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 - Ensure the minimum number of workers on a started pool is guaranteed.
14 ## [3.1.27] - 2024-03-27
18 - Fix publishing on JSR, take 4.
20 ## [3.1.26] - 2024-03-27
24 - Fix publishing on JSR, take 3.
26 ## [3.1.25] - 2024-03-27
30 - Fix publishing on JSR, take 2.
32 ## [3.1.24] - 2024-03-27
36 - Fix publishing on JSR.
38 ## [3.1.23] - 2024-03-27
44 ## [3.1.22] - 2024-03-15
48 - Fix pool event emitter registered callbacks removal at `destroy()`.
50 ## [3.1.21] - 2024-02-22
54 - Fix null exception regression: [#1496](https://github.com/poolifier/poolifier/issues/1496).
56 ## [3.1.20] - 2024-02-11
60 - Ensure `worker_threads` workers are unreferenced at termination.
62 ## [3.1.19] - 2024-01-16
66 - Fix possible null exception at task finishing handling.
70 - Optimize Deque implementation to improve tasks queueing performance.
72 ## [3.1.18] - 2024-01-06
76 - Fix dynamic pool with minimum number of workers set to zero: [#1748](https://github.com/poolifier/poolifier/issues/1748).
78 ## [3.1.17] - 2024-01-05
82 - Improve performance by clean up unneeded condition checks on hot code paths.
84 ## [3.1.16] - 2024-01-03
88 - Add missing type to TS type definitions.
90 ## [3.1.15] - 2024-01-02
94 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
96 ## [3.1.15-0] - 2024-01-02
100 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
102 ## [3.1.14] - 2024-01-01
106 - Properly handle dynamic pool with zero minimum size.
108 ## [3.1.13] - 2023-12-30
112 - Reduce branching in several hot code paths.
113 - Use faster object cloning implementation.
115 ## [3.1.12] - 2023-12-27
119 - Fix tasks redistribution triggers at pool destroying.
123 - Switch TypeScript module resolution to Node16.
125 ## [3.1.12-0] - 2023-12-27
129 - Fix tasks redistribution triggers at pool destroying.
131 ## [3.1.11] - 2023-12-24
135 - Avoid worker node cross tasks stealing.
136 - Ensure only half the pool worker nodes can steal tasks.
138 ## [3.1.10] - 2023-12-23
142 - Avoid useless branching on pool type.
144 ## [3.1.9] - 2023-12-22
148 - Readd ThreadPoolOptions and ClusterPoolOptions TS type aliases to PoolOptions.
150 ## [3.1.8] - 2023-12-21
154 - Fix default worker weight computation.
155 - Fix possible null exception at pool destroying.
157 ## [3.1.7] - 2023-12-20
161 - Ensure worker choice strategies implementation wait for worker node readiness: [#1748](https://github.com/poolifier/poolifier/issues/1748).
163 ## [3.1.6] - 2023-12-18
167 - Fix pool destroying with tasks queuing enabled.
169 ## [3.1.5] - 2023-12-18
173 - Add queued tasks end timeout support to worker node termination.
175 ## [3.1.4] - 2023-12-18
179 - Make more robust the fix for possible null exception at handling task execution response.
181 ## [3.1.3] - 2023-12-17
185 - Fix possible null exception at handling task execution response.
187 ## [3.1.2] - 2023-12-17
191 - Wait for queued tasks to end at worker node termination.
193 ## [3.1.1] - 2023-12-16
197 - Fix pool options TS type definition.
199 ## [3.1.0] - 2023-12-16
203 - TypeScript breaking change: merge ThreadPoolOptions and ClusterPoolOptions types into PoolOptions type.
205 ## [3.0.14] - 2023-12-13
209 - Fix possible null exception with worker_threads pools.
211 ## [3.0.13] - 2023-12-12
215 - Ensure worker choice strategy wait for worker nodes readiness.
219 - Remove infinite retries support in worker choice strategy to avoid configuration leading to possible infinite recursion or loop.
221 ## [3.0.12] - 2023-12-12
225 - Add infinite retries support in worker choice strategy.
227 ## [3.0.11] - 2023-12-11
231 - Ensure pool asynchronous resource properly track tasks execution.
233 ## [3.0.10] - 2023-12-08
237 - Add a fastpath when tasks stealing or redistribution is impossible.
239 ## [3.0.9] - 2023-11-26
243 - Remove all pool events listener at pool destroying.
244 - Remove all worker node events listener at worker node destroying.
245 - Fix worker node event emitter listeners handling memory leak at pool options runtime change.
247 ## [3.0.8] - 2023-11-25
251 - Ensure continuous tasks stealing on idle start at worker node idling.
253 ## [3.0.7] - 2023-11-24
257 - Make continuous tasks stealing start at worker node idling.
259 ## [3.0.6] - 2023-11-24
263 - Ensure pool statuses are checked at initialization, `start()` or `destroy()`.
264 - Ensure pool `ready` event can be emitted after several `start()/destroy()` cycles.
266 ## [3.0.5] - 2023-10-27
270 - Ensure pool `ready` event can be emitted only once.
272 ## [3.0.4] - 2023-10-20
276 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
277 - Use builtin retry mechanism in worker choice strategies instead of custom one.
279 ## [3.0.3] - 2023-10-19
283 - Avoid null exception at sending message to worker.
284 - Avoid null exception at checking worker node readiness.
286 ## [3.0.2] - 2023-10-17
290 - 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).
292 ## [3.0.1] - 2023-10-16
296 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
300 - Switch the worker node eventing code to `EventTarget` API.
302 ## [3.0.0] - 2023-10-08
306 - Remove Node.js 16.x.x (EOL) support.
308 ## [2.7.5] - 2023-10-03
312 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
314 ## [2.7.4] - 2023-09-25
318 - Fix source maps (bundler issue).
320 ## [2.7.3] - 2023-09-24
324 - Convert pool event emitter to event emitter async resource.
326 ## [2.7.2] - 2023-09-23
330 - Add source maps to npm package to ease debugging.
334 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
336 ## [2.7.1] - 2023-09-20
340 - Ensure worker message listener used one time are removed after usage.
342 ## [2.7.0] - 2023-09-19
346 - Fix task stealing related tasks queue options handling at runtime.
350 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
354 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
355 - Stricter worker constructor arguments validation.
357 ## [2.6.45] - 2023-09-17
361 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
365 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
366 - Add `start()` method to pool API to start the minimum number of workers.
367 - 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.
368 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
370 ## [2.6.44] - 2023-09-08
374 - Use a dedicated PAT to publish on GitHub packages registry.
378 - Publish on GitHub packages registry on release.
382 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
384 ## [2.6.43] - 2023-09-08
388 - Publish on GitHub packages registry on release.
392 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
394 ## [2.6.42] - 2023-09-06
398 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
400 ## [2.6.41] - 2023-09-03
404 - Optimize worker choice strategies implementation.
406 ## [2.6.40] - 2023-09-01
410 - Do not pre-choose in WRR worker choice strategy to avoid bias.
411 - Avoid array out of bound in worker choice strategies after worker node removal.
413 ## [2.6.39] - 2023-08-30
417 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
419 ## [2.6.38] - 2023-08-30
423 - Bundle typescript types declaration into one file.
427 - Improve interleaved weighted round robin worker choice strategy implementation.
429 ## [2.6.37] - 2023-08-28
433 - Ensure unused worker usage statistics are deleted at runtime.
437 - Rename worker choice strategy options `choiceRetries` to `retries`.
438 - Avoid unnecessary branching in worker choice strategies.
440 ## [2.6.36] - 2023-08-27
444 - Fix pool `execute()` arguments check.
448 - Make continuous tasks stealing algorithm less aggressive.
449 - Fine tune tasks stealing algorithm under back pressure.
451 ## [2.6.35] - 2023-08-25
455 - Don't account worker usage statistics for tasks that have failed.
456 - Fix pool information runtime and wait time median computation.
460 - Update simple moving average implementation to use a circular buffer.
461 - Update simple moving median implementation to use a circular buffer.
462 - Account for stolen tasks in worker usage statistics and pool information.
466 - Continuous tasks stealing algorithm.
468 ## [2.6.34] - 2023-08-24
472 - Avoid cascading tasks stealing under back pressure.
476 - Add fastpath to queued tasks rescheduling.
478 ## [2.6.33] - 2023-08-24
482 - Fix queued tasks rescheduling.
486 - Rename tasks queue options `queueMaxSize` to `size`.
490 - Task stealing scheduling algorithm if tasks queueing is enabled.
492 ## [2.6.32] - 2023-08-23
496 - Ensure no task can be executed when the pool is destroyed.
500 - Add `queueMaxSize` option to tasks queue options.
501 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
502 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
504 ## [2.6.31] - 2023-08-20
508 - Fix worker choice strategy retries mechanism in some edge cases.
512 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
513 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
515 ## [2.6.30] - 2023-08-19
519 - Ensure pool event `backPressure` is emitted.
520 - Ensure pool event `full` is emitted only once.
521 - Ensure worker node cannot be instantiated without proper arguments.
523 ## [2.6.29] - 2023-08-18
527 - Fix race condition between readiness and task functions worker message handling at startup.
528 - Fix duplicate task function worker usage statistics computation per task function.
529 - Update task function worker usage statistics if and only if there's at least two different task functions.
530 - Fix race condition at task function worker usage executing task computation leading to negative value.
534 - 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).
535 - Use back pressure detection in worker choice strategies.
536 - Add worker choice strategies retries mechanism if no worker is eligible.
538 ## [2.6.28] - 2023-08-16
542 - Ensure pool workers are properly initialized.
546 - HTTP server pool examples: express-cluster, express-hybrid.
550 - Remove now useless branching in worker hot code path.
552 ## [2.6.27] - 2023-08-15
556 - Add `KillHandler` type definition to exported types.
560 - Add `destroy` event to pool API.
562 ## [2.6.26] - 2023-08-15
566 - Add kill handler to worker options allowing to execute custom code when worker is killed.
567 - Add `listTaskFunctions()` method to pool API.
568 - SMTP client pool example: nodemailer.
570 ## [2.6.25] - 2023-08-13
574 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
575 - WebSocket server pool examples: ws-cluster, ws-hybrid.
577 ## [2.6.24] - 2023-08-12
581 - Add array of transferable objects to the `execute()` method arguments.
582 - WebSocket server pool examples: ws-worker_threads.
584 ## [2.6.23] - 2023-08-11
588 - 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.
592 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
593 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
595 ## [2.6.22] - 2023-08-10
599 - Add missing `types` field to package.json `exports`.
603 - Structure markdown documentation (PR #811).
605 ## [2.6.21] - 2023-08-03
609 - Improve code documentation.
610 - Code refactoring and cleanup for better maintainability and readability.
612 ## [2.6.20] - 2023-07-21
616 - Fix queued tasks redistribution on error task execution starvation.
617 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
621 - Drastically reduce lookups by worker in the worker nodes.
623 ## [2.6.19] - 2023-07-20
627 - Dedicated internal communication channel for worker_threads pools.
629 ## [2.6.18] - 2023-07-19
633 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
635 ## [2.6.17] - 2023-07-16
639 - Add `listTaskFunctions()` method to worker API.
641 ## [2.6.16] - 2023-07-12
645 - Fix pool startup detection.
646 - Fix worker task functions handling.
648 ## [2.6.15] - 2023-07-11
652 - Take into account worker node readiness in worker choice strategies.
654 ## [2.6.14] - 2023-07-10
658 - Fix task function statistics tracking.
660 ## [2.6.13] - 2023-07-10
664 - Add per task function statistics tracking.
665 - Add public methods to manipulate the worker task functions at runtime.
667 ## [2.6.12] - 2023-07-09
671 - Workaround import issue with `node:os` module in node 16.x.x.
673 ## [2.6.11] - 2023-07-09
677 - Fix pool readiness semantic.
679 ## [2.6.10] - 2023-07-08
683 - Ensure workers are not recreated on error at pool startup.
687 - Add `ready` and `strategy` fields to pool information.
688 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
689 - Add dynamic pool sizing checks.
691 ## [2.6.9] - 2023-07-07
695 - Recreate the right worker type on uncaught exception.
699 - Add minimum and maximum to internal measurement statistics.
700 - Add `runTime` and `waitTime` to pool information.
701 - Check worker inactive time only on dynamic worker.
703 ## [2.6.8] - 2023-07-03
707 - Brown paper bag release to fix version handling in pool information.
709 ## [2.6.7] - 2023-07-03
713 - Ensure worker queued tasks at error are reassigned to other pool workers.
717 - Add pool `utilization` ratio to pool information.
718 - Add `version` to pool information.
719 - Add worker information to worker nodes.
721 ## [2.6.6] - 2023-07-01
725 - Add safe helper `availableParallelism()` to help sizing the pool.
729 - Ensure message handler is only registered in worker.
731 ## [2.6.5] - 2023-06-27
735 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
739 - Artificial version bump to 2.6.5 to workaround publication issue.
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 ## [2.6.4] - 2023-06-27
752 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
756 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
757 - Ensure pool event is emitted before task error promise rejection.
758 - Fix queued tasks count computation.
762 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
764 ## [2.6.3] - 2023-06-19
768 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
769 - Update strategies internals after statistics computation.
773 - Optimize O(1) queue implementation.
775 ## [2.6.2] - 2023-06-12
779 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
781 ## [2.6.1] - 2023-06-10
785 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
789 - Fix average statistics computation: ensure failed tasks are not accounted.
791 ## [2.6.0] - 2023-06-09
795 - Add `LEAST_ELU` worker choice strategy (experimental).
796 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
800 - Refactor pool worker node usage internals.
801 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
802 - Breaking change: pool information `info` property object fields have been renamed.
806 - Fix wait time accounting.
807 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
808 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
810 ## [2.5.4] - 2023-06-07
814 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
818 - Compute statistics at the worker level only if needed.
819 - Add `worker_threads` options to thread pool options.
823 - Make the `LEAST_BUSY` strategy only relies on task runtime.
825 ## [2.5.3] - 2023-06-04
829 - Refine pool information content.
830 - Limit pool internals public exposure.
832 ## [2.5.2] - 2023-06-02
836 - Add `taskError` pool event for task execution error.
837 - Add pool information `info` property to pool.
838 - Emit pool information on `busy` and `full` pool events.
840 ## [2.5.1] - 2023-06-01
844 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
845 - Add `error` pool event for uncaught worker error.
847 ## [2.5.0] - 2023-05-31
851 - Switch pool event emitter to `EventEmitterAsyncResource`.
852 - Add tasks wait time accounting in per worker tasks usage.
853 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
857 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
859 ## [2.4.14] - 2023-05-09
863 - Ensure no undefined task runtime can land in the tasks history.
864 - Fix median computation implementation once again.
868 - Unit tests for median and queue implementations.
870 ## [2.4.13] - 2023-05-08
874 - Fix worker choice strategy options validation.
875 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
877 ## [2.4.12] - 2023-05-06
881 - Support multiple task functions per worker.
882 - Add custom worker weights support to worker choice strategies options.
886 - Use O(1) queue implementation for tasks queueing.
890 - Fix median computation implementation.
891 - Fix fair share worker choice strategy internals update.
893 ## [2.4.11] - 2023-04-23
897 - Optimize free worker finding in worker choice strategies.
899 ## [2.4.10] - 2023-04-15
903 - Fix typescript type definition for task function: ensure the input data is optional.
904 - Fix typescript type definition for pool execute(): ensure the input data is optional.
906 ## [2.4.9] - 2023-04-15
910 - Add tasks queue enablement runtime setter to pool.
911 - Add tasks queue options runtime setter to pool.
912 - Add worker choice strategy options runtime setter to pool.
916 - Remove the tasks queuing experimental status.
920 - Fix task function type definition and validation.
921 - Fix worker choice strategy options handling.
923 ## [2.4.8] - 2023-04-12
927 - Fix message between main worker and worker type definition for tasks.
928 - Fix code documentation.
930 ## [2.4.7] - 2023-04-11
934 - Add worker tasks queue options to pool options.
938 - Fix missing documentation.
940 ## [2.4.6] - 2023-04-10
944 - Ensure one task at a time is executed per worker with tasks queueing enabled.
945 - Properly count worker executing tasks with tasks queueing enabled.
947 ## [2.4.5] - 2023-04-09
951 - Use monotonic high resolution timer for worker tasks runtime.
952 - Add worker tasks median runtime to statistics.
953 - Add worker tasks queue (experimental).
955 ## [2.4.4] - 2023-04-07
959 - Add `PoolEvents` enumeration and `PoolEvent` type.
963 - Destroy worker only on alive check.
965 ## [2.4.3] - 2023-04-07
969 - Fix typedoc generation with inheritance.
971 ## [2.4.2] - 2023-04-06
975 - Add `full` event to dynamic pool.
976 - Keep worker choice strategy in memory for conditional reuse.
980 - Fix possible negative worker key at worker removal in worker choice strategies.
982 ## [2.4.1] - 2023-04-05
986 - Optimize worker choice strategy for dynamic pool.
990 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
992 ## [2.4.0] - 2023-04-04
996 - Add `LESS_BUSY` worker choice strategy.
1000 - Optimize worker storage in pool.
1001 - Optimize worker alive status check.
1002 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1003 - Optimize `LESS_USED` worker choice strategy.
1004 - Update benchmark versus external threads pools.
1005 - Optimize tasks usage statistics requirements for worker choice strategy.
1009 - Ensure trimmable characters are checked at pool initialization.
1010 - Fix message id integer overflow.
1011 - Fix pool worker removal in worker choice strategy internals.
1012 - Fix package publication with pnpm.
1014 ## [2.4.0-3] - 2023-04-04
1018 - Add `LESS_BUSY` worker choice strategy.
1022 - Optimize worker storage in pool.
1023 - Optimize worker alive status check.
1024 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1025 - Optimize `LESS_USED` worker choice strategy.
1026 - Update benchmark versus external threads pools.
1030 - Ensure trimmable characters are checked at pool initialization.
1031 - Fix message id integer overflow.
1032 - Fix pool worker removal in worker choice strategy internals.
1033 - Fix package publication with pnpm.
1035 ## [2.4.0-2] - 2023-04-03
1039 - Add `LESS_BUSY` worker choice strategy.
1043 - Optimize worker storage in pool.
1044 - Optimize worker alive status check.
1045 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1046 - Optimize `LESS_USED` worker choice strategy.
1050 - Ensure trimmable characters are checked at pool initialization.
1051 - Fix message id integer overflow.
1052 - Fix pool worker removal in worker choice strategy internals.
1053 - Fix package publication with pnpm.
1055 ## [2.4.0-1] - 2023-04-03
1059 - Add `LESS_BUSY` worker choice strategy.
1063 - Optimize worker storage in pool.
1064 - Optimize worker alive status check.
1065 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1066 - Optimize `LESS_USED` worker choice strategy.
1070 - Ensure trimmable characters are checked at pool initialization.
1071 - Fix message id integer overflow.
1072 - Fix pool worker removal in worker choice strategy internals.
1074 ## [2.4.0-0] - 2023-04-03
1078 - Add `LESS_BUSY` worker choice strategy.
1082 - Optimize worker storage in pool.
1083 - Optimize worker alive status check.
1084 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1085 - Optimize `LESS_USED` worker choice strategy.
1089 - Ensure trimmable characters are checked at pool initialization.
1090 - Fix message id integer overflow.
1091 - Fix pool worker removal in worker choice strategy internals.
1093 ## [2.3.10] - 2023-03-18
1097 - Fix package.json `exports` syntax for ESM and CommonJS.
1101 - Permit SemVer pre-release publication.
1103 ## [2.3.10-2] - 2023-03-18
1107 - Fix package.json `exports` syntax for ESM and CommonJS.
1109 ## [2.3.10-1] - 2023-03-18
1113 - Permit SemVer pre-release publication.
1115 ## [2.3.10-0] - 2023-03-18
1119 - Fix package.json `exports` syntax for ESM and CommonJS.
1121 ## [2.3.9] - 2023-03-18
1125 - Introduce ESM module support along with CommonJS one.
1129 - Fix brown paper bag bug referencing the same object literal.
1131 ## [2.3.8] - 2023-03-18
1135 - Switch internal benchmarking code to benny.
1136 - Switch to TypeScript 5.x.x.
1137 - Switch rollup bundler plugins to core ones.
1138 - Switch to TSDoc syntax.
1139 - Enforce conventional commits.
1143 - Fix random integer generator.
1144 - Fix worker choice strategy pool type identification at initialization.
1146 ## [2.3.7] - 2022-10-23
1150 - Switch to open collective FOSS project funding platform.
1151 - Switch to ts-standard linter configuration on TypeScript code.
1155 - Fixed missing async on pool execute method.
1156 - Fixed typing in TypeScript example.
1157 - Fixed types in unit tests.
1159 ## [2.3.6] - 2022-10-22
1163 - Cleanup pool attributes and methods.
1164 - Refine error types thrown.
1168 - Fix continuous integration build on windows.
1169 - Fix code coverage reporting by using c8 instead of nyc.
1171 ## [2.3.5] - 2022-10-21
1175 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
1176 - Optimize tasks usage lookup implementation.
1180 - Fix missed pool event emitter type export.
1181 - Fix typedoc documentation generation.
1183 ## [2.3.4] - 2022-10-17
1187 - Fully automate release process with release-it.
1191 - Optimize fair share task scheduling algorithm implementation.
1192 - Update benchmark versus external pools results with latest version.
1194 ## [2.3.3] - 2022-10-15
1198 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
1200 ## [2.3.2] - 2022-10-14
1204 - Optimize fair share worker selection strategy implementation.
1208 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
1210 ## [2.3.1] - 2022-10-13
1214 - Pool worker choice strategies:
1215 - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
1216 - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
1218 ## [2.2.2] - 2022-10-09
1222 - Fixed `README.md` file.
1224 ## [2.2.1] - 2022-10-08
1228 - Dynamic worker choice strategy change at runtime.
1230 ## [2.2.0] - 2022-01-05
1232 ### Breaking Changes
1234 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
1236 ## [2.1.0] - 2021-08-29
1240 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
1242 ### Breaking Changes
1244 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
1245 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
1246 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
1247 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
1249 ## [2.0.2] - 2021-05-12
1253 - Fix `busy` event emission on fixed pool type
1255 ## [2.0.1] - 2021-03-16
1259 - Check if pool options are properly set.
1260 - `busy` event is emitted on all pool types.
1262 ## [2.0.0] - 2021-03-01
1266 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1268 ### Breaking Changes
1270 - `FullPool` event is now renamed to `busy`.
1271 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1272 _Find more details on our JSDoc._
1274 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1276 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1278 ### Pool options types declaration merge
1280 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1282 #### New `export` strategy
1286 const DynamicThreadPool = require('poolifier/lib/dynamic')
1288 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1291 But you should always prefer just using
1294 const { DynamicThreadPool } = require('poolifier')
1297 #### New type definitions for input data and response
1299 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1300 _This is not a limitation by poolifier but Node.js._
1302 #### Public property replacements
1304 `numWorkers` property is now `numberOfWorkers`
1306 #### Internal (protected) properties and methods renaming
1308 These properties are not intended for end users
1310 - `id` => `nextMessageId`
1312 These methods are not intended for end users
1314 - `_chooseWorker` => `chooseWorker`
1315 - `_newWorker` => `createWorker`
1316 - `_execute` => `internalExecute`
1317 - `_chooseWorker` => `chooseWorker`
1318 - `_checkAlive` => `checkAlive`
1320 - `_runAsync` => `runAsync`
1322 ## [1.1.0] - 2020-05-21
1326 - ThreadWorker support async functions as option
1327 - Various external library patches
1329 ## [1.0.0] - 2020-01-24
1333 - FixedThreadPool implementation
1334 - DynamicThreadPool implementation
1335 - WorkerThread implementation to improve developer experience