3 All notable changes to this project will be documented in this file.
5 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
6 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
10 ## [3.1.17] - 2024-01-05
14 - Improve performance by clean up unneeded condition checks on hot code paths.
16 ## [3.1.16] - 2024-01-03
20 - Add missing type to TS type definitions.
22 ## [3.1.15] - 2024-01-02
26 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
28 ## [3.1.15-0] - 2024-01-02
32 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
34 ## [3.1.14] - 2024-01-01
38 - Properly handle dynamic pool with zero minimum size.
40 ## [3.1.13] - 2023-12-30
44 - Reduce branching in several hot code paths.
45 - Use faster object cloning implementation.
47 ## [3.1.12] - 2023-12-27
51 - Fix tasks redistribution triggers at pool destroying.
55 - Switch TypeScript module resolution to Node16.
57 ## [3.1.12-0] - 2023-12-27
61 - Fix tasks redistribution triggers at pool destroying.
63 ## [3.1.11] - 2023-12-24
67 - Avoid worker node cross tasks stealing.
68 - Ensure only half the pool worker nodes can steal tasks.
70 ## [3.1.10] - 2023-12-23
74 - Avoid useless branching on pool type.
76 ## [3.1.9] - 2023-12-22
80 - Readd ThreadPoolOptions and ClusterPoolOptions TS type aliases to PoolOptions.
82 ## [3.1.8] - 2023-12-21
86 - Fix default worker weight computation.
87 - Fix possible null exception at pool destroying.
89 ## [3.1.7] - 2023-12-20
93 - Ensure worker choice strategies implementation wait for worker node readiness: [#1748](https://github.com/poolifier/poolifier/issues/1748).
95 ## [3.1.6] - 2023-12-18
99 - Fix pool destroying with tasks queuing enabled.
101 ## [3.1.5] - 2023-12-18
105 - Add queued tasks end timeout support to worker node termination.
107 ## [3.1.4] - 2023-12-18
111 - Make more robust the fix for possible null exception at handling task execution response.
113 ## [3.1.3] - 2023-12-17
117 - Fix possible null exception at handling task execution response.
119 ## [3.1.2] - 2023-12-17
123 - Wait for queued tasks to end at worker node termination.
125 ## [3.1.1] - 2023-12-16
129 - Fix pool options TS type definition.
131 ## [3.1.0] - 2023-12-16
135 - TypeScript breaking change: merge ThreadPoolOptions and ClusterPoolOptions types into PoolOptions type.
137 ## [3.0.14] - 2023-12-13
141 - Fix possible null exception with worker_threads pools.
143 ## [3.0.13] - 2023-12-12
147 - Ensure worker choice strategy wait for worker nodes readiness.
151 - Remove infinite retries support in worker choice strategy to avoid configuration leading to possible infinite recursion or loop.
153 ## [3.0.12] - 2023-12-12
157 - Add infinite retries support in worker choice strategy.
159 ## [3.0.11] - 2023-12-11
163 - Ensure pool asynchronous resource properly track tasks execution.
165 ## [3.0.10] - 2023-12-08
169 - Add a fastpath when tasks stealing or redistribution is impossible.
171 ## [3.0.9] - 2023-11-26
175 - Remove all pool events listener at pool destroying.
176 - Remove all worker node events listener at worker node destroying.
177 - Fix worker node event emitter listeners handling memory leak at pool options runtime change.
179 ## [3.0.8] - 2023-11-25
183 - Ensure continuous tasks stealing on idle start at worker node idling.
185 ## [3.0.7] - 2023-11-24
189 - Make continuous tasks stealing start at worker node idling.
191 ## [3.0.6] - 2023-11-24
195 - Ensure pool statuses are checked at initialization, `start()` or `destroy()`.
196 - Ensure pool `ready` event can be emitted after several `start()/destroy()` cycles.
198 ## [3.0.5] - 2023-10-27
202 - Ensure pool `ready` event can be emitted only once.
204 ## [3.0.4] - 2023-10-20
208 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
209 - Use builtin retry mechanism in worker choice strategies instead of custom one.
211 ## [3.0.3] - 2023-10-19
215 - Avoid null exception at sending message to worker.
216 - Avoid null exception at checking worker node readiness.
218 ## [3.0.2] - 2023-10-17
222 - 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).
224 ## [3.0.1] - 2023-10-16
228 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
232 - Switch the worker node eventing code to `EventTarget` API.
234 ## [3.0.0] - 2023-10-08
238 - Remove Node.js 16.x.x (EOL) support.
240 ## [2.7.5] - 2023-10-03
244 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
246 ## [2.7.4] - 2023-09-25
250 - Fix source maps (bundler issue).
252 ## [2.7.3] - 2023-09-24
256 - Convert pool event emitter to event emitter async resource.
258 ## [2.7.2] - 2023-09-23
262 - Add source maps to npm package to ease debugging.
266 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
268 ## [2.7.1] - 2023-09-20
272 - Ensure worker message listener used one time are removed after usage.
274 ## [2.7.0] - 2023-09-19
278 - Fix task stealing related tasks queue options handling at runtime.
282 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
286 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
287 - Stricter worker constructor arguments validation.
289 ## [2.6.45] - 2023-09-17
293 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
297 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
298 - Add `start()` method to pool API to start the minimum number of workers.
299 - 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.
300 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
302 ## [2.6.44] - 2023-09-08
306 - Use a dedicated PAT to publish on GitHub packages registry.
310 - Publish on GitHub packages registry on release.
314 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
316 ## [2.6.43] - 2023-09-08
320 - Publish on GitHub packages registry on release.
324 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
326 ## [2.6.42] - 2023-09-06
330 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
332 ## [2.6.41] - 2023-09-03
336 - Optimize worker choice strategies implementation.
338 ## [2.6.40] - 2023-09-01
342 - Do not pre-choose in WRR worker choice strategy to avoid bias.
343 - Avoid array out of bound in worker choice strategies after worker node removal.
345 ## [2.6.39] - 2023-08-30
349 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
351 ## [2.6.38] - 2023-08-30
355 - Bundle typescript types declaration into one file.
359 - Improve interleaved weighted round robin worker choice strategy implementation.
361 ## [2.6.37] - 2023-08-28
365 - Ensure unused worker usage statistics are deleted at runtime.
369 - Rename worker choice strategy options `choiceRetries` to `retries`.
370 - Avoid unnecessary branching in worker choice strategies.
372 ## [2.6.36] - 2023-08-27
376 - Fix pool `execute()` arguments check.
380 - Make continuous tasks stealing algorithm less aggressive.
381 - Fine tune tasks stealing algorithm under back pressure.
383 ## [2.6.35] - 2023-08-25
387 - Don't account worker usage statistics for tasks that have failed.
388 - Fix pool information runtime and wait time median computation.
392 - Update simple moving average implementation to use a circular buffer.
393 - Update simple moving median implementation to use a circular buffer.
394 - Account for stolen tasks in worker usage statistics and pool information.
398 - Continuous tasks stealing algorithm.
400 ## [2.6.34] - 2023-08-24
404 - Avoid cascading tasks stealing under back pressure.
408 - Add fastpath to queued tasks rescheduling.
410 ## [2.6.33] - 2023-08-24
414 - Fix queued tasks rescheduling.
418 - Rename tasks queue options `queueMaxSize` to `size`.
422 - Task stealing scheduling algorithm if tasks queueing is enabled.
424 ## [2.6.32] - 2023-08-23
428 - Ensure no task can be executed when the pool is destroyed.
432 - Add `queueMaxSize` option to tasks queue options.
433 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
434 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
436 ## [2.6.31] - 2023-08-20
440 - Fix worker choice strategy retries mechanism in some edge cases.
444 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
445 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
447 ## [2.6.30] - 2023-08-19
451 - Ensure pool event `backPressure` is emitted.
452 - Ensure pool event `full` is emitted only once.
453 - Ensure worker node cannot be instantiated without proper arguments.
455 ## [2.6.29] - 2023-08-18
459 - Fix race condition between readiness and task functions worker message handling at startup.
460 - Fix duplicate task function worker usage statistics computation per task function.
461 - Update task function worker usage statistics if and only if there's at least two different task functions.
462 - Fix race condition at task function worker usage executing task computation leading to negative value.
466 - 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).
467 - Use back pressure detection in worker choice strategies.
468 - Add worker choice strategies retries mechanism if no worker is eligible.
470 ## [2.6.28] - 2023-08-16
474 - Ensure pool workers are properly initialized.
478 - HTTP server pool examples: express-cluster, express-hybrid.
482 - Remove now useless branching in worker hot code path.
484 ## [2.6.27] - 2023-08-15
488 - Add `KillHandler` type definition to exported types.
492 - Add `destroy` event to pool API.
494 ## [2.6.26] - 2023-08-15
498 - Add kill handler to worker options allowing to execute custom code when worker is killed.
499 - Add `listTaskFunctions()` method to pool API.
500 - SMTP client pool example: nodemailer.
502 ## [2.6.25] - 2023-08-13
506 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
507 - WebSocket server pool examples: ws-cluster, ws-hybrid.
509 ## [2.6.24] - 2023-08-12
513 - Add array of transferable objects to the `execute()` method arguments.
514 - WebSocket server pool examples: ws-worker_threads.
516 ## [2.6.23] - 2023-08-11
520 - 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.
524 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
525 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
527 ## [2.6.22] - 2023-08-10
531 - Add missing `types` field to package.json `exports`.
535 - Structure markdown documentation (PR #811).
537 ## [2.6.21] - 2023-08-03
541 - Improve code documentation.
542 - Code refactoring and cleanup for better maintainability and readability.
544 ## [2.6.20] - 2023-07-21
548 - Fix queued tasks redistribution on error task execution starvation.
549 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
553 - Drastically reduce lookups by worker in the worker nodes.
555 ## [2.6.19] - 2023-07-20
559 - Dedicated internal communication channel for worker_threads pools.
561 ## [2.6.18] - 2023-07-19
565 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
567 ## [2.6.17] - 2023-07-16
571 - Add `listTaskFunctions()` method to worker API.
573 ## [2.6.16] - 2023-07-12
577 - Fix pool startup detection.
578 - Fix worker task functions handling.
580 ## [2.6.15] - 2023-07-11
584 - Take into account worker node readiness in worker choice strategies.
586 ## [2.6.14] - 2023-07-10
590 - Fix task function statistics tracking.
592 ## [2.6.13] - 2023-07-10
596 - Add per task function statistics tracking.
597 - Add public methods to manipulate the worker task functions at runtime.
599 ## [2.6.12] - 2023-07-09
603 - Workaround import issue with `node:os` module in node 16.x.x.
605 ## [2.6.11] - 2023-07-09
609 - Fix pool readiness semantic.
611 ## [2.6.10] - 2023-07-08
615 - Ensure workers are not recreated on error at pool startup.
619 - Add `ready` and `strategy` fields to pool information.
620 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
621 - Add dynamic pool sizing checks.
623 ## [2.6.9] - 2023-07-07
627 - Recreate the right worker type on uncaught exception.
631 - Add minimum and maximum to internal measurement statistics.
632 - Add `runTime` and `waitTime` to pool information.
633 - Check worker inactive time only on dynamic worker.
635 ## [2.6.8] - 2023-07-03
639 - Brown paper bag release to fix version handling in pool information.
641 ## [2.6.7] - 2023-07-03
645 - Ensure worker queued tasks at error are reassigned to other pool workers.
649 - Add pool `utilization` ratio to pool information.
650 - Add `version` to pool information.
651 - Add worker information to worker nodes.
653 ## [2.6.6] - 2023-07-01
657 - Add safe helper `availableParallelism()` to help sizing the pool.
661 - Ensure message handler is only registered in worker.
663 ## [2.6.5] - 2023-06-27
667 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
671 - Artificial version bump to 2.6.5 to workaround publication issue.
672 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
673 - Ensure pool event is emitted before task error promise rejection.
674 - Fix queued tasks count computation.
678 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
680 ## [2.6.4] - 2023-06-27
684 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
688 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
689 - Ensure pool event is emitted before task error promise rejection.
690 - Fix queued tasks count computation.
694 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
696 ## [2.6.3] - 2023-06-19
700 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
701 - Update strategies internals after statistics computation.
705 - Optimize O(1) queue implementation.
707 ## [2.6.2] - 2023-06-12
711 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
713 ## [2.6.1] - 2023-06-10
717 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
721 - Fix average statistics computation: ensure failed tasks are not accounted.
723 ## [2.6.0] - 2023-06-09
727 - Add `LEAST_ELU` worker choice strategy (experimental).
728 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
732 - Refactor pool worker node usage internals.
733 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
734 - Breaking change: pool information `info` property object fields have been renamed.
738 - Fix wait time accounting.
739 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
740 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
742 ## [2.5.4] - 2023-06-07
746 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
750 - Compute statistics at the worker level only if needed.
751 - Add `worker_threads` options to thread pool options.
755 - Make the `LEAST_BUSY` strategy only relies on task runtime.
757 ## [2.5.3] - 2023-06-04
761 - Refine pool information content.
762 - Limit pool internals public exposure.
764 ## [2.5.2] - 2023-06-02
768 - Add `taskError` pool event for task execution error.
769 - Add pool information `info` property to pool.
770 - Emit pool information on `busy` and `full` pool events.
772 ## [2.5.1] - 2023-06-01
776 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
777 - Add `error` pool event for uncaught worker error.
779 ## [2.5.0] - 2023-05-31
783 - Switch pool event emitter to `EventEmitterAsyncResource`.
784 - Add tasks wait time accounting in per worker tasks usage.
785 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
789 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
791 ## [2.4.14] - 2023-05-09
795 - Ensure no undefined task runtime can land in the tasks history.
796 - Fix median computation implementation once again.
800 - Unit tests for median and queue implementations.
802 ## [2.4.13] - 2023-05-08
806 - Fix worker choice strategy options validation.
807 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
809 ## [2.4.12] - 2023-05-06
813 - Support multiple task functions per worker.
814 - Add custom worker weights support to worker choice strategies options.
818 - Use O(1) queue implementation for tasks queueing.
822 - Fix median computation implementation.
823 - Fix fair share worker choice strategy internals update.
825 ## [2.4.11] - 2023-04-23
829 - Optimize free worker finding in worker choice strategies.
831 ## [2.4.10] - 2023-04-15
835 - Fix typescript type definition for task function: ensure the input data is optional.
836 - Fix typescript type definition for pool execute(): ensure the input data is optional.
838 ## [2.4.9] - 2023-04-15
842 - Add tasks queue enablement runtime setter to pool.
843 - Add tasks queue options runtime setter to pool.
844 - Add worker choice strategy options runtime setter to pool.
848 - Remove the tasks queuing experimental status.
852 - Fix task function type definition and validation.
853 - Fix worker choice strategy options handling.
855 ## [2.4.8] - 2023-04-12
859 - Fix message between main worker and worker type definition for tasks.
860 - Fix code documentation.
862 ## [2.4.7] - 2023-04-11
866 - Add worker tasks queue options to pool options.
870 - Fix missing documentation.
872 ## [2.4.6] - 2023-04-10
876 - Ensure one task at a time is executed per worker with tasks queueing enabled.
877 - Properly count worker executing tasks with tasks queueing enabled.
879 ## [2.4.5] - 2023-04-09
883 - Use monotonic high resolution timer for worker tasks runtime.
884 - Add worker tasks median runtime to statistics.
885 - Add worker tasks queue (experimental).
887 ## [2.4.4] - 2023-04-07
891 - Add `PoolEvents` enumeration and `PoolEvent` type.
895 - Destroy worker only on alive check.
897 ## [2.4.3] - 2023-04-07
901 - Fix typedoc generation with inheritance.
903 ## [2.4.2] - 2023-04-06
907 - Add `full` event to dynamic pool.
908 - Keep worker choice strategy in memory for conditional reuse.
912 - Fix possible negative worker key at worker removal in worker choice strategies.
914 ## [2.4.1] - 2023-04-05
918 - Optimize worker choice strategy for dynamic pool.
922 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
924 ## [2.4.0] - 2023-04-04
928 - Add `LESS_BUSY` worker choice strategy.
932 - Optimize worker storage in pool.
933 - Optimize worker alive status check.
934 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
935 - Optimize `LESS_USED` worker choice strategy.
936 - Update benchmark versus external threads pools.
937 - Optimize tasks usage statistics requirements for worker choice strategy.
941 - Ensure trimmable characters are checked at pool initialization.
942 - Fix message id integer overflow.
943 - Fix pool worker removal in worker choice strategy internals.
944 - Fix package publication with pnpm.
946 ## [2.4.0-3] - 2023-04-04
950 - Add `LESS_BUSY` worker choice strategy.
954 - Optimize worker storage in pool.
955 - Optimize worker alive status check.
956 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
957 - Optimize `LESS_USED` worker choice strategy.
958 - Update benchmark versus external threads pools.
962 - Ensure trimmable characters are checked at pool initialization.
963 - Fix message id integer overflow.
964 - Fix pool worker removal in worker choice strategy internals.
965 - Fix package publication with pnpm.
967 ## [2.4.0-2] - 2023-04-03
971 - Add `LESS_BUSY` worker choice strategy.
975 - Optimize worker storage in pool.
976 - Optimize worker alive status check.
977 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
978 - Optimize `LESS_USED` worker choice strategy.
982 - Ensure trimmable characters are checked at pool initialization.
983 - Fix message id integer overflow.
984 - Fix pool worker removal in worker choice strategy internals.
985 - Fix package publication with pnpm.
987 ## [2.4.0-1] - 2023-04-03
991 - Add `LESS_BUSY` worker choice strategy.
995 - Optimize worker storage in pool.
996 - Optimize worker alive status check.
997 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
998 - Optimize `LESS_USED` worker choice strategy.
1002 - Ensure trimmable characters are checked at pool initialization.
1003 - Fix message id integer overflow.
1004 - Fix pool worker removal in worker choice strategy internals.
1006 ## [2.4.0-0] - 2023-04-03
1010 - Add `LESS_BUSY` worker choice strategy.
1014 - Optimize worker storage in pool.
1015 - Optimize worker alive status check.
1016 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1017 - Optimize `LESS_USED` worker choice strategy.
1021 - Ensure trimmable characters are checked at pool initialization.
1022 - Fix message id integer overflow.
1023 - Fix pool worker removal in worker choice strategy internals.
1025 ## [2.3.10] - 2023-03-18
1029 - Fix package.json `exports` syntax for ESM and CommonJS.
1033 - Permit SemVer pre-release publication.
1035 ## [2.3.10-2] - 2023-03-18
1039 - Fix package.json `exports` syntax for ESM and CommonJS.
1041 ## [2.3.10-1] - 2023-03-18
1045 - Permit SemVer pre-release publication.
1047 ## [2.3.10-0] - 2023-03-18
1051 - Fix package.json `exports` syntax for ESM and CommonJS.
1053 ## [2.3.9] - 2023-03-18
1057 - Introduce ESM module support along with CommonJS one.
1061 - Fix brown paper bag bug referencing the same object literal.
1063 ## [2.3.8] - 2023-03-18
1067 - Switch internal benchmarking code to benny.
1068 - Switch to TypeScript 5.x.x.
1069 - Switch rollup bundler plugins to core ones.
1070 - Switch to TSDoc syntax.
1071 - Enforce conventional commits.
1075 - Fix random integer generator.
1076 - Fix worker choice strategy pool type identification at initialization.
1078 ## [2.3.7] - 2022-10-23
1082 - Switch to open collective FOSS project funding platform.
1083 - Switch to ts-standard linter configuration on TypeScript code.
1087 - Fixed missing async on pool execute method.
1088 - Fixed typing in TypeScript example.
1089 - Fixed types in unit tests.
1091 ## [2.3.6] - 2022-10-22
1095 - Cleanup pool attributes and methods.
1096 - Refine error types thrown.
1100 - Fix continuous integration build on windows.
1101 - Fix code coverage reporting by using c8 instead of nyc.
1103 ## [2.3.5] - 2022-10-21
1107 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
1108 - Optimize tasks usage lookup implementation.
1112 - Fix missed pool event emitter type export.
1113 - Fix typedoc documentation generation.
1115 ## [2.3.4] - 2022-10-17
1119 - Fully automate release process with release-it.
1123 - Optimize fair share task scheduling algorithm implementation.
1124 - Update benchmark versus external pools results with latest version.
1126 ## [2.3.3] - 2022-10-15
1130 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
1132 ## [2.3.2] - 2022-10-14
1136 - Optimize fair share worker selection strategy implementation.
1140 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
1142 ## [2.3.1] - 2022-10-13
1146 - Pool worker choice strategies:
1147 - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
1148 - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
1150 ## [2.2.2] - 2022-10-09
1154 - Fixed `README.md` file.
1156 ## [2.2.1] - 2022-10-08
1160 - Dynamic worker choice strategy change at runtime.
1162 ## [2.2.0] - 2022-01-05
1164 ### Breaking Changes
1166 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
1168 ## [2.1.0] - 2021-08-29
1172 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
1174 ### Breaking Changes
1176 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
1177 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
1178 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
1179 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
1181 ## [2.0.2] - 2021-05-12
1185 - Fix `busy` event emission on fixed pool type
1187 ## [2.0.1] - 2021-03-16
1191 - Check if pool options are properly set.
1192 - `busy` event is emitted on all pool types.
1194 ## [2.0.0] - 2021-03-01
1198 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1200 ### Breaking Changes
1202 - `FullPool` event is now renamed to `busy`.
1203 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1204 _Find more details on our JSDoc._
1206 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1208 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1210 ### Pool options types declaration merge
1212 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1214 #### New `export` strategy
1218 const DynamicThreadPool = require('poolifier/lib/dynamic')
1220 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1223 But you should always prefer just using
1226 const { DynamicThreadPool } = require('poolifier')
1229 #### New type definitions for input data and response
1231 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1232 _This is not a limitation by poolifier but Node.js._
1234 #### Public property replacements
1236 `numWorkers` property is now `numberOfWorkers`
1238 #### Internal (protected) properties and methods renaming
1240 These properties are not intended for end users
1242 - `id` => `nextMessageId`
1244 These methods are not intended for end users
1246 - `_chooseWorker` => `chooseWorker`
1247 - `_newWorker` => `createWorker`
1248 - `_execute` => `internalExecute`
1249 - `_chooseWorker` => `chooseWorker`
1250 - `_checkAlive` => `checkAlive`
1252 - `_runAsync` => `runAsync`
1254 ## [1.1.0] - 2020-05-21
1258 - ThreadWorker support async functions as option
1259 - Various external library patches
1261 ## [1.0.0] - 2020-01-24
1265 - FixedThreadPool implementation
1266 - DynamicThreadPool implementation
1267 - WorkerThread implementation to improve developer experience