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).
12 - Fix possible null exception at task finishing handling.
16 - Optimize Deque implementation to improve tasks queueing performance.
18 ## [3.1.18] - 2024-01-06
22 - Fix dynamic pool with minimum number of workers set to zero: [#1748](https://github.com/poolifier/poolifier/issues/1748).
24 ## [3.1.17] - 2024-01-05
28 - Improve performance by clean up unneeded condition checks on hot code paths.
30 ## [3.1.16] - 2024-01-03
34 - Add missing type to TS type definitions.
36 ## [3.1.15] - 2024-01-02
40 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
42 ## [3.1.15-0] - 2024-01-02
46 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
48 ## [3.1.14] - 2024-01-01
52 - Properly handle dynamic pool with zero minimum size.
54 ## [3.1.13] - 2023-12-30
58 - Reduce branching in several hot code paths.
59 - Use faster object cloning implementation.
61 ## [3.1.12] - 2023-12-27
65 - Fix tasks redistribution triggers at pool destroying.
69 - Switch TypeScript module resolution to Node16.
71 ## [3.1.12-0] - 2023-12-27
75 - Fix tasks redistribution triggers at pool destroying.
77 ## [3.1.11] - 2023-12-24
81 - Avoid worker node cross tasks stealing.
82 - Ensure only half the pool worker nodes can steal tasks.
84 ## [3.1.10] - 2023-12-23
88 - Avoid useless branching on pool type.
90 ## [3.1.9] - 2023-12-22
94 - Readd ThreadPoolOptions and ClusterPoolOptions TS type aliases to PoolOptions.
96 ## [3.1.8] - 2023-12-21
100 - Fix default worker weight computation.
101 - Fix possible null exception at pool destroying.
103 ## [3.1.7] - 2023-12-20
107 - Ensure worker choice strategies implementation wait for worker node readiness: [#1748](https://github.com/poolifier/poolifier/issues/1748).
109 ## [3.1.6] - 2023-12-18
113 - Fix pool destroying with tasks queuing enabled.
115 ## [3.1.5] - 2023-12-18
119 - Add queued tasks end timeout support to worker node termination.
121 ## [3.1.4] - 2023-12-18
125 - Make more robust the fix for possible null exception at handling task execution response.
127 ## [3.1.3] - 2023-12-17
131 - Fix possible null exception at handling task execution response.
133 ## [3.1.2] - 2023-12-17
137 - Wait for queued tasks to end at worker node termination.
139 ## [3.1.1] - 2023-12-16
143 - Fix pool options TS type definition.
145 ## [3.1.0] - 2023-12-16
149 - TypeScript breaking change: merge ThreadPoolOptions and ClusterPoolOptions types into PoolOptions type.
151 ## [3.0.14] - 2023-12-13
155 - Fix possible null exception with worker_threads pools.
157 ## [3.0.13] - 2023-12-12
161 - Ensure worker choice strategy wait for worker nodes readiness.
165 - Remove infinite retries support in worker choice strategy to avoid configuration leading to possible infinite recursion or loop.
167 ## [3.0.12] - 2023-12-12
171 - Add infinite retries support in worker choice strategy.
173 ## [3.0.11] - 2023-12-11
177 - Ensure pool asynchronous resource properly track tasks execution.
179 ## [3.0.10] - 2023-12-08
183 - Add a fastpath when tasks stealing or redistribution is impossible.
185 ## [3.0.9] - 2023-11-26
189 - Remove all pool events listener at pool destroying.
190 - Remove all worker node events listener at worker node destroying.
191 - Fix worker node event emitter listeners handling memory leak at pool options runtime change.
193 ## [3.0.8] - 2023-11-25
197 - Ensure continuous tasks stealing on idle start at worker node idling.
199 ## [3.0.7] - 2023-11-24
203 - Make continuous tasks stealing start at worker node idling.
205 ## [3.0.6] - 2023-11-24
209 - Ensure pool statuses are checked at initialization, `start()` or `destroy()`.
210 - Ensure pool `ready` event can be emitted after several `start()/destroy()` cycles.
212 ## [3.0.5] - 2023-10-27
216 - Ensure pool `ready` event can be emitted only once.
218 ## [3.0.4] - 2023-10-20
222 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
223 - Use builtin retry mechanism in worker choice strategies instead of custom one.
225 ## [3.0.3] - 2023-10-19
229 - Avoid null exception at sending message to worker.
230 - Avoid null exception at checking worker node readiness.
232 ## [3.0.2] - 2023-10-17
236 - 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).
238 ## [3.0.1] - 2023-10-16
242 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
246 - Switch the worker node eventing code to `EventTarget` API.
248 ## [3.0.0] - 2023-10-08
252 - Remove Node.js 16.x.x (EOL) support.
254 ## [2.7.5] - 2023-10-03
258 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
260 ## [2.7.4] - 2023-09-25
264 - Fix source maps (bundler issue).
266 ## [2.7.3] - 2023-09-24
270 - Convert pool event emitter to event emitter async resource.
272 ## [2.7.2] - 2023-09-23
276 - Add source maps to npm package to ease debugging.
280 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
282 ## [2.7.1] - 2023-09-20
286 - Ensure worker message listener used one time are removed after usage.
288 ## [2.7.0] - 2023-09-19
292 - Fix task stealing related tasks queue options handling at runtime.
296 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
300 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
301 - Stricter worker constructor arguments validation.
303 ## [2.6.45] - 2023-09-17
307 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
311 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
312 - Add `start()` method to pool API to start the minimum number of workers.
313 - 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.
314 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
316 ## [2.6.44] - 2023-09-08
320 - Use a dedicated PAT to publish on GitHub packages registry.
324 - Publish on GitHub packages registry on release.
328 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
330 ## [2.6.43] - 2023-09-08
334 - Publish on GitHub packages registry on release.
338 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
340 ## [2.6.42] - 2023-09-06
344 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
346 ## [2.6.41] - 2023-09-03
350 - Optimize worker choice strategies implementation.
352 ## [2.6.40] - 2023-09-01
356 - Do not pre-choose in WRR worker choice strategy to avoid bias.
357 - Avoid array out of bound in worker choice strategies after worker node removal.
359 ## [2.6.39] - 2023-08-30
363 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
365 ## [2.6.38] - 2023-08-30
369 - Bundle typescript types declaration into one file.
373 - Improve interleaved weighted round robin worker choice strategy implementation.
375 ## [2.6.37] - 2023-08-28
379 - Ensure unused worker usage statistics are deleted at runtime.
383 - Rename worker choice strategy options `choiceRetries` to `retries`.
384 - Avoid unnecessary branching in worker choice strategies.
386 ## [2.6.36] - 2023-08-27
390 - Fix pool `execute()` arguments check.
394 - Make continuous tasks stealing algorithm less aggressive.
395 - Fine tune tasks stealing algorithm under back pressure.
397 ## [2.6.35] - 2023-08-25
401 - Don't account worker usage statistics for tasks that have failed.
402 - Fix pool information runtime and wait time median computation.
406 - Update simple moving average implementation to use a circular buffer.
407 - Update simple moving median implementation to use a circular buffer.
408 - Account for stolen tasks in worker usage statistics and pool information.
412 - Continuous tasks stealing algorithm.
414 ## [2.6.34] - 2023-08-24
418 - Avoid cascading tasks stealing under back pressure.
422 - Add fastpath to queued tasks rescheduling.
424 ## [2.6.33] - 2023-08-24
428 - Fix queued tasks rescheduling.
432 - Rename tasks queue options `queueMaxSize` to `size`.
436 - Task stealing scheduling algorithm if tasks queueing is enabled.
438 ## [2.6.32] - 2023-08-23
442 - Ensure no task can be executed when the pool is destroyed.
446 - Add `queueMaxSize` option to tasks queue options.
447 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
448 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
450 ## [2.6.31] - 2023-08-20
454 - Fix worker choice strategy retries mechanism in some edge cases.
458 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
459 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
461 ## [2.6.30] - 2023-08-19
465 - Ensure pool event `backPressure` is emitted.
466 - Ensure pool event `full` is emitted only once.
467 - Ensure worker node cannot be instantiated without proper arguments.
469 ## [2.6.29] - 2023-08-18
473 - Fix race condition between readiness and task functions worker message handling at startup.
474 - Fix duplicate task function worker usage statistics computation per task function.
475 - Update task function worker usage statistics if and only if there's at least two different task functions.
476 - Fix race condition at task function worker usage executing task computation leading to negative value.
480 - 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).
481 - Use back pressure detection in worker choice strategies.
482 - Add worker choice strategies retries mechanism if no worker is eligible.
484 ## [2.6.28] - 2023-08-16
488 - Ensure pool workers are properly initialized.
492 - HTTP server pool examples: express-cluster, express-hybrid.
496 - Remove now useless branching in worker hot code path.
498 ## [2.6.27] - 2023-08-15
502 - Add `KillHandler` type definition to exported types.
506 - Add `destroy` event to pool API.
508 ## [2.6.26] - 2023-08-15
512 - Add kill handler to worker options allowing to execute custom code when worker is killed.
513 - Add `listTaskFunctions()` method to pool API.
514 - SMTP client pool example: nodemailer.
516 ## [2.6.25] - 2023-08-13
520 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
521 - WebSocket server pool examples: ws-cluster, ws-hybrid.
523 ## [2.6.24] - 2023-08-12
527 - Add array of transferable objects to the `execute()` method arguments.
528 - WebSocket server pool examples: ws-worker_threads.
530 ## [2.6.23] - 2023-08-11
534 - 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.
538 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
539 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
541 ## [2.6.22] - 2023-08-10
545 - Add missing `types` field to package.json `exports`.
549 - Structure markdown documentation (PR #811).
551 ## [2.6.21] - 2023-08-03
555 - Improve code documentation.
556 - Code refactoring and cleanup for better maintainability and readability.
558 ## [2.6.20] - 2023-07-21
562 - Fix queued tasks redistribution on error task execution starvation.
563 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
567 - Drastically reduce lookups by worker in the worker nodes.
569 ## [2.6.19] - 2023-07-20
573 - Dedicated internal communication channel for worker_threads pools.
575 ## [2.6.18] - 2023-07-19
579 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
581 ## [2.6.17] - 2023-07-16
585 - Add `listTaskFunctions()` method to worker API.
587 ## [2.6.16] - 2023-07-12
591 - Fix pool startup detection.
592 - Fix worker task functions handling.
594 ## [2.6.15] - 2023-07-11
598 - Take into account worker node readiness in worker choice strategies.
600 ## [2.6.14] - 2023-07-10
604 - Fix task function statistics tracking.
606 ## [2.6.13] - 2023-07-10
610 - Add per task function statistics tracking.
611 - Add public methods to manipulate the worker task functions at runtime.
613 ## [2.6.12] - 2023-07-09
617 - Workaround import issue with `node:os` module in node 16.x.x.
619 ## [2.6.11] - 2023-07-09
623 - Fix pool readiness semantic.
625 ## [2.6.10] - 2023-07-08
629 - Ensure workers are not recreated on error at pool startup.
633 - Add `ready` and `strategy` fields to pool information.
634 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
635 - Add dynamic pool sizing checks.
637 ## [2.6.9] - 2023-07-07
641 - Recreate the right worker type on uncaught exception.
645 - Add minimum and maximum to internal measurement statistics.
646 - Add `runTime` and `waitTime` to pool information.
647 - Check worker inactive time only on dynamic worker.
649 ## [2.6.8] - 2023-07-03
653 - Brown paper bag release to fix version handling in pool information.
655 ## [2.6.7] - 2023-07-03
659 - Ensure worker queued tasks at error are reassigned to other pool workers.
663 - Add pool `utilization` ratio to pool information.
664 - Add `version` to pool information.
665 - Add worker information to worker nodes.
667 ## [2.6.6] - 2023-07-01
671 - Add safe helper `availableParallelism()` to help sizing the pool.
675 - Ensure message handler is only registered in worker.
677 ## [2.6.5] - 2023-06-27
681 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
685 - Artificial version bump to 2.6.5 to workaround publication issue.
686 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
687 - Ensure pool event is emitted before task error promise rejection.
688 - Fix queued tasks count computation.
692 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
694 ## [2.6.4] - 2023-06-27
698 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
702 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
703 - Ensure pool event is emitted before task error promise rejection.
704 - Fix queued tasks count computation.
708 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
710 ## [2.6.3] - 2023-06-19
714 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
715 - Update strategies internals after statistics computation.
719 - Optimize O(1) queue implementation.
721 ## [2.6.2] - 2023-06-12
725 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
727 ## [2.6.1] - 2023-06-10
731 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
735 - Fix average statistics computation: ensure failed tasks are not accounted.
737 ## [2.6.0] - 2023-06-09
741 - Add `LEAST_ELU` worker choice strategy (experimental).
742 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
746 - Refactor pool worker node usage internals.
747 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
748 - Breaking change: pool information `info` property object fields have been renamed.
752 - Fix wait time accounting.
753 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
754 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
756 ## [2.5.4] - 2023-06-07
760 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
764 - Compute statistics at the worker level only if needed.
765 - Add `worker_threads` options to thread pool options.
769 - Make the `LEAST_BUSY` strategy only relies on task runtime.
771 ## [2.5.3] - 2023-06-04
775 - Refine pool information content.
776 - Limit pool internals public exposure.
778 ## [2.5.2] - 2023-06-02
782 - Add `taskError` pool event for task execution error.
783 - Add pool information `info` property to pool.
784 - Emit pool information on `busy` and `full` pool events.
786 ## [2.5.1] - 2023-06-01
790 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
791 - Add `error` pool event for uncaught worker error.
793 ## [2.5.0] - 2023-05-31
797 - Switch pool event emitter to `EventEmitterAsyncResource`.
798 - Add tasks wait time accounting in per worker tasks usage.
799 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
803 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
805 ## [2.4.14] - 2023-05-09
809 - Ensure no undefined task runtime can land in the tasks history.
810 - Fix median computation implementation once again.
814 - Unit tests for median and queue implementations.
816 ## [2.4.13] - 2023-05-08
820 - Fix worker choice strategy options validation.
821 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
823 ## [2.4.12] - 2023-05-06
827 - Support multiple task functions per worker.
828 - Add custom worker weights support to worker choice strategies options.
832 - Use O(1) queue implementation for tasks queueing.
836 - Fix median computation implementation.
837 - Fix fair share worker choice strategy internals update.
839 ## [2.4.11] - 2023-04-23
843 - Optimize free worker finding in worker choice strategies.
845 ## [2.4.10] - 2023-04-15
849 - Fix typescript type definition for task function: ensure the input data is optional.
850 - Fix typescript type definition for pool execute(): ensure the input data is optional.
852 ## [2.4.9] - 2023-04-15
856 - Add tasks queue enablement runtime setter to pool.
857 - Add tasks queue options runtime setter to pool.
858 - Add worker choice strategy options runtime setter to pool.
862 - Remove the tasks queuing experimental status.
866 - Fix task function type definition and validation.
867 - Fix worker choice strategy options handling.
869 ## [2.4.8] - 2023-04-12
873 - Fix message between main worker and worker type definition for tasks.
874 - Fix code documentation.
876 ## [2.4.7] - 2023-04-11
880 - Add worker tasks queue options to pool options.
884 - Fix missing documentation.
886 ## [2.4.6] - 2023-04-10
890 - Ensure one task at a time is executed per worker with tasks queueing enabled.
891 - Properly count worker executing tasks with tasks queueing enabled.
893 ## [2.4.5] - 2023-04-09
897 - Use monotonic high resolution timer for worker tasks runtime.
898 - Add worker tasks median runtime to statistics.
899 - Add worker tasks queue (experimental).
901 ## [2.4.4] - 2023-04-07
905 - Add `PoolEvents` enumeration and `PoolEvent` type.
909 - Destroy worker only on alive check.
911 ## [2.4.3] - 2023-04-07
915 - Fix typedoc generation with inheritance.
917 ## [2.4.2] - 2023-04-06
921 - Add `full` event to dynamic pool.
922 - Keep worker choice strategy in memory for conditional reuse.
926 - Fix possible negative worker key at worker removal in worker choice strategies.
928 ## [2.4.1] - 2023-04-05
932 - Optimize worker choice strategy for dynamic pool.
936 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
938 ## [2.4.0] - 2023-04-04
942 - Add `LESS_BUSY` worker choice strategy.
946 - Optimize worker storage in pool.
947 - Optimize worker alive status check.
948 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
949 - Optimize `LESS_USED` worker choice strategy.
950 - Update benchmark versus external threads pools.
951 - Optimize tasks usage statistics requirements for worker choice strategy.
955 - Ensure trimmable characters are checked at pool initialization.
956 - Fix message id integer overflow.
957 - Fix pool worker removal in worker choice strategy internals.
958 - Fix package publication with pnpm.
960 ## [2.4.0-3] - 2023-04-04
964 - Add `LESS_BUSY` worker choice strategy.
968 - Optimize worker storage in pool.
969 - Optimize worker alive status check.
970 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
971 - Optimize `LESS_USED` worker choice strategy.
972 - Update benchmark versus external threads pools.
976 - Ensure trimmable characters are checked at pool initialization.
977 - Fix message id integer overflow.
978 - Fix pool worker removal in worker choice strategy internals.
979 - Fix package publication with pnpm.
981 ## [2.4.0-2] - 2023-04-03
985 - Add `LESS_BUSY` worker choice strategy.
989 - Optimize worker storage in pool.
990 - Optimize worker alive status check.
991 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
992 - Optimize `LESS_USED` worker choice strategy.
996 - Ensure trimmable characters are checked at pool initialization.
997 - Fix message id integer overflow.
998 - Fix pool worker removal in worker choice strategy internals.
999 - Fix package publication with pnpm.
1001 ## [2.4.0-1] - 2023-04-03
1005 - Add `LESS_BUSY` worker choice strategy.
1009 - Optimize worker storage in pool.
1010 - Optimize worker alive status check.
1011 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1012 - Optimize `LESS_USED` worker choice strategy.
1016 - Ensure trimmable characters are checked at pool initialization.
1017 - Fix message id integer overflow.
1018 - Fix pool worker removal in worker choice strategy internals.
1020 ## [2.4.0-0] - 2023-04-03
1024 - Add `LESS_BUSY` worker choice strategy.
1028 - Optimize worker storage in pool.
1029 - Optimize worker alive status check.
1030 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1031 - Optimize `LESS_USED` worker choice strategy.
1035 - Ensure trimmable characters are checked at pool initialization.
1036 - Fix message id integer overflow.
1037 - Fix pool worker removal in worker choice strategy internals.
1039 ## [2.3.10] - 2023-03-18
1043 - Fix package.json `exports` syntax for ESM and CommonJS.
1047 - Permit SemVer pre-release publication.
1049 ## [2.3.10-2] - 2023-03-18
1053 - Fix package.json `exports` syntax for ESM and CommonJS.
1055 ## [2.3.10-1] - 2023-03-18
1059 - Permit SemVer pre-release publication.
1061 ## [2.3.10-0] - 2023-03-18
1065 - Fix package.json `exports` syntax for ESM and CommonJS.
1067 ## [2.3.9] - 2023-03-18
1071 - Introduce ESM module support along with CommonJS one.
1075 - Fix brown paper bag bug referencing the same object literal.
1077 ## [2.3.8] - 2023-03-18
1081 - Switch internal benchmarking code to benny.
1082 - Switch to TypeScript 5.x.x.
1083 - Switch rollup bundler plugins to core ones.
1084 - Switch to TSDoc syntax.
1085 - Enforce conventional commits.
1089 - Fix random integer generator.
1090 - Fix worker choice strategy pool type identification at initialization.
1092 ## [2.3.7] - 2022-10-23
1096 - Switch to open collective FOSS project funding platform.
1097 - Switch to ts-standard linter configuration on TypeScript code.
1101 - Fixed missing async on pool execute method.
1102 - Fixed typing in TypeScript example.
1103 - Fixed types in unit tests.
1105 ## [2.3.6] - 2022-10-22
1109 - Cleanup pool attributes and methods.
1110 - Refine error types thrown.
1114 - Fix continuous integration build on windows.
1115 - Fix code coverage reporting by using c8 instead of nyc.
1117 ## [2.3.5] - 2022-10-21
1121 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
1122 - Optimize tasks usage lookup implementation.
1126 - Fix missed pool event emitter type export.
1127 - Fix typedoc documentation generation.
1129 ## [2.3.4] - 2022-10-17
1133 - Fully automate release process with release-it.
1137 - Optimize fair share task scheduling algorithm implementation.
1138 - Update benchmark versus external pools results with latest version.
1140 ## [2.3.3] - 2022-10-15
1144 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
1146 ## [2.3.2] - 2022-10-14
1150 - Optimize fair share worker selection strategy implementation.
1154 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
1156 ## [2.3.1] - 2022-10-13
1160 - Pool worker choice strategies:
1161 - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
1162 - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
1164 ## [2.2.2] - 2022-10-09
1168 - Fixed `README.md` file.
1170 ## [2.2.1] - 2022-10-08
1174 - Dynamic worker choice strategy change at runtime.
1176 ## [2.2.0] - 2022-01-05
1178 ### Breaking Changes
1180 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
1182 ## [2.1.0] - 2021-08-29
1186 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
1188 ### Breaking Changes
1190 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
1191 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
1192 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
1193 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
1195 ## [2.0.2] - 2021-05-12
1199 - Fix `busy` event emission on fixed pool type
1201 ## [2.0.1] - 2021-03-16
1205 - Check if pool options are properly set.
1206 - `busy` event is emitted on all pool types.
1208 ## [2.0.0] - 2021-03-01
1212 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1214 ### Breaking Changes
1216 - `FullPool` event is now renamed to `busy`.
1217 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1218 _Find more details on our JSDoc._
1220 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1222 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1224 ### Pool options types declaration merge
1226 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1228 #### New `export` strategy
1232 const DynamicThreadPool = require('poolifier/lib/dynamic')
1234 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1237 But you should always prefer just using
1240 const { DynamicThreadPool } = require('poolifier')
1243 #### New type definitions for input data and response
1245 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1246 _This is not a limitation by poolifier but Node.js._
1248 #### Public property replacements
1250 `numWorkers` property is now `numberOfWorkers`
1252 #### Internal (protected) properties and methods renaming
1254 These properties are not intended for end users
1256 - `id` => `nextMessageId`
1258 These methods are not intended for end users
1260 - `_chooseWorker` => `chooseWorker`
1261 - `_newWorker` => `createWorker`
1262 - `_execute` => `internalExecute`
1263 - `_chooseWorker` => `chooseWorker`
1264 - `_checkAlive` => `checkAlive`
1266 - `_runAsync` => `runAsync`
1268 ## [1.1.0] - 2020-05-21
1272 - ThreadWorker support async functions as option
1273 - Various external library patches
1275 ## [1.0.0] - 2020-01-24
1279 - FixedThreadPool implementation
1280 - DynamicThreadPool implementation
1281 - WorkerThread implementation to improve developer experience