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 null exception regression: [#1496](https://github.com/poolifier/poolifier/issues/1496).
14 ## [3.1.20] - 2024-02-11
18 - Ensure `worker_threads` workers are unreferenced at termination.
20 ## [3.1.19] - 2024-01-16
24 - Fix possible null exception at task finishing handling.
28 - Optimize Deque implementation to improve tasks queueing performance.
30 ## [3.1.18] - 2024-01-06
34 - Fix dynamic pool with minimum number of workers set to zero: [#1748](https://github.com/poolifier/poolifier/issues/1748).
36 ## [3.1.17] - 2024-01-05
40 - Improve performance by clean up unneeded condition checks on hot code paths.
42 ## [3.1.16] - 2024-01-03
46 - Add missing type to TS type definitions.
48 ## [3.1.15] - 2024-01-02
52 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
54 ## [3.1.15-0] - 2024-01-02
58 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
60 ## [3.1.14] - 2024-01-01
64 - Properly handle dynamic pool with zero minimum size.
66 ## [3.1.13] - 2023-12-30
70 - Reduce branching in several hot code paths.
71 - Use faster object cloning implementation.
73 ## [3.1.12] - 2023-12-27
77 - Fix tasks redistribution triggers at pool destroying.
81 - Switch TypeScript module resolution to Node16.
83 ## [3.1.12-0] - 2023-12-27
87 - Fix tasks redistribution triggers at pool destroying.
89 ## [3.1.11] - 2023-12-24
93 - Avoid worker node cross tasks stealing.
94 - Ensure only half the pool worker nodes can steal tasks.
96 ## [3.1.10] - 2023-12-23
100 - Avoid useless branching on pool type.
102 ## [3.1.9] - 2023-12-22
106 - Readd ThreadPoolOptions and ClusterPoolOptions TS type aliases to PoolOptions.
108 ## [3.1.8] - 2023-12-21
112 - Fix default worker weight computation.
113 - Fix possible null exception at pool destroying.
115 ## [3.1.7] - 2023-12-20
119 - Ensure worker choice strategies implementation wait for worker node readiness: [#1748](https://github.com/poolifier/poolifier/issues/1748).
121 ## [3.1.6] - 2023-12-18
125 - Fix pool destroying with tasks queuing enabled.
127 ## [3.1.5] - 2023-12-18
131 - Add queued tasks end timeout support to worker node termination.
133 ## [3.1.4] - 2023-12-18
137 - Make more robust the fix for possible null exception at handling task execution response.
139 ## [3.1.3] - 2023-12-17
143 - Fix possible null exception at handling task execution response.
145 ## [3.1.2] - 2023-12-17
149 - Wait for queued tasks to end at worker node termination.
151 ## [3.1.1] - 2023-12-16
155 - Fix pool options TS type definition.
157 ## [3.1.0] - 2023-12-16
161 - TypeScript breaking change: merge ThreadPoolOptions and ClusterPoolOptions types into PoolOptions type.
163 ## [3.0.14] - 2023-12-13
167 - Fix possible null exception with worker_threads pools.
169 ## [3.0.13] - 2023-12-12
173 - Ensure worker choice strategy wait for worker nodes readiness.
177 - Remove infinite retries support in worker choice strategy to avoid configuration leading to possible infinite recursion or loop.
179 ## [3.0.12] - 2023-12-12
183 - Add infinite retries support in worker choice strategy.
185 ## [3.0.11] - 2023-12-11
189 - Ensure pool asynchronous resource properly track tasks execution.
191 ## [3.0.10] - 2023-12-08
195 - Add a fastpath when tasks stealing or redistribution is impossible.
197 ## [3.0.9] - 2023-11-26
201 - Remove all pool events listener at pool destroying.
202 - Remove all worker node events listener at worker node destroying.
203 - Fix worker node event emitter listeners handling memory leak at pool options runtime change.
205 ## [3.0.8] - 2023-11-25
209 - Ensure continuous tasks stealing on idle start at worker node idling.
211 ## [3.0.7] - 2023-11-24
215 - Make continuous tasks stealing start at worker node idling.
217 ## [3.0.6] - 2023-11-24
221 - Ensure pool statuses are checked at initialization, `start()` or `destroy()`.
222 - Ensure pool `ready` event can be emitted after several `start()/destroy()` cycles.
224 ## [3.0.5] - 2023-10-27
228 - Ensure pool `ready` event can be emitted only once.
230 ## [3.0.4] - 2023-10-20
234 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
235 - Use builtin retry mechanism in worker choice strategies instead of custom one.
237 ## [3.0.3] - 2023-10-19
241 - Avoid null exception at sending message to worker.
242 - Avoid null exception at checking worker node readiness.
244 ## [3.0.2] - 2023-10-17
248 - 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).
250 ## [3.0.1] - 2023-10-16
254 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
258 - Switch the worker node eventing code to `EventTarget` API.
260 ## [3.0.0] - 2023-10-08
264 - Remove Node.js 16.x.x (EOL) support.
266 ## [2.7.5] - 2023-10-03
270 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
272 ## [2.7.4] - 2023-09-25
276 - Fix source maps (bundler issue).
278 ## [2.7.3] - 2023-09-24
282 - Convert pool event emitter to event emitter async resource.
284 ## [2.7.2] - 2023-09-23
288 - Add source maps to npm package to ease debugging.
292 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
294 ## [2.7.1] - 2023-09-20
298 - Ensure worker message listener used one time are removed after usage.
300 ## [2.7.0] - 2023-09-19
304 - Fix task stealing related tasks queue options handling at runtime.
308 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
312 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
313 - Stricter worker constructor arguments validation.
315 ## [2.6.45] - 2023-09-17
319 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
323 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
324 - Add `start()` method to pool API to start the minimum number of workers.
325 - 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.
326 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
328 ## [2.6.44] - 2023-09-08
332 - Use a dedicated PAT to publish on GitHub packages registry.
336 - Publish on GitHub packages registry on release.
340 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
342 ## [2.6.43] - 2023-09-08
346 - Publish on GitHub packages registry on release.
350 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
352 ## [2.6.42] - 2023-09-06
356 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
358 ## [2.6.41] - 2023-09-03
362 - Optimize worker choice strategies implementation.
364 ## [2.6.40] - 2023-09-01
368 - Do not pre-choose in WRR worker choice strategy to avoid bias.
369 - Avoid array out of bound in worker choice strategies after worker node removal.
371 ## [2.6.39] - 2023-08-30
375 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
377 ## [2.6.38] - 2023-08-30
381 - Bundle typescript types declaration into one file.
385 - Improve interleaved weighted round robin worker choice strategy implementation.
387 ## [2.6.37] - 2023-08-28
391 - Ensure unused worker usage statistics are deleted at runtime.
395 - Rename worker choice strategy options `choiceRetries` to `retries`.
396 - Avoid unnecessary branching in worker choice strategies.
398 ## [2.6.36] - 2023-08-27
402 - Fix pool `execute()` arguments check.
406 - Make continuous tasks stealing algorithm less aggressive.
407 - Fine tune tasks stealing algorithm under back pressure.
409 ## [2.6.35] - 2023-08-25
413 - Don't account worker usage statistics for tasks that have failed.
414 - Fix pool information runtime and wait time median computation.
418 - Update simple moving average implementation to use a circular buffer.
419 - Update simple moving median implementation to use a circular buffer.
420 - Account for stolen tasks in worker usage statistics and pool information.
424 - Continuous tasks stealing algorithm.
426 ## [2.6.34] - 2023-08-24
430 - Avoid cascading tasks stealing under back pressure.
434 - Add fastpath to queued tasks rescheduling.
436 ## [2.6.33] - 2023-08-24
440 - Fix queued tasks rescheduling.
444 - Rename tasks queue options `queueMaxSize` to `size`.
448 - Task stealing scheduling algorithm if tasks queueing is enabled.
450 ## [2.6.32] - 2023-08-23
454 - Ensure no task can be executed when the pool is destroyed.
458 - Add `queueMaxSize` option to tasks queue options.
459 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
460 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
462 ## [2.6.31] - 2023-08-20
466 - Fix worker choice strategy retries mechanism in some edge cases.
470 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
471 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
473 ## [2.6.30] - 2023-08-19
477 - Ensure pool event `backPressure` is emitted.
478 - Ensure pool event `full` is emitted only once.
479 - Ensure worker node cannot be instantiated without proper arguments.
481 ## [2.6.29] - 2023-08-18
485 - Fix race condition between readiness and task functions worker message handling at startup.
486 - Fix duplicate task function worker usage statistics computation per task function.
487 - Update task function worker usage statistics if and only if there's at least two different task functions.
488 - Fix race condition at task function worker usage executing task computation leading to negative value.
492 - 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).
493 - Use back pressure detection in worker choice strategies.
494 - Add worker choice strategies retries mechanism if no worker is eligible.
496 ## [2.6.28] - 2023-08-16
500 - Ensure pool workers are properly initialized.
504 - HTTP server pool examples: express-cluster, express-hybrid.
508 - Remove now useless branching in worker hot code path.
510 ## [2.6.27] - 2023-08-15
514 - Add `KillHandler` type definition to exported types.
518 - Add `destroy` event to pool API.
520 ## [2.6.26] - 2023-08-15
524 - Add kill handler to worker options allowing to execute custom code when worker is killed.
525 - Add `listTaskFunctions()` method to pool API.
526 - SMTP client pool example: nodemailer.
528 ## [2.6.25] - 2023-08-13
532 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
533 - WebSocket server pool examples: ws-cluster, ws-hybrid.
535 ## [2.6.24] - 2023-08-12
539 - Add array of transferable objects to the `execute()` method arguments.
540 - WebSocket server pool examples: ws-worker_threads.
542 ## [2.6.23] - 2023-08-11
546 - 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.
550 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
551 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
553 ## [2.6.22] - 2023-08-10
557 - Add missing `types` field to package.json `exports`.
561 - Structure markdown documentation (PR #811).
563 ## [2.6.21] - 2023-08-03
567 - Improve code documentation.
568 - Code refactoring and cleanup for better maintainability and readability.
570 ## [2.6.20] - 2023-07-21
574 - Fix queued tasks redistribution on error task execution starvation.
575 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
579 - Drastically reduce lookups by worker in the worker nodes.
581 ## [2.6.19] - 2023-07-20
585 - Dedicated internal communication channel for worker_threads pools.
587 ## [2.6.18] - 2023-07-19
591 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
593 ## [2.6.17] - 2023-07-16
597 - Add `listTaskFunctions()` method to worker API.
599 ## [2.6.16] - 2023-07-12
603 - Fix pool startup detection.
604 - Fix worker task functions handling.
606 ## [2.6.15] - 2023-07-11
610 - Take into account worker node readiness in worker choice strategies.
612 ## [2.6.14] - 2023-07-10
616 - Fix task function statistics tracking.
618 ## [2.6.13] - 2023-07-10
622 - Add per task function statistics tracking.
623 - Add public methods to manipulate the worker task functions at runtime.
625 ## [2.6.12] - 2023-07-09
629 - Workaround import issue with `node:os` module in node 16.x.x.
631 ## [2.6.11] - 2023-07-09
635 - Fix pool readiness semantic.
637 ## [2.6.10] - 2023-07-08
641 - Ensure workers are not recreated on error at pool startup.
645 - Add `ready` and `strategy` fields to pool information.
646 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
647 - Add dynamic pool sizing checks.
649 ## [2.6.9] - 2023-07-07
653 - Recreate the right worker type on uncaught exception.
657 - Add minimum and maximum to internal measurement statistics.
658 - Add `runTime` and `waitTime` to pool information.
659 - Check worker inactive time only on dynamic worker.
661 ## [2.6.8] - 2023-07-03
665 - Brown paper bag release to fix version handling in pool information.
667 ## [2.6.7] - 2023-07-03
671 - Ensure worker queued tasks at error are reassigned to other pool workers.
675 - Add pool `utilization` ratio to pool information.
676 - Add `version` to pool information.
677 - Add worker information to worker nodes.
679 ## [2.6.6] - 2023-07-01
683 - Add safe helper `availableParallelism()` to help sizing the pool.
687 - Ensure message handler is only registered in worker.
689 ## [2.6.5] - 2023-06-27
693 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
697 - Artificial version bump to 2.6.5 to workaround publication issue.
698 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
699 - Ensure pool event is emitted before task error promise rejection.
700 - Fix queued tasks count computation.
704 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
706 ## [2.6.4] - 2023-06-27
710 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
714 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
715 - Ensure pool event is emitted before task error promise rejection.
716 - Fix queued tasks count computation.
720 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
722 ## [2.6.3] - 2023-06-19
726 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
727 - Update strategies internals after statistics computation.
731 - Optimize O(1) queue implementation.
733 ## [2.6.2] - 2023-06-12
737 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
739 ## [2.6.1] - 2023-06-10
743 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
747 - Fix average statistics computation: ensure failed tasks are not accounted.
749 ## [2.6.0] - 2023-06-09
753 - Add `LEAST_ELU` worker choice strategy (experimental).
754 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
758 - Refactor pool worker node usage internals.
759 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
760 - Breaking change: pool information `info` property object fields have been renamed.
764 - Fix wait time accounting.
765 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
766 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
768 ## [2.5.4] - 2023-06-07
772 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
776 - Compute statistics at the worker level only if needed.
777 - Add `worker_threads` options to thread pool options.
781 - Make the `LEAST_BUSY` strategy only relies on task runtime.
783 ## [2.5.3] - 2023-06-04
787 - Refine pool information content.
788 - Limit pool internals public exposure.
790 ## [2.5.2] - 2023-06-02
794 - Add `taskError` pool event for task execution error.
795 - Add pool information `info` property to pool.
796 - Emit pool information on `busy` and `full` pool events.
798 ## [2.5.1] - 2023-06-01
802 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
803 - Add `error` pool event for uncaught worker error.
805 ## [2.5.0] - 2023-05-31
809 - Switch pool event emitter to `EventEmitterAsyncResource`.
810 - Add tasks wait time accounting in per worker tasks usage.
811 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
815 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
817 ## [2.4.14] - 2023-05-09
821 - Ensure no undefined task runtime can land in the tasks history.
822 - Fix median computation implementation once again.
826 - Unit tests for median and queue implementations.
828 ## [2.4.13] - 2023-05-08
832 - Fix worker choice strategy options validation.
833 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
835 ## [2.4.12] - 2023-05-06
839 - Support multiple task functions per worker.
840 - Add custom worker weights support to worker choice strategies options.
844 - Use O(1) queue implementation for tasks queueing.
848 - Fix median computation implementation.
849 - Fix fair share worker choice strategy internals update.
851 ## [2.4.11] - 2023-04-23
855 - Optimize free worker finding in worker choice strategies.
857 ## [2.4.10] - 2023-04-15
861 - Fix typescript type definition for task function: ensure the input data is optional.
862 - Fix typescript type definition for pool execute(): ensure the input data is optional.
864 ## [2.4.9] - 2023-04-15
868 - Add tasks queue enablement runtime setter to pool.
869 - Add tasks queue options runtime setter to pool.
870 - Add worker choice strategy options runtime setter to pool.
874 - Remove the tasks queuing experimental status.
878 - Fix task function type definition and validation.
879 - Fix worker choice strategy options handling.
881 ## [2.4.8] - 2023-04-12
885 - Fix message between main worker and worker type definition for tasks.
886 - Fix code documentation.
888 ## [2.4.7] - 2023-04-11
892 - Add worker tasks queue options to pool options.
896 - Fix missing documentation.
898 ## [2.4.6] - 2023-04-10
902 - Ensure one task at a time is executed per worker with tasks queueing enabled.
903 - Properly count worker executing tasks with tasks queueing enabled.
905 ## [2.4.5] - 2023-04-09
909 - Use monotonic high resolution timer for worker tasks runtime.
910 - Add worker tasks median runtime to statistics.
911 - Add worker tasks queue (experimental).
913 ## [2.4.4] - 2023-04-07
917 - Add `PoolEvents` enumeration and `PoolEvent` type.
921 - Destroy worker only on alive check.
923 ## [2.4.3] - 2023-04-07
927 - Fix typedoc generation with inheritance.
929 ## [2.4.2] - 2023-04-06
933 - Add `full` event to dynamic pool.
934 - Keep worker choice strategy in memory for conditional reuse.
938 - Fix possible negative worker key at worker removal in worker choice strategies.
940 ## [2.4.1] - 2023-04-05
944 - Optimize worker choice strategy for dynamic pool.
948 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
950 ## [2.4.0] - 2023-04-04
954 - Add `LESS_BUSY` worker choice strategy.
958 - Optimize worker storage in pool.
959 - Optimize worker alive status check.
960 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
961 - Optimize `LESS_USED` worker choice strategy.
962 - Update benchmark versus external threads pools.
963 - Optimize tasks usage statistics requirements for worker choice strategy.
967 - Ensure trimmable characters are checked at pool initialization.
968 - Fix message id integer overflow.
969 - Fix pool worker removal in worker choice strategy internals.
970 - Fix package publication with pnpm.
972 ## [2.4.0-3] - 2023-04-04
976 - Add `LESS_BUSY` worker choice strategy.
980 - Optimize worker storage in pool.
981 - Optimize worker alive status check.
982 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
983 - Optimize `LESS_USED` worker choice strategy.
984 - Update benchmark versus external threads pools.
988 - Ensure trimmable characters are checked at pool initialization.
989 - Fix message id integer overflow.
990 - Fix pool worker removal in worker choice strategy internals.
991 - Fix package publication with pnpm.
993 ## [2.4.0-2] - 2023-04-03
997 - Add `LESS_BUSY` worker choice strategy.
1001 - Optimize worker storage in pool.
1002 - Optimize worker alive status check.
1003 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1004 - Optimize `LESS_USED` worker choice strategy.
1008 - Ensure trimmable characters are checked at pool initialization.
1009 - Fix message id integer overflow.
1010 - Fix pool worker removal in worker choice strategy internals.
1011 - Fix package publication with pnpm.
1013 ## [2.4.0-1] - 2023-04-03
1017 - Add `LESS_BUSY` worker choice strategy.
1021 - Optimize worker storage in pool.
1022 - Optimize worker alive status check.
1023 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1024 - Optimize `LESS_USED` worker choice strategy.
1028 - Ensure trimmable characters are checked at pool initialization.
1029 - Fix message id integer overflow.
1030 - Fix pool worker removal in worker choice strategy internals.
1032 ## [2.4.0-0] - 2023-04-03
1036 - Add `LESS_BUSY` worker choice strategy.
1040 - Optimize worker storage in pool.
1041 - Optimize worker alive status check.
1042 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1043 - Optimize `LESS_USED` worker choice strategy.
1047 - Ensure trimmable characters are checked at pool initialization.
1048 - Fix message id integer overflow.
1049 - Fix pool worker removal in worker choice strategy internals.
1051 ## [2.3.10] - 2023-03-18
1055 - Fix package.json `exports` syntax for ESM and CommonJS.
1059 - Permit SemVer pre-release publication.
1061 ## [2.3.10-2] - 2023-03-18
1065 - Fix package.json `exports` syntax for ESM and CommonJS.
1067 ## [2.3.10-1] - 2023-03-18
1071 - Permit SemVer pre-release publication.
1073 ## [2.3.10-0] - 2023-03-18
1077 - Fix package.json `exports` syntax for ESM and CommonJS.
1079 ## [2.3.9] - 2023-03-18
1083 - Introduce ESM module support along with CommonJS one.
1087 - Fix brown paper bag bug referencing the same object literal.
1089 ## [2.3.8] - 2023-03-18
1093 - Switch internal benchmarking code to benny.
1094 - Switch to TypeScript 5.x.x.
1095 - Switch rollup bundler plugins to core ones.
1096 - Switch to TSDoc syntax.
1097 - Enforce conventional commits.
1101 - Fix random integer generator.
1102 - Fix worker choice strategy pool type identification at initialization.
1104 ## [2.3.7] - 2022-10-23
1108 - Switch to open collective FOSS project funding platform.
1109 - Switch to ts-standard linter configuration on TypeScript code.
1113 - Fixed missing async on pool execute method.
1114 - Fixed typing in TypeScript example.
1115 - Fixed types in unit tests.
1117 ## [2.3.6] - 2022-10-22
1121 - Cleanup pool attributes and methods.
1122 - Refine error types thrown.
1126 - Fix continuous integration build on windows.
1127 - Fix code coverage reporting by using c8 instead of nyc.
1129 ## [2.3.5] - 2022-10-21
1133 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
1134 - Optimize tasks usage lookup implementation.
1138 - Fix missed pool event emitter type export.
1139 - Fix typedoc documentation generation.
1141 ## [2.3.4] - 2022-10-17
1145 - Fully automate release process with release-it.
1149 - Optimize fair share task scheduling algorithm implementation.
1150 - Update benchmark versus external pools results with latest version.
1152 ## [2.3.3] - 2022-10-15
1156 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
1158 ## [2.3.2] - 2022-10-14
1162 - Optimize fair share worker selection strategy implementation.
1166 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
1168 ## [2.3.1] - 2022-10-13
1172 - Pool worker choice strategies:
1173 - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
1174 - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
1176 ## [2.2.2] - 2022-10-09
1180 - Fixed `README.md` file.
1182 ## [2.2.1] - 2022-10-08
1186 - Dynamic worker choice strategy change at runtime.
1188 ## [2.2.0] - 2022-01-05
1190 ### Breaking Changes
1192 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
1194 ## [2.1.0] - 2021-08-29
1198 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
1200 ### Breaking Changes
1202 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
1203 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
1204 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
1205 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
1207 ## [2.0.2] - 2021-05-12
1211 - Fix `busy` event emission on fixed pool type
1213 ## [2.0.1] - 2021-03-16
1217 - Check if pool options are properly set.
1218 - `busy` event is emitted on all pool types.
1220 ## [2.0.0] - 2021-03-01
1224 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1226 ### Breaking Changes
1228 - `FullPool` event is now renamed to `busy`.
1229 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1230 _Find more details on our JSDoc._
1232 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1234 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1236 ### Pool options types declaration merge
1238 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1240 #### New `export` strategy
1244 const DynamicThreadPool = require('poolifier/lib/dynamic')
1246 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1249 But you should always prefer just using
1252 const { DynamicThreadPool } = require('poolifier')
1255 #### New type definitions for input data and response
1257 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1258 _This is not a limitation by poolifier but Node.js._
1260 #### Public property replacements
1262 `numWorkers` property is now `numberOfWorkers`
1264 #### Internal (protected) properties and methods renaming
1266 These properties are not intended for end users
1268 - `id` => `nextMessageId`
1270 These methods are not intended for end users
1272 - `_chooseWorker` => `chooseWorker`
1273 - `_newWorker` => `createWorker`
1274 - `_execute` => `internalExecute`
1275 - `_chooseWorker` => `chooseWorker`
1276 - `_checkAlive` => `checkAlive`
1278 - `_runAsync` => `runAsync`
1280 ## [1.1.0] - 2020-05-21
1284 - ThreadWorker support async functions as option
1285 - Various external library patches
1287 ## [1.0.0] - 2020-01-24
1291 - FixedThreadPool implementation
1292 - DynamicThreadPool implementation
1293 - WorkerThread implementation to improve developer experience