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 - Add missing type to TS type definitions.
14 ## [3.1.15] - 2024-01-02
18 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
20 ## [3.1.15-0] - 2024-01-02
24 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
26 ## [3.1.14] - 2024-01-01
30 - Properly handle dynamic pool with zero minimum size.
32 ## [3.1.13] - 2023-12-30
36 - Reduce branching in several hot code paths.
37 - Use faster object cloning implementation.
39 ## [3.1.12] - 2023-12-27
43 - Fix tasks redistribution triggers at pool destroying.
47 - Switch TypeScript module resolution to Node16.
49 ## [3.1.12-0] - 2023-12-27
53 - Fix tasks redistribution triggers at pool destroying.
55 ## [3.1.11] - 2023-12-24
59 - Avoid worker node cross tasks stealing.
60 - Ensure only half the pool worker nodes can steal tasks.
62 ## [3.1.10] - 2023-12-23
66 - Avoid useless branching on pool type.
68 ## [3.1.9] - 2023-12-22
72 - Readd ThreadPoolOptions and ClusterPoolOptions TS type aliases to PoolOptions.
74 ## [3.1.8] - 2023-12-21
78 - Fix default worker weight computation.
79 - Fix possible null exception at pool destroying.
81 ## [3.1.7] - 2023-12-20
85 - Ensure worker choice strategies implementation wait for worker node readiness: [#1748](https://github.com/poolifier/poolifier/issues/1748).
87 ## [3.1.6] - 2023-12-18
91 - Fix pool destroying with tasks queuing enabled.
93 ## [3.1.5] - 2023-12-18
97 - Add queued tasks end timeout support to worker node termination.
99 ## [3.1.4] - 2023-12-18
103 - Make more robust the fix for possible null exception at handling task execution response.
105 ## [3.1.3] - 2023-12-17
109 - Fix possible null exception at handling task execution response.
111 ## [3.1.2] - 2023-12-17
115 - Wait for queued tasks to end at worker node termination.
117 ## [3.1.1] - 2023-12-16
121 - Fix pool options TS type definition.
123 ## [3.1.0] - 2023-12-16
127 - TypeScript breaking change: merge ThreadPoolOptions and ClusterPoolOptions types into PoolOptions type.
129 ## [3.0.14] - 2023-12-13
133 - Fix possible null exception with worker_threads pools.
135 ## [3.0.13] - 2023-12-12
139 - Ensure worker choice strategy wait for worker nodes readiness.
143 - Remove infinite retries support in worker choice strategy to avoid configuration leading to possible infinite recursion or loop.
145 ## [3.0.12] - 2023-12-12
149 - Add infinite retries support in worker choice strategy.
151 ## [3.0.11] - 2023-12-11
155 - Ensure pool asynchronous resource properly track tasks execution.
157 ## [3.0.10] - 2023-12-08
161 - Add a fastpath when tasks stealing or redistribution is impossible.
163 ## [3.0.9] - 2023-11-26
167 - Remove all pool events listener at pool destroying.
168 - Remove all worker node events listener at worker node destroying.
169 - Fix worker node event emitter listeners handling memory leak at pool options runtime change.
171 ## [3.0.8] - 2023-11-25
175 - Ensure continuous tasks stealing on idle start at worker node idling.
177 ## [3.0.7] - 2023-11-24
181 - Make continuous tasks stealing start at worker node idling.
183 ## [3.0.6] - 2023-11-24
187 - Ensure pool statuses are checked at initialization, `start()` or `destroy()`.
188 - Ensure pool `ready` event can be emitted after several `start()/destroy()` cycles.
190 ## [3.0.5] - 2023-10-27
194 - Ensure pool `ready` event can be emitted only once.
196 ## [3.0.4] - 2023-10-20
200 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
201 - Use builtin retry mechanism in worker choice strategies instead of custom one.
203 ## [3.0.3] - 2023-10-19
207 - Avoid null exception at sending message to worker.
208 - Avoid null exception at checking worker node readiness.
210 ## [3.0.2] - 2023-10-17
214 - 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).
216 ## [3.0.1] - 2023-10-16
220 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
224 - Switch the worker node eventing code to `EventTarget` API.
226 ## [3.0.0] - 2023-10-08
230 - Remove Node.js 16.x.x (EOL) support.
232 ## [2.7.5] - 2023-10-03
236 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
238 ## [2.7.4] - 2023-09-25
242 - Fix source maps (bundler issue).
244 ## [2.7.3] - 2023-09-24
248 - Convert pool event emitter to event emitter async resource.
250 ## [2.7.2] - 2023-09-23
254 - Add source maps to npm package to ease debugging.
258 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
260 ## [2.7.1] - 2023-09-20
264 - Ensure worker message listener used one time are removed after usage.
266 ## [2.7.0] - 2023-09-19
270 - Fix task stealing related tasks queue options handling at runtime.
274 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
278 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
279 - Stricter worker constructor arguments validation.
281 ## [2.6.45] - 2023-09-17
285 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
289 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
290 - Add `start()` method to pool API to start the minimum number of workers.
291 - 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.
292 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
294 ## [2.6.44] - 2023-09-08
298 - Use a dedicated PAT to publish on GitHub packages registry.
302 - Publish on GitHub packages registry on release.
306 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
308 ## [2.6.43] - 2023-09-08
312 - Publish on GitHub packages registry on release.
316 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
318 ## [2.6.42] - 2023-09-06
322 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
324 ## [2.6.41] - 2023-09-03
328 - Optimize worker choice strategies implementation.
330 ## [2.6.40] - 2023-09-01
334 - Do not pre-choose in WRR worker choice strategy to avoid bias.
335 - Avoid array out of bound in worker choice strategies after worker node removal.
337 ## [2.6.39] - 2023-08-30
341 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
343 ## [2.6.38] - 2023-08-30
347 - Bundle typescript types declaration into one file.
351 - Improve interleaved weighted round robin worker choice strategy implementation.
353 ## [2.6.37] - 2023-08-28
357 - Ensure unused worker usage statistics are deleted at runtime.
361 - Rename worker choice strategy options `choiceRetries` to `retries`.
362 - Avoid unnecessary branching in worker choice strategies.
364 ## [2.6.36] - 2023-08-27
368 - Fix pool `execute()` arguments check.
372 - Make continuous tasks stealing algorithm less aggressive.
373 - Fine tune tasks stealing algorithm under back pressure.
375 ## [2.6.35] - 2023-08-25
379 - Don't account worker usage statistics for tasks that have failed.
380 - Fix pool information runtime and wait time median computation.
384 - Update simple moving average implementation to use a circular buffer.
385 - Update simple moving median implementation to use a circular buffer.
386 - Account for stolen tasks in worker usage statistics and pool information.
390 - Continuous tasks stealing algorithm.
392 ## [2.6.34] - 2023-08-24
396 - Avoid cascading tasks stealing under back pressure.
400 - Add fastpath to queued tasks rescheduling.
402 ## [2.6.33] - 2023-08-24
406 - Fix queued tasks rescheduling.
410 - Rename tasks queue options `queueMaxSize` to `size`.
414 - Task stealing scheduling algorithm if tasks queueing is enabled.
416 ## [2.6.32] - 2023-08-23
420 - Ensure no task can be executed when the pool is destroyed.
424 - Add `queueMaxSize` option to tasks queue options.
425 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
426 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
428 ## [2.6.31] - 2023-08-20
432 - Fix worker choice strategy retries mechanism in some edge cases.
436 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
437 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
439 ## [2.6.30] - 2023-08-19
443 - Ensure pool event `backPressure` is emitted.
444 - Ensure pool event `full` is emitted only once.
445 - Ensure worker node cannot be instantiated without proper arguments.
447 ## [2.6.29] - 2023-08-18
451 - Fix race condition between readiness and task functions worker message handling at startup.
452 - Fix duplicate task function worker usage statistics computation per task function.
453 - Update task function worker usage statistics if and only if there's at least two different task functions.
454 - Fix race condition at task function worker usage executing task computation leading to negative value.
458 - 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).
459 - Use back pressure detection in worker choice strategies.
460 - Add worker choice strategies retries mechanism if no worker is eligible.
462 ## [2.6.28] - 2023-08-16
466 - Ensure pool workers are properly initialized.
470 - HTTP server pool examples: express-cluster, express-hybrid.
474 - Remove now useless branching in worker hot code path.
476 ## [2.6.27] - 2023-08-15
480 - Add `KillHandler` type definition to exported types.
484 - Add `destroy` event to pool API.
486 ## [2.6.26] - 2023-08-15
490 - Add kill handler to worker options allowing to execute custom code when worker is killed.
491 - Add `listTaskFunctions()` method to pool API.
492 - SMTP client pool example: nodemailer.
494 ## [2.6.25] - 2023-08-13
498 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
499 - WebSocket server pool examples: ws-cluster, ws-hybrid.
501 ## [2.6.24] - 2023-08-12
505 - Add array of transferable objects to the `execute()` method arguments.
506 - WebSocket server pool examples: ws-worker_threads.
508 ## [2.6.23] - 2023-08-11
512 - 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.
516 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
517 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
519 ## [2.6.22] - 2023-08-10
523 - Add missing `types` field to package.json `exports`.
527 - Structure markdown documentation (PR #811).
529 ## [2.6.21] - 2023-08-03
533 - Improve code documentation.
534 - Code refactoring and cleanup for better maintainability and readability.
536 ## [2.6.20] - 2023-07-21
540 - Fix queued tasks redistribution on error task execution starvation.
541 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
545 - Drastically reduce lookups by worker in the worker nodes.
547 ## [2.6.19] - 2023-07-20
551 - Dedicated internal communication channel for worker_threads pools.
553 ## [2.6.18] - 2023-07-19
557 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
559 ## [2.6.17] - 2023-07-16
563 - Add `listTaskFunctions()` method to worker API.
565 ## [2.6.16] - 2023-07-12
569 - Fix pool startup detection.
570 - Fix worker task functions handling.
572 ## [2.6.15] - 2023-07-11
576 - Take into account worker node readiness in worker choice strategies.
578 ## [2.6.14] - 2023-07-10
582 - Fix task function statistics tracking.
584 ## [2.6.13] - 2023-07-10
588 - Add per task function statistics tracking.
589 - Add public methods to manipulate the worker task functions at runtime.
591 ## [2.6.12] - 2023-07-09
595 - Workaround import issue with `node:os` module in node 16.x.x.
597 ## [2.6.11] - 2023-07-09
601 - Fix pool readiness semantic.
603 ## [2.6.10] - 2023-07-08
607 - Ensure workers are not recreated on error at pool startup.
611 - Add `ready` and `strategy` fields to pool information.
612 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
613 - Add dynamic pool sizing checks.
615 ## [2.6.9] - 2023-07-07
619 - Recreate the right worker type on uncaught exception.
623 - Add minimum and maximum to internal measurement statistics.
624 - Add `runTime` and `waitTime` to pool information.
625 - Check worker inactive time only on dynamic worker.
627 ## [2.6.8] - 2023-07-03
631 - Brown paper bag release to fix version handling in pool information.
633 ## [2.6.7] - 2023-07-03
637 - Ensure worker queued tasks at error are reassigned to other pool workers.
641 - Add pool `utilization` ratio to pool information.
642 - Add `version` to pool information.
643 - Add worker information to worker nodes.
645 ## [2.6.6] - 2023-07-01
649 - Add safe helper `availableParallelism()` to help sizing the pool.
653 - Ensure message handler is only registered in worker.
655 ## [2.6.5] - 2023-06-27
659 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
663 - Artificial version bump to 2.6.5 to workaround publication issue.
664 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
665 - Ensure pool event is emitted before task error promise rejection.
666 - Fix queued tasks count computation.
670 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
672 ## [2.6.4] - 2023-06-27
676 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
680 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
681 - Ensure pool event is emitted before task error promise rejection.
682 - Fix queued tasks count computation.
686 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
688 ## [2.6.3] - 2023-06-19
692 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
693 - Update strategies internals after statistics computation.
697 - Optimize O(1) queue implementation.
699 ## [2.6.2] - 2023-06-12
703 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
705 ## [2.6.1] - 2023-06-10
709 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
713 - Fix average statistics computation: ensure failed tasks are not accounted.
715 ## [2.6.0] - 2023-06-09
719 - Add `LEAST_ELU` worker choice strategy (experimental).
720 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
724 - Refactor pool worker node usage internals.
725 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
726 - Breaking change: pool information `info` property object fields have been renamed.
730 - Fix wait time accounting.
731 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
732 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
734 ## [2.5.4] - 2023-06-07
738 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
742 - Compute statistics at the worker level only if needed.
743 - Add `worker_threads` options to thread pool options.
747 - Make the `LEAST_BUSY` strategy only relies on task runtime.
749 ## [2.5.3] - 2023-06-04
753 - Refine pool information content.
754 - Limit pool internals public exposure.
756 ## [2.5.2] - 2023-06-02
760 - Add `taskError` pool event for task execution error.
761 - Add pool information `info` property to pool.
762 - Emit pool information on `busy` and `full` pool events.
764 ## [2.5.1] - 2023-06-01
768 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
769 - Add `error` pool event for uncaught worker error.
771 ## [2.5.0] - 2023-05-31
775 - Switch pool event emitter to `EventEmitterAsyncResource`.
776 - Add tasks wait time accounting in per worker tasks usage.
777 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
781 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
783 ## [2.4.14] - 2023-05-09
787 - Ensure no undefined task runtime can land in the tasks history.
788 - Fix median computation implementation once again.
792 - Unit tests for median and queue implementations.
794 ## [2.4.13] - 2023-05-08
798 - Fix worker choice strategy options validation.
799 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
801 ## [2.4.12] - 2023-05-06
805 - Support multiple task functions per worker.
806 - Add custom worker weights support to worker choice strategies options.
810 - Use O(1) queue implementation for tasks queueing.
814 - Fix median computation implementation.
815 - Fix fair share worker choice strategy internals update.
817 ## [2.4.11] - 2023-04-23
821 - Optimize free worker finding in worker choice strategies.
823 ## [2.4.10] - 2023-04-15
827 - Fix typescript type definition for task function: ensure the input data is optional.
828 - Fix typescript type definition for pool execute(): ensure the input data is optional.
830 ## [2.4.9] - 2023-04-15
834 - Add tasks queue enablement runtime setter to pool.
835 - Add tasks queue options runtime setter to pool.
836 - Add worker choice strategy options runtime setter to pool.
840 - Remove the tasks queuing experimental status.
844 - Fix task function type definition and validation.
845 - Fix worker choice strategy options handling.
847 ## [2.4.8] - 2023-04-12
851 - Fix message between main worker and worker type definition for tasks.
852 - Fix code documentation.
854 ## [2.4.7] - 2023-04-11
858 - Add worker tasks queue options to pool options.
862 - Fix missing documentation.
864 ## [2.4.6] - 2023-04-10
868 - Ensure one task at a time is executed per worker with tasks queueing enabled.
869 - Properly count worker executing tasks with tasks queueing enabled.
871 ## [2.4.5] - 2023-04-09
875 - Use monotonic high resolution timer for worker tasks runtime.
876 - Add worker tasks median runtime to statistics.
877 - Add worker tasks queue (experimental).
879 ## [2.4.4] - 2023-04-07
883 - Add `PoolEvents` enumeration and `PoolEvent` type.
887 - Destroy worker only on alive check.
889 ## [2.4.3] - 2023-04-07
893 - Fix typedoc generation with inheritance.
895 ## [2.4.2] - 2023-04-06
899 - Add `full` event to dynamic pool.
900 - Keep worker choice strategy in memory for conditional reuse.
904 - Fix possible negative worker key at worker removal in worker choice strategies.
906 ## [2.4.1] - 2023-04-05
910 - Optimize worker choice strategy for dynamic pool.
914 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
916 ## [2.4.0] - 2023-04-04
920 - Add `LESS_BUSY` worker choice strategy.
924 - Optimize worker storage in pool.
925 - Optimize worker alive status check.
926 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
927 - Optimize `LESS_USED` worker choice strategy.
928 - Update benchmark versus external threads pools.
929 - Optimize tasks usage statistics requirements for worker choice strategy.
933 - Ensure trimmable characters are checked at pool initialization.
934 - Fix message id integer overflow.
935 - Fix pool worker removal in worker choice strategy internals.
936 - Fix package publication with pnpm.
938 ## [2.4.0-3] - 2023-04-04
942 - Add `LESS_BUSY` worker choice strategy.
946 - Optimize worker storage in pool.
947 - Optimize worker alive status check.
948 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
949 - Optimize `LESS_USED` worker choice strategy.
950 - Update benchmark versus external threads pools.
954 - Ensure trimmable characters are checked at pool initialization.
955 - Fix message id integer overflow.
956 - Fix pool worker removal in worker choice strategy internals.
957 - Fix package publication with pnpm.
959 ## [2.4.0-2] - 2023-04-03
963 - Add `LESS_BUSY` worker choice strategy.
967 - Optimize worker storage in pool.
968 - Optimize worker alive status check.
969 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
970 - Optimize `LESS_USED` worker choice strategy.
974 - Ensure trimmable characters are checked at pool initialization.
975 - Fix message id integer overflow.
976 - Fix pool worker removal in worker choice strategy internals.
977 - Fix package publication with pnpm.
979 ## [2.4.0-1] - 2023-04-03
983 - Add `LESS_BUSY` worker choice strategy.
987 - Optimize worker storage in pool.
988 - Optimize worker alive status check.
989 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
990 - Optimize `LESS_USED` worker choice strategy.
994 - Ensure trimmable characters are checked at pool initialization.
995 - Fix message id integer overflow.
996 - Fix pool worker removal in worker choice strategy internals.
998 ## [2.4.0-0] - 2023-04-03
1002 - Add `LESS_BUSY` worker choice strategy.
1006 - Optimize worker storage in pool.
1007 - Optimize worker alive status check.
1008 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1009 - Optimize `LESS_USED` worker choice strategy.
1013 - Ensure trimmable characters are checked at pool initialization.
1014 - Fix message id integer overflow.
1015 - Fix pool worker removal in worker choice strategy internals.
1017 ## [2.3.10] - 2023-03-18
1021 - Fix package.json `exports` syntax for ESM and CommonJS.
1025 - Permit SemVer pre-release publication.
1027 ## [2.3.10-2] - 2023-03-18
1031 - Fix package.json `exports` syntax for ESM and CommonJS.
1033 ## [2.3.10-1] - 2023-03-18
1037 - Permit SemVer pre-release publication.
1039 ## [2.3.10-0] - 2023-03-18
1043 - Fix package.json `exports` syntax for ESM and CommonJS.
1045 ## [2.3.9] - 2023-03-18
1049 - Introduce ESM module support along with CommonJS one.
1053 - Fix brown paper bag bug referencing the same object literal.
1055 ## [2.3.8] - 2023-03-18
1059 - Switch internal benchmarking code to benny.
1060 - Switch to TypeScript 5.x.x.
1061 - Switch rollup bundler plugins to core ones.
1062 - Switch to TSDoc syntax.
1063 - Enforce conventional commits.
1067 - Fix random integer generator.
1068 - Fix worker choice strategy pool type identification at initialization.
1070 ## [2.3.7] - 2022-10-23
1074 - Switch to open collective FOSS project funding platform.
1075 - Switch to ts-standard linter configuration on TypeScript code.
1079 - Fixed missing async on pool execute method.
1080 - Fixed typing in TypeScript example.
1081 - Fixed types in unit tests.
1083 ## [2.3.6] - 2022-10-22
1087 - Cleanup pool attributes and methods.
1088 - Refine error types thrown.
1092 - Fix continuous integration build on windows.
1093 - Fix code coverage reporting by using c8 instead of nyc.
1095 ## [2.3.5] - 2022-10-21
1099 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
1100 - Optimize tasks usage lookup implementation.
1104 - Fix missed pool event emitter type export.
1105 - Fix typedoc documentation generation.
1107 ## [2.3.4] - 2022-10-17
1111 - Fully automate release process with release-it.
1115 - Optimize fair share task scheduling algorithm implementation.
1116 - Update benchmark versus external pools results with latest version.
1118 ## [2.3.3] - 2022-10-15
1122 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
1124 ## [2.3.2] - 2022-10-14
1128 - Optimize fair share worker selection strategy implementation.
1132 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
1134 ## [2.3.1] - 2022-10-13
1138 - Pool worker choice strategies:
1139 - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
1140 - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
1142 ## [2.2.2] - 2022-10-09
1146 - Fixed `README.md` file.
1148 ## [2.2.1] - 2022-10-08
1152 - Dynamic worker choice strategy change at runtime.
1154 ## [2.2.0] - 2022-01-05
1156 ### Breaking Changes
1158 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
1160 ## [2.1.0] - 2021-08-29
1164 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
1166 ### Breaking Changes
1168 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
1169 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
1170 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
1171 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
1173 ## [2.0.2] - 2021-05-12
1177 - Fix `busy` event emission on fixed pool type
1179 ## [2.0.1] - 2021-03-16
1183 - Check if pool options are properly set.
1184 - `busy` event is emitted on all pool types.
1186 ## [2.0.0] - 2021-03-01
1190 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1192 ### Breaking Changes
1194 - `FullPool` event is now renamed to `busy`.
1195 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1196 _Find more details on our JSDoc._
1198 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1200 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1202 ### Pool options types declaration merge
1204 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1206 #### New `export` strategy
1210 const DynamicThreadPool = require('poolifier/lib/dynamic')
1212 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1215 But you should always prefer just using
1218 const { DynamicThreadPool } = require('poolifier')
1221 #### New type definitions for input data and response
1223 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1224 _This is not a limitation by poolifier but Node.js._
1226 #### Public property replacements
1228 `numWorkers` property is now `numberOfWorkers`
1230 #### Internal (protected) properties and methods renaming
1232 These properties are not intended for end users
1234 - `id` => `nextMessageId`
1236 These methods are not intended for end users
1238 - `_chooseWorker` => `chooseWorker`
1239 - `_newWorker` => `createWorker`
1240 - `_execute` => `internalExecute`
1241 - `_chooseWorker` => `chooseWorker`
1242 - `_checkAlive` => `checkAlive`
1244 - `_runAsync` => `runAsync`
1246 ## [1.1.0] - 2020-05-21
1250 - ThreadWorker support async functions as option
1251 - Various external library patches
1253 ## [1.0.0] - 2020-01-24
1257 - FixedThreadPool implementation
1258 - DynamicThreadPool implementation
1259 - WorkerThread implementation to improve developer experience