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).
14 ## [3.1.22] - 2024-03-15
18 - Fix pool event emitter registered callbacks removal at `destroy()`.
20 ## [3.1.21] - 2024-02-22
24 - Fix null exception regression: [#1496](https://github.com/poolifier/poolifier/issues/1496).
26 ## [3.1.20] - 2024-02-11
30 - Ensure `worker_threads` workers are unreferenced at termination.
32 ## [3.1.19] - 2024-01-16
36 - Fix possible null exception at task finishing handling.
40 - Optimize Deque implementation to improve tasks queueing performance.
42 ## [3.1.18] - 2024-01-06
46 - Fix dynamic pool with minimum number of workers set to zero: [#1748](https://github.com/poolifier/poolifier/issues/1748).
48 ## [3.1.17] - 2024-01-05
52 - Improve performance by clean up unneeded condition checks on hot code paths.
54 ## [3.1.16] - 2024-01-03
58 - Add missing type to TS type definitions.
60 ## [3.1.15] - 2024-01-02
64 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
66 ## [3.1.15-0] - 2024-01-02
70 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
72 ## [3.1.14] - 2024-01-01
76 - Properly handle dynamic pool with zero minimum size.
78 ## [3.1.13] - 2023-12-30
82 - Reduce branching in several hot code paths.
83 - Use faster object cloning implementation.
85 ## [3.1.12] - 2023-12-27
89 - Fix tasks redistribution triggers at pool destroying.
93 - Switch TypeScript module resolution to Node16.
95 ## [3.1.12-0] - 2023-12-27
99 - Fix tasks redistribution triggers at pool destroying.
101 ## [3.1.11] - 2023-12-24
105 - Avoid worker node cross tasks stealing.
106 - Ensure only half the pool worker nodes can steal tasks.
108 ## [3.1.10] - 2023-12-23
112 - Avoid useless branching on pool type.
114 ## [3.1.9] - 2023-12-22
118 - Readd ThreadPoolOptions and ClusterPoolOptions TS type aliases to PoolOptions.
120 ## [3.1.8] - 2023-12-21
124 - Fix default worker weight computation.
125 - Fix possible null exception at pool destroying.
127 ## [3.1.7] - 2023-12-20
131 - Ensure worker choice strategies implementation wait for worker node readiness: [#1748](https://github.com/poolifier/poolifier/issues/1748).
133 ## [3.1.6] - 2023-12-18
137 - Fix pool destroying with tasks queuing enabled.
139 ## [3.1.5] - 2023-12-18
143 - Add queued tasks end timeout support to worker node termination.
145 ## [3.1.4] - 2023-12-18
149 - Make more robust the fix for possible null exception at handling task execution response.
151 ## [3.1.3] - 2023-12-17
155 - Fix possible null exception at handling task execution response.
157 ## [3.1.2] - 2023-12-17
161 - Wait for queued tasks to end at worker node termination.
163 ## [3.1.1] - 2023-12-16
167 - Fix pool options TS type definition.
169 ## [3.1.0] - 2023-12-16
173 - TypeScript breaking change: merge ThreadPoolOptions and ClusterPoolOptions types into PoolOptions type.
175 ## [3.0.14] - 2023-12-13
179 - Fix possible null exception with worker_threads pools.
181 ## [3.0.13] - 2023-12-12
185 - Ensure worker choice strategy wait for worker nodes readiness.
189 - Remove infinite retries support in worker choice strategy to avoid configuration leading to possible infinite recursion or loop.
191 ## [3.0.12] - 2023-12-12
195 - Add infinite retries support in worker choice strategy.
197 ## [3.0.11] - 2023-12-11
201 - Ensure pool asynchronous resource properly track tasks execution.
203 ## [3.0.10] - 2023-12-08
207 - Add a fastpath when tasks stealing or redistribution is impossible.
209 ## [3.0.9] - 2023-11-26
213 - Remove all pool events listener at pool destroying.
214 - Remove all worker node events listener at worker node destroying.
215 - Fix worker node event emitter listeners handling memory leak at pool options runtime change.
217 ## [3.0.8] - 2023-11-25
221 - Ensure continuous tasks stealing on idle start at worker node idling.
223 ## [3.0.7] - 2023-11-24
227 - Make continuous tasks stealing start at worker node idling.
229 ## [3.0.6] - 2023-11-24
233 - Ensure pool statuses are checked at initialization, `start()` or `destroy()`.
234 - Ensure pool `ready` event can be emitted after several `start()/destroy()` cycles.
236 ## [3.0.5] - 2023-10-27
240 - Ensure pool `ready` event can be emitted only once.
242 ## [3.0.4] - 2023-10-20
246 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
247 - Use builtin retry mechanism in worker choice strategies instead of custom one.
249 ## [3.0.3] - 2023-10-19
253 - Avoid null exception at sending message to worker.
254 - Avoid null exception at checking worker node readiness.
256 ## [3.0.2] - 2023-10-17
260 - 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).
262 ## [3.0.1] - 2023-10-16
266 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
270 - Switch the worker node eventing code to `EventTarget` API.
272 ## [3.0.0] - 2023-10-08
276 - Remove Node.js 16.x.x (EOL) support.
278 ## [2.7.5] - 2023-10-03
282 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
284 ## [2.7.4] - 2023-09-25
288 - Fix source maps (bundler issue).
290 ## [2.7.3] - 2023-09-24
294 - Convert pool event emitter to event emitter async resource.
296 ## [2.7.2] - 2023-09-23
300 - Add source maps to npm package to ease debugging.
304 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
306 ## [2.7.1] - 2023-09-20
310 - Ensure worker message listener used one time are removed after usage.
312 ## [2.7.0] - 2023-09-19
316 - Fix task stealing related tasks queue options handling at runtime.
320 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
324 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
325 - Stricter worker constructor arguments validation.
327 ## [2.6.45] - 2023-09-17
331 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
335 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
336 - Add `start()` method to pool API to start the minimum number of workers.
337 - 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.
338 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
340 ## [2.6.44] - 2023-09-08
344 - Use a dedicated PAT to publish on GitHub packages registry.
348 - Publish on GitHub packages registry on release.
352 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
354 ## [2.6.43] - 2023-09-08
358 - Publish on GitHub packages registry on release.
362 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
364 ## [2.6.42] - 2023-09-06
368 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
370 ## [2.6.41] - 2023-09-03
374 - Optimize worker choice strategies implementation.
376 ## [2.6.40] - 2023-09-01
380 - Do not pre-choose in WRR worker choice strategy to avoid bias.
381 - Avoid array out of bound in worker choice strategies after worker node removal.
383 ## [2.6.39] - 2023-08-30
387 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
389 ## [2.6.38] - 2023-08-30
393 - Bundle typescript types declaration into one file.
397 - Improve interleaved weighted round robin worker choice strategy implementation.
399 ## [2.6.37] - 2023-08-28
403 - Ensure unused worker usage statistics are deleted at runtime.
407 - Rename worker choice strategy options `choiceRetries` to `retries`.
408 - Avoid unnecessary branching in worker choice strategies.
410 ## [2.6.36] - 2023-08-27
414 - Fix pool `execute()` arguments check.
418 - Make continuous tasks stealing algorithm less aggressive.
419 - Fine tune tasks stealing algorithm under back pressure.
421 ## [2.6.35] - 2023-08-25
425 - Don't account worker usage statistics for tasks that have failed.
426 - Fix pool information runtime and wait time median computation.
430 - Update simple moving average implementation to use a circular buffer.
431 - Update simple moving median implementation to use a circular buffer.
432 - Account for stolen tasks in worker usage statistics and pool information.
436 - Continuous tasks stealing algorithm.
438 ## [2.6.34] - 2023-08-24
442 - Avoid cascading tasks stealing under back pressure.
446 - Add fastpath to queued tasks rescheduling.
448 ## [2.6.33] - 2023-08-24
452 - Fix queued tasks rescheduling.
456 - Rename tasks queue options `queueMaxSize` to `size`.
460 - Task stealing scheduling algorithm if tasks queueing is enabled.
462 ## [2.6.32] - 2023-08-23
466 - Ensure no task can be executed when the pool is destroyed.
470 - Add `queueMaxSize` option to tasks queue options.
471 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
472 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
474 ## [2.6.31] - 2023-08-20
478 - Fix worker choice strategy retries mechanism in some edge cases.
482 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
483 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
485 ## [2.6.30] - 2023-08-19
489 - Ensure pool event `backPressure` is emitted.
490 - Ensure pool event `full` is emitted only once.
491 - Ensure worker node cannot be instantiated without proper arguments.
493 ## [2.6.29] - 2023-08-18
497 - Fix race condition between readiness and task functions worker message handling at startup.
498 - Fix duplicate task function worker usage statistics computation per task function.
499 - Update task function worker usage statistics if and only if there's at least two different task functions.
500 - Fix race condition at task function worker usage executing task computation leading to negative value.
504 - 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).
505 - Use back pressure detection in worker choice strategies.
506 - Add worker choice strategies retries mechanism if no worker is eligible.
508 ## [2.6.28] - 2023-08-16
512 - Ensure pool workers are properly initialized.
516 - HTTP server pool examples: express-cluster, express-hybrid.
520 - Remove now useless branching in worker hot code path.
522 ## [2.6.27] - 2023-08-15
526 - Add `KillHandler` type definition to exported types.
530 - Add `destroy` event to pool API.
532 ## [2.6.26] - 2023-08-15
536 - Add kill handler to worker options allowing to execute custom code when worker is killed.
537 - Add `listTaskFunctions()` method to pool API.
538 - SMTP client pool example: nodemailer.
540 ## [2.6.25] - 2023-08-13
544 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
545 - WebSocket server pool examples: ws-cluster, ws-hybrid.
547 ## [2.6.24] - 2023-08-12
551 - Add array of transferable objects to the `execute()` method arguments.
552 - WebSocket server pool examples: ws-worker_threads.
554 ## [2.6.23] - 2023-08-11
558 - 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.
562 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
563 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
565 ## [2.6.22] - 2023-08-10
569 - Add missing `types` field to package.json `exports`.
573 - Structure markdown documentation (PR #811).
575 ## [2.6.21] - 2023-08-03
579 - Improve code documentation.
580 - Code refactoring and cleanup for better maintainability and readability.
582 ## [2.6.20] - 2023-07-21
586 - Fix queued tasks redistribution on error task execution starvation.
587 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
591 - Drastically reduce lookups by worker in the worker nodes.
593 ## [2.6.19] - 2023-07-20
597 - Dedicated internal communication channel for worker_threads pools.
599 ## [2.6.18] - 2023-07-19
603 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
605 ## [2.6.17] - 2023-07-16
609 - Add `listTaskFunctions()` method to worker API.
611 ## [2.6.16] - 2023-07-12
615 - Fix pool startup detection.
616 - Fix worker task functions handling.
618 ## [2.6.15] - 2023-07-11
622 - Take into account worker node readiness in worker choice strategies.
624 ## [2.6.14] - 2023-07-10
628 - Fix task function statistics tracking.
630 ## [2.6.13] - 2023-07-10
634 - Add per task function statistics tracking.
635 - Add public methods to manipulate the worker task functions at runtime.
637 ## [2.6.12] - 2023-07-09
641 - Workaround import issue with `node:os` module in node 16.x.x.
643 ## [2.6.11] - 2023-07-09
647 - Fix pool readiness semantic.
649 ## [2.6.10] - 2023-07-08
653 - Ensure workers are not recreated on error at pool startup.
657 - Add `ready` and `strategy` fields to pool information.
658 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
659 - Add dynamic pool sizing checks.
661 ## [2.6.9] - 2023-07-07
665 - Recreate the right worker type on uncaught exception.
669 - Add minimum and maximum to internal measurement statistics.
670 - Add `runTime` and `waitTime` to pool information.
671 - Check worker inactive time only on dynamic worker.
673 ## [2.6.8] - 2023-07-03
677 - Brown paper bag release to fix version handling in pool information.
679 ## [2.6.7] - 2023-07-03
683 - Ensure worker queued tasks at error are reassigned to other pool workers.
687 - Add pool `utilization` ratio to pool information.
688 - Add `version` to pool information.
689 - Add worker information to worker nodes.
691 ## [2.6.6] - 2023-07-01
695 - Add safe helper `availableParallelism()` to help sizing the pool.
699 - Ensure message handler is only registered in worker.
701 ## [2.6.5] - 2023-06-27
705 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
709 - Artificial version bump to 2.6.5 to workaround publication issue.
710 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
711 - Ensure pool event is emitted before task error promise rejection.
712 - Fix queued tasks count computation.
716 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
718 ## [2.6.4] - 2023-06-27
722 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
726 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
727 - Ensure pool event is emitted before task error promise rejection.
728 - Fix queued tasks count computation.
732 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
734 ## [2.6.3] - 2023-06-19
738 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
739 - Update strategies internals after statistics computation.
743 - Optimize O(1) queue implementation.
745 ## [2.6.2] - 2023-06-12
749 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
751 ## [2.6.1] - 2023-06-10
755 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
759 - Fix average statistics computation: ensure failed tasks are not accounted.
761 ## [2.6.0] - 2023-06-09
765 - Add `LEAST_ELU` worker choice strategy (experimental).
766 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
770 - Refactor pool worker node usage internals.
771 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
772 - Breaking change: pool information `info` property object fields have been renamed.
776 - Fix wait time accounting.
777 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
778 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
780 ## [2.5.4] - 2023-06-07
784 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
788 - Compute statistics at the worker level only if needed.
789 - Add `worker_threads` options to thread pool options.
793 - Make the `LEAST_BUSY` strategy only relies on task runtime.
795 ## [2.5.3] - 2023-06-04
799 - Refine pool information content.
800 - Limit pool internals public exposure.
802 ## [2.5.2] - 2023-06-02
806 - Add `taskError` pool event for task execution error.
807 - Add pool information `info` property to pool.
808 - Emit pool information on `busy` and `full` pool events.
810 ## [2.5.1] - 2023-06-01
814 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
815 - Add `error` pool event for uncaught worker error.
817 ## [2.5.0] - 2023-05-31
821 - Switch pool event emitter to `EventEmitterAsyncResource`.
822 - Add tasks wait time accounting in per worker tasks usage.
823 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
827 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
829 ## [2.4.14] - 2023-05-09
833 - Ensure no undefined task runtime can land in the tasks history.
834 - Fix median computation implementation once again.
838 - Unit tests for median and queue implementations.
840 ## [2.4.13] - 2023-05-08
844 - Fix worker choice strategy options validation.
845 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
847 ## [2.4.12] - 2023-05-06
851 - Support multiple task functions per worker.
852 - Add custom worker weights support to worker choice strategies options.
856 - Use O(1) queue implementation for tasks queueing.
860 - Fix median computation implementation.
861 - Fix fair share worker choice strategy internals update.
863 ## [2.4.11] - 2023-04-23
867 - Optimize free worker finding in worker choice strategies.
869 ## [2.4.10] - 2023-04-15
873 - Fix typescript type definition for task function: ensure the input data is optional.
874 - Fix typescript type definition for pool execute(): ensure the input data is optional.
876 ## [2.4.9] - 2023-04-15
880 - Add tasks queue enablement runtime setter to pool.
881 - Add tasks queue options runtime setter to pool.
882 - Add worker choice strategy options runtime setter to pool.
886 - Remove the tasks queuing experimental status.
890 - Fix task function type definition and validation.
891 - Fix worker choice strategy options handling.
893 ## [2.4.8] - 2023-04-12
897 - Fix message between main worker and worker type definition for tasks.
898 - Fix code documentation.
900 ## [2.4.7] - 2023-04-11
904 - Add worker tasks queue options to pool options.
908 - Fix missing documentation.
910 ## [2.4.6] - 2023-04-10
914 - Ensure one task at a time is executed per worker with tasks queueing enabled.
915 - Properly count worker executing tasks with tasks queueing enabled.
917 ## [2.4.5] - 2023-04-09
921 - Use monotonic high resolution timer for worker tasks runtime.
922 - Add worker tasks median runtime to statistics.
923 - Add worker tasks queue (experimental).
925 ## [2.4.4] - 2023-04-07
929 - Add `PoolEvents` enumeration and `PoolEvent` type.
933 - Destroy worker only on alive check.
935 ## [2.4.3] - 2023-04-07
939 - Fix typedoc generation with inheritance.
941 ## [2.4.2] - 2023-04-06
945 - Add `full` event to dynamic pool.
946 - Keep worker choice strategy in memory for conditional reuse.
950 - Fix possible negative worker key at worker removal in worker choice strategies.
952 ## [2.4.1] - 2023-04-05
956 - Optimize worker choice strategy for dynamic pool.
960 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
962 ## [2.4.0] - 2023-04-04
966 - Add `LESS_BUSY` worker choice strategy.
970 - Optimize worker storage in pool.
971 - Optimize worker alive status check.
972 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
973 - Optimize `LESS_USED` worker choice strategy.
974 - Update benchmark versus external threads pools.
975 - Optimize tasks usage statistics requirements for worker choice strategy.
979 - Ensure trimmable characters are checked at pool initialization.
980 - Fix message id integer overflow.
981 - Fix pool worker removal in worker choice strategy internals.
982 - Fix package publication with pnpm.
984 ## [2.4.0-3] - 2023-04-04
988 - Add `LESS_BUSY` worker choice strategy.
992 - Optimize worker storage in pool.
993 - Optimize worker alive status check.
994 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
995 - Optimize `LESS_USED` worker choice strategy.
996 - Update benchmark versus external threads pools.
1000 - Ensure trimmable characters are checked at pool initialization.
1001 - Fix message id integer overflow.
1002 - Fix pool worker removal in worker choice strategy internals.
1003 - Fix package publication with pnpm.
1005 ## [2.4.0-2] - 2023-04-03
1009 - Add `LESS_BUSY` worker choice strategy.
1013 - Optimize worker storage in pool.
1014 - Optimize worker alive status check.
1015 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1016 - Optimize `LESS_USED` worker choice strategy.
1020 - Ensure trimmable characters are checked at pool initialization.
1021 - Fix message id integer overflow.
1022 - Fix pool worker removal in worker choice strategy internals.
1023 - Fix package publication with pnpm.
1025 ## [2.4.0-1] - 2023-04-03
1029 - Add `LESS_BUSY` worker choice strategy.
1033 - Optimize worker storage in pool.
1034 - Optimize worker alive status check.
1035 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1036 - Optimize `LESS_USED` worker choice strategy.
1040 - Ensure trimmable characters are checked at pool initialization.
1041 - Fix message id integer overflow.
1042 - Fix pool worker removal in worker choice strategy internals.
1044 ## [2.4.0-0] - 2023-04-03
1048 - Add `LESS_BUSY` worker choice strategy.
1052 - Optimize worker storage in pool.
1053 - Optimize worker alive status check.
1054 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1055 - Optimize `LESS_USED` worker choice strategy.
1059 - Ensure trimmable characters are checked at pool initialization.
1060 - Fix message id integer overflow.
1061 - Fix pool worker removal in worker choice strategy internals.
1063 ## [2.3.10] - 2023-03-18
1067 - Fix package.json `exports` syntax for ESM and CommonJS.
1071 - Permit SemVer pre-release publication.
1073 ## [2.3.10-2] - 2023-03-18
1077 - Fix package.json `exports` syntax for ESM and CommonJS.
1079 ## [2.3.10-1] - 2023-03-18
1083 - Permit SemVer pre-release publication.
1085 ## [2.3.10-0] - 2023-03-18
1089 - Fix package.json `exports` syntax for ESM and CommonJS.
1091 ## [2.3.9] - 2023-03-18
1095 - Introduce ESM module support along with CommonJS one.
1099 - Fix brown paper bag bug referencing the same object literal.
1101 ## [2.3.8] - 2023-03-18
1105 - Switch internal benchmarking code to benny.
1106 - Switch to TypeScript 5.x.x.
1107 - Switch rollup bundler plugins to core ones.
1108 - Switch to TSDoc syntax.
1109 - Enforce conventional commits.
1113 - Fix random integer generator.
1114 - Fix worker choice strategy pool type identification at initialization.
1116 ## [2.3.7] - 2022-10-23
1120 - Switch to open collective FOSS project funding platform.
1121 - Switch to ts-standard linter configuration on TypeScript code.
1125 - Fixed missing async on pool execute method.
1126 - Fixed typing in TypeScript example.
1127 - Fixed types in unit tests.
1129 ## [2.3.6] - 2022-10-22
1133 - Cleanup pool attributes and methods.
1134 - Refine error types thrown.
1138 - Fix continuous integration build on windows.
1139 - Fix code coverage reporting by using c8 instead of nyc.
1141 ## [2.3.5] - 2022-10-21
1145 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
1146 - Optimize tasks usage lookup implementation.
1150 - Fix missed pool event emitter type export.
1151 - Fix typedoc documentation generation.
1153 ## [2.3.4] - 2022-10-17
1157 - Fully automate release process with release-it.
1161 - Optimize fair share task scheduling algorithm implementation.
1162 - Update benchmark versus external pools results with latest version.
1164 ## [2.3.3] - 2022-10-15
1168 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
1170 ## [2.3.2] - 2022-10-14
1174 - Optimize fair share worker selection strategy implementation.
1178 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
1180 ## [2.3.1] - 2022-10-13
1184 - Pool worker choice strategies:
1185 - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
1186 - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
1188 ## [2.2.2] - 2022-10-09
1192 - Fixed `README.md` file.
1194 ## [2.2.1] - 2022-10-08
1198 - Dynamic worker choice strategy change at runtime.
1200 ## [2.2.0] - 2022-01-05
1202 ### Breaking Changes
1204 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
1206 ## [2.1.0] - 2021-08-29
1210 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
1212 ### Breaking Changes
1214 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
1215 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
1216 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
1217 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
1219 ## [2.0.2] - 2021-05-12
1223 - Fix `busy` event emission on fixed pool type
1225 ## [2.0.1] - 2021-03-16
1229 - Check if pool options are properly set.
1230 - `busy` event is emitted on all pool types.
1232 ## [2.0.0] - 2021-03-01
1236 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1238 ### Breaking Changes
1240 - `FullPool` event is now renamed to `busy`.
1241 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1242 _Find more details on our JSDoc._
1244 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1246 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1248 ### Pool options types declaration merge
1250 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1252 #### New `export` strategy
1256 const DynamicThreadPool = require('poolifier/lib/dynamic')
1258 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1261 But you should always prefer just using
1264 const { DynamicThreadPool } = require('poolifier')
1267 #### New type definitions for input data and response
1269 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1270 _This is not a limitation by poolifier but Node.js._
1272 #### Public property replacements
1274 `numWorkers` property is now `numberOfWorkers`
1276 #### Internal (protected) properties and methods renaming
1278 These properties are not intended for end users
1280 - `id` => `nextMessageId`
1282 These methods are not intended for end users
1284 - `_chooseWorker` => `chooseWorker`
1285 - `_newWorker` => `createWorker`
1286 - `_execute` => `internalExecute`
1287 - `_chooseWorker` => `chooseWorker`
1288 - `_checkAlive` => `checkAlive`
1290 - `_runAsync` => `runAsync`
1292 ## [1.1.0] - 2020-05-21
1296 - ThreadWorker support async functions as option
1297 - Various external library patches
1299 ## [1.0.0] - 2020-01-24
1303 - FixedThreadPool implementation
1304 - DynamicThreadPool implementation
1305 - WorkerThread implementation to improve developer experience