add pool information `info` property to pool.
822 - Emit pool information on `busy` and `full` pool events.
824 ## [2.5.1] - 2023-06-01
828 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
829 - Add `error` pool event for uncaught worker error.
831 ## [2.5.0] - 2023-05-31
835 - Switch pool event emitter to `EventEmitterAsyncResource`.
836 - Add tasks wait time accounting in per worker tasks usage.
837 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
841 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
843 ## [2.4.14] - 2023-05-09
847 - Ensure no undefined task runtime can land in the tasks history.
848 - Fix median computation implementation once again.
852 - Unit tests for median and queue implementations.
854 ## [2.4.13] - 2023-05-08
858 - Fix worker choice strategy options validation.
859 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
861 ## [2.4.12] - 2023-05-06
865 - Support multiple task functions per worker.
866 - Add custom worker weights support to worker choice strategies options.
870 - Use O(1) queue implementation for tasks queueing.
874 - Fix median computation implementation.
875 - Fix fair share worker choice strategy internals update.
877 ## [2.4.11] - 2023-04-23
881 - Optimize free worker finding in worker choice strategies.
883 ## [2.4.10] - 2023-04-15
887 - Fix typescript type definition for task function: ensure the input data is optional.
888 - Fix typescript type definition for pool execute(): ensure the input data is optional.
890 ## [2.4.9] - 2023-04-15
894 - Add tasks queue enablement runtime setter to pool.
895 - Add tasks queue options runtime setter to pool.
896 - Add worker choice strategy options runtime setter to pool.
900 - Remove the tasks queuing experimental status.
904 - Fix task function type definition and validation.
905 - Fix worker choice strategy options handling.
907 ## [2.4.8] - 2023-04-12
911 - Fix message between main worker and worker type definition for tasks.
912 - Fix code documentation.
914 ## [2.4.7] - 2023-04-11
918 - Add worker tasks queue options to pool options.
922 - Fix missing documentation.
924 ## [2.4.6] - 2023-04-10
928 - Ensure one task at a time is executed per worker with tasks queueing enabled.
929 - Properly count worker executing tasks with tasks queueing enabled.
931 ## [2.4.5] - 2023-04-09
935 - Use monotonic high resolution timer for worker tasks runtime.
936 - Add worker tasks median runtime to statistics.
937 - Add worker tasks queue (experimental).
939 ## [2.4.4] - 2023-04-07
943 - Add `PoolEvents` enumeration and `PoolEvent` type.
947 - Destroy worker only on alive check.
949 ## [2.4.3] - 2023-04-07
953 - Fix typedoc generation with inheritance.
955 ## [2.4.2] - 2023-04-06
959 - Add `full` event to dynamic pool.
960 - Keep worker choice strategy in memory for conditional reuse.
964 - Fix possible negative worker key at worker removal in worker choice strategies.
966 ## [2.4.1] - 2023-04-05
970 - Optimize worker choice strategy for dynamic pool.
974 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
976 ## [2.4.0] - 2023-04-04
980 - Add `LESS_BUSY` worker choice strategy.
984 - Optimize worker storage in pool.
985 - Optimize worker alive status check.
986 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
987 - Optimize `LESS_USED` worker choice strategy.
988 - Update benchmark versus external threads pools.
989 - Optimize tasks usage statistics requirements for worker choice strategy.
993 - Ensure trimmable characters are checked at pool initialization.
994 - Fix message id integer overflow.
995 - Fix pool worker removal in worker choice strategy internals.
996 - Fix package publication with pnpm.
998 ## [2.4.0-3] - 2023-04-04
1002 - Add `LESS_BUSY` worker choice strategy.
1006 - Optimize worker storage in pool.
1007 - Optimize worker alive status check.
1008 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1009 - Optimize `LESS_USED` worker choice strategy.
1010 - Update benchmark versus external threads pools.
1014 - Ensure trimmable characters are checked at pool initialization.
1015 - Fix message id integer overflow.
1016 - Fix pool worker removal in worker choice strategy internals.
1017 - Fix package publication with pnpm.
1019 ## [2.4.0-2] - 2023-04-03
1023 - Add `LESS_BUSY` worker choice strategy.
1027 - Optimize worker storage in pool.
1028 - Optimize worker alive status check.
1029 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1030 - Optimize `LESS_USED` worker choice strategy.
1034 - Ensure trimmable characters are checked at pool initialization.
1035 - Fix message id integer overflow.
1036 - Fix pool worker removal in worker choice strategy internals.
1037 - Fix package publication with pnpm.
1039 ## [2.4.0-1] - 2023-04-03
1043 - Add `LESS_BUSY` worker choice strategy.
1047 - Optimize worker storage in pool.
1048 - Optimize worker alive status check.
1049 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1050 - Optimize `LESS_USED` worker choice strategy.
1054 - Ensure trimmable characters are checked at pool initialization.
1055 - Fix message id integer overflow.
1056 - Fix pool worker removal in worker choice strategy internals.
1058 ## [2.4.0-0] - 2023-04-03
1062 - Add `LESS_BUSY` worker choice strategy.
1066 - Optimize worker storage in pool.
1067 - Optimize worker alive status check.
1068 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1069 - Optimize `LESS_USED` worker choice strategy.
1073 - Ensure trimmable characters are checked at pool initialization.
1074 - Fix message id integer overflow.
1075 - Fix pool worker removal in worker choice strategy internals.
1077 ## [2.3.10] - 2023-03-18
1081 - Fix package.json `exports` syntax for ESM and CommonJS.
1085 - Permit SemVer pre-release publication.
1087 ## [2.3.10-2] - 2023-03-18
1091 - Fix package.json `exports` syntax for ESM and CommonJS.
1093 ## [2.3.10-1] - 2023-03-18
1097 - Permit SemVer pre-release publication.
1099 ## [2.3.10-0] - 2023-03-18
1103 - Fix package.json `exports` syntax for ESM and CommonJS.
1105 ## [2.3.9] - 2023-03-18
1109 - Introduce ESM module support along with CommonJS one.
1113 - Fix brown paper bag bug referencing the same object literal.
1115 ## [2.3.8] - 2023-03-18
1119 - Switch internal benchmarking code to benny.
1120 - Switch to TypeScript 5.x.x.
1121 - Switch rollup bundler plugins to core ones.
1122 - Switch to TSDoc syntax.
1123 - Enforce conventional commits.
1127 - Fix random integer generator.
1128 - Fix worker choice strategy pool type identification at initialization.
1130 ## [2.3.7] - 2022-10-23
1134 - Switch to open collective FOSS project funding platform.
1135 - Switch to ts-standard linter configuration on TypeScript code.
1139 - Fixed missing async on pool execute method.
1140 - Fixed typing in TypeScript example.
1141 - Fixed types in unit tests.
1143 ## [2.3.6] - 2022-10-22
1147 - Cleanup pool attributes and methods.
1148 - Refine error types thrown.
1152 - Fix continuous integration build on windows.
1153 - Fix code coverage reporting by using c8 instead of nyc.
1155 ## [2.3.5] - 2022-10-21
1159 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
1160 - Optimize tasks usage lookup implementation.
1164 - Fix missed pool event emitter type export.
1165 - Fix typedoc documentation generation.
1167 ## [2.3.4] - 2022-10-17
1171 - Fully automate release process with release-it.
1175 - Optimize fair share task scheduling algorithm implementation.
1176 - Update benchmark versus external pools results with latest version.
1178 ## [2.3.3] - 2022-10-15
1182 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
1184 ## [2.3.2] - 2022-10-14
1188 - Optimize fair share worker selection strategy implementation.
1192 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
1194 ## [2.3.1] - 2022-10-13
1198 - Pool worker choice strategies:
1199 - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
1200 - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
1202 ## [2.2.2] - 2022-10-09
1206 - Fixed `README.md` file.
1208 ## [2.2.1] - 2022-10-08
1212 - Dynamic worker choice strategy change at runtime.
1214 ## [2.2.0] - 2022-01-05
1216 ### Breaking Changes
1218 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
1220 ## [2.1.0] - 2021-08-29
1224 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
1226 ### Breaking Changes
1228 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
1229 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
1230 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
1231 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
1233 ## [2.0.2] - 2021-05-12
1237 - Fix `busy` event emission on fixed pool type
1239 ## [2.0.1] - 2021-03-16
1243 - Check if pool options are properly set.
1244 - `busy` event is emitted on all pool types.
1246 ## [2.0.0] - 2021-03-01
1250 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1252 ### Breaking Changes
1254 - `FullPool` event is now renamed to `busy`.
1255 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1256 _Find more details on our JSDoc._
1258 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1260 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1262 ### Pool options types declaration merge
1264 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1266 #### New `export` strategy
1270 const DynamicThreadPool = require('poolifier/lib/dynamic')
1272 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1275 But you should always prefer just using
1278 const { DynamicThreadPool } = require('poolifier')
1281 #### New type definitions for input data and response
1283 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1284 _This is not a limitation by poolifier but Node.js._
1286 #### Public property replacements
1288 `numWorkers` property is now `numberOfWorkers`
1290 #### Internal (protected) properties and methods renaming
1292 These properties are not intended for end users
1294 - `id` => `nextMessageId`
1296 These methods are not intended for end users
1298 - `_chooseWorker` => `chooseWorker`
1299 - `_newWorker` => `createWorker`
1300 - `_execute` => `internalExecute`
1301 - `_chooseWorker` => `chooseWorker`
1302 - `_checkAlive` => `checkAlive`
1304 - `_runAsync` => `runAsync`
1306 ## [1.1.0] - 2020-05-21
1310 - ThreadWorker support async functions as option
1311 - Various external library patches
1313 ## [1.0.0] - 2020-01-24
1317 - FixedThreadPool implementation
1318 - DynamicThreadPool implementation
1319 - WorkerThread implementation to improve developer experience