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 ## [3.1.15-0] - 2024-01-02
14 - Fix CommonJS support with TypeScript.
16 ## [3.1.14] - 2024-01-01
20 - Properly handle dynamic pool with zero minimum size.
22 ## [3.1.13] - 2023-12-30
26 - Reduce branching in several hot code paths.
27 - Use faster object cloning implementation.
29 ## [3.1.12] - 2023-12-27
33 - Fix tasks redistribution triggers at pool destroying.
37 - Switch TypeScript module resolution to Node16.
39 ## [3.1.12-0] - 2023-12-27
43 - Fix tasks redistribution triggers at pool destroying.
45 ## [3.1.11] - 2023-12-24
49 - Avoid worker node cross tasks stealing.
50 - Ensure only half the pool worker nodes can steal tasks.
52 ## [3.1.10] - 2023-12-23
56 - Avoid useless branching on pool type.
58 ## [3.1.9] - 2023-12-22
62 - Readd ThreadPoolOptions and ClusterPoolOptions TS type aliases to PoolOptions.
64 ## [3.1.8] - 2023-12-21
68 - Fix default worker weight computation.
69 - Fix possible null exception at pool destroying.
71 ## [3.1.7] - 2023-12-20
75 - Ensure worker choice strategies implementation wait for worker node readiness: [#1748](https://github.com/poolifier/poolifier/issues/1748).
77 ## [3.1.6] - 2023-12-18
81 - Fix pool destroying with tasks queuing enabled.
83 ## [3.1.5] - 2023-12-18
87 - Add queued tasks end timeout support to worker node termination.
89 ## [3.1.4] - 2023-12-18
93 - Make more robust the fix for possible null exception at handling task execution response.
95 ## [3.1.3] - 2023-12-17
99 - Fix possible null exception at handling task execution response.
101 ## [3.1.2] - 2023-12-17
105 - Wait for queued tasks to end at worker node termination.
107 ## [3.1.1] - 2023-12-16
111 - Fix pool options TS type definition.
113 ## [3.1.0] - 2023-12-16
117 - TypeScript breaking change: merge ThreadPoolOptions and ClusterPoolOptions types into PoolOptions type.
119 ## [3.0.14] - 2023-12-13
123 - Fix possible null exception with worker_threads pools.
125 ## [3.0.13] - 2023-12-12
129 - Ensure worker choice strategy wait for worker nodes readiness.
133 - Remove infinite retries support in worker choice strategy to avoid configuration leading to possible infinite recursion or loop.
135 ## [3.0.12] - 2023-12-12
139 - Add infinite retries support in worker choice strategy.
141 ## [3.0.11] - 2023-12-11
145 - Ensure pool asynchronous resource properly track tasks execution.
147 ## [3.0.10] - 2023-12-08
151 - Add a fastpath when tasks stealing or redistribution is impossible.
153 ## [3.0.9] - 2023-11-26
157 - Remove all pool events listener at pool destroying.
158 - Remove all worker node events listener at worker node destroying.
159 - Fix worker node event emitter listeners handling memory leak at pool options runtime change.
161 ## [3.0.8] - 2023-11-25
165 - Ensure continuous tasks stealing on idle start at worker node idling.
167 ## [3.0.7] - 2023-11-24
171 - Make continuous tasks stealing start at worker node idling.
173 ## [3.0.6] - 2023-11-24
177 - Ensure pool statuses are checked at initialization, `start()` or `destroy()`.
178 - Ensure pool `ready` event can be emitted after several `start()/destroy()` cycles.
180 ## [3.0.5] - 2023-10-27
184 - Ensure pool `ready` event can be emitted only once.
186 ## [3.0.4] - 2023-10-20
190 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
191 - Use builtin retry mechanism in worker choice strategies instead of custom one.
193 ## [3.0.3] - 2023-10-19
197 - Avoid null exception at sending message to worker.
198 - Avoid null exception at checking worker node readiness.
200 ## [3.0.2] - 2023-10-17
204 - 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).
206 ## [3.0.1] - 2023-10-16
210 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
214 - Switch the worker node eventing code to `EventTarget` API.
216 ## [3.0.0] - 2023-10-08
220 - Remove Node.js 16.x.x (EOL) support.
222 ## [2.7.5] - 2023-10-03
226 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
228 ## [2.7.4] - 2023-09-25
232 - Fix source maps (bundler issue).
234 ## [2.7.3] - 2023-09-24
238 - Convert pool event emitter to event emitter async resource.
240 ## [2.7.2] - 2023-09-23
244 - Add source maps to npm package to ease debugging.
248 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
250 ## [2.7.1] - 2023-09-20
254 - Ensure worker message listener used one time are removed after usage.
256 ## [2.7.0] - 2023-09-19
260 - Fix task stealing related tasks queue options handling at runtime.
264 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
268 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
269 - Stricter worker constructor arguments validation.
271 ## [2.6.45] - 2023-09-17
275 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
279 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
280 - Add `start()` method to pool API to start the minimum number of workers.
281 - 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.
282 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
284 ## [2.6.44] - 2023-09-08
288 - Use a dedicated PAT to publish on GitHub packages registry.
292 - Publish on GitHub packages registry on release.
296 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
298 ## [2.6.43] - 2023-09-08
302 - Publish on GitHub packages registry on release.
306 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
308 ## [2.6.42] - 2023-09-06
312 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
314 ## [2.6.41] - 2023-09-03
318 - Optimize worker choice strategies implementation.
320 ## [2.6.40] - 2023-09-01
324 - Do not pre-choose in WRR worker choice strategy to avoid bias.
325 - Avoid array out of bound in worker choice strategies after worker node removal.
327 ## [2.6.39] - 2023-08-30
331 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
333 ## [2.6.38] - 2023-08-30
337 - Bundle typescript types declaration into one file.
341 - Improve interleaved weighted round robin worker choice strategy implementation.
343 ## [2.6.37] - 2023-08-28
347 - Ensure unused worker usage statistics are deleted at runtime.
351 - Rename worker choice strategy options `choiceRetries` to `retries`.
352 - Avoid unnecessary branching in worker choice strategies.
354 ## [2.6.36] - 2023-08-27
358 - Fix pool `execute()` arguments check.
362 - Make continuous tasks stealing algorithm less aggressive.
363 - Fine tune tasks stealing algorithm under back pressure.
365 ## [2.6.35] - 2023-08-25
369 - Don't account worker usage statistics for tasks that have failed.
370 - Fix pool information runtime and wait time median computation.
374 - Update simple moving average implementation to use a circular buffer.
375 - Update simple moving median implementation to use a circular buffer.
376 - Account for stolen tasks in worker usage statistics and pool information.
380 - Continuous tasks stealing algorithm.
382 ## [2.6.34] - 2023-08-24
386 - Avoid cascading tasks stealing under back pressure.
390 - Add fastpath to queued tasks rescheduling.
392 ## [2.6.33] - 2023-08-24
396 - Fix queued tasks rescheduling.
400 - Rename tasks queue options `queueMaxSize` to `size`.
404 - Task stealing scheduling algorithm if tasks queueing is enabled.
406 ## [2.6.32] - 2023-08-23
410 - Ensure no task can be executed when the pool is destroyed.
414 - Add `queueMaxSize` option to tasks queue options.
415 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
416 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
418 ## [2.6.31] - 2023-08-20
422 - Fix worker choice strategy retries mechanism in some edge cases.
426 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
427 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
429 ## [2.6.30] - 2023-08-19
433 - Ensure pool event `backPressure` is emitted.
434 - Ensure pool event `full` is emitted only once.
435 - Ensure worker node cannot be instantiated without proper arguments.
437 ## [2.6.29] - 2023-08-18
441 - Fix race condition between readiness and task functions worker message handling at startup.
442 - Fix duplicate task function worker usage statistics computation per task function.
443 - Update task function worker usage statistics if and only if there's at least two different task functions.
444 - Fix race condition at task function worker usage executing task computation leading to negative value.
448 - 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).
449 - Use back pressure detection in worker choice strategies.
450 - Add worker choice strategies retries mechanism if no worker is eligible.
452 ## [2.6.28] - 2023-08-16
456 - Ensure pool workers are properly initialized.
460 - HTTP server pool examples: express-cluster, express-hybrid.
464 - Remove now useless branching in worker hot code path.
466 ## [2.6.27] - 2023-08-15
470 - Add `KillHandler` type definition to exported types.
474 - Add `destroy` event to pool API.
476 ## [2.6.26] - 2023-08-15
480 - Add kill handler to worker options allowing to execute custom code when worker is killed.
481 - Add `listTaskFunctions()` method to pool API.
482 - SMTP client pool example: nodemailer.
484 ## [2.6.25] - 2023-08-13
488 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
489 - WebSocket server pool examples: ws-cluster, ws-hybrid.
491 ## [2.6.24] - 2023-08-12
495 - Add array of transferable objects to the `execute()` method arguments.
496 - WebSocket server pool examples: ws-worker_threads.
498 ## [2.6.23] - 2023-08-11
502 - 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.
506 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
507 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
509 ## [2.6.22] - 2023-08-10
513 - Add missing `types` field to package.json `exports`.
517 - Structure markdown documentation (PR #811).
519 ## [2.6.21] - 2023-08-03
523 - Improve code documentation.
524 - Code refactoring and cleanup for better maintainability and readability.
526 ## [2.6.20] - 2023-07-21
530 - Fix queued tasks redistribution on error task execution starvation.
531 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
535 - Drastically reduce lookups by worker in the worker nodes.
537 ## [2.6.19] - 2023-07-20
541 - Dedicated internal communication channel for worker_threads pools.
543 ## [2.6.18] - 2023-07-19
547 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
549 ## [2.6.17] - 2023-07-16
553 - Add `listTaskFunctions()` method to worker API.
555 ## [2.6.16] - 2023-07-12
559 - Fix pool startup detection.
560 - Fix worker task functions handling.
562 ## [2.6.15] - 2023-07-11
566 - Take into account worker node readiness in worker choice strategies.
568 ## [2.6.14] - 2023-07-10
572 - Fix task function statistics tracking.
574 ## [2.6.13] - 2023-07-10
578 - Add per task function statistics tracking.
579 - Add public methods to manipulate the worker task functions at runtime.
581 ## [2.6.12] - 2023-07-09
585 - Workaround import issue with `node:os` module in node 16.x.x.
587 ## [2.6.11] - 2023-07-09
591 - Fix pool readiness semantic.
593 ## [2.6.10] - 2023-07-08
597 - Ensure workers are not recreated on error at pool startup.
601 - Add `ready` and `strategy` fields to pool information.
602 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
603 - Add dynamic pool sizing checks.
605 ## [2.6.9] - 2023-07-07
609 - Recreate the right worker type on uncaught exception.
613 - Add minimum and maximum to internal measurement statistics.
614 - Add `runTime` and `waitTime` to pool information.
615 - Check worker inactive time only on dynamic worker.
617 ## [2.6.8] - 2023-07-03
621 - Brown paper bag release to fix version handling in pool information.
623 ## [2.6.7] - 2023-07-03
627 - Ensure worker queued tasks at error are reassigned to other pool workers.
631 - Add pool `utilization` ratio to pool information.
632 - Add `version` to pool information.
633 - Add worker information to worker nodes.
635 ## [2.6.6] - 2023-07-01
639 - Add safe helper `availableParallelism()` to help sizing the pool.
643 - Ensure message handler is only registered in worker.
645 ## [2.6.5] - 2023-06-27
649 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
653 - Artificial version bump to 2.6.5 to workaround publication issue.
654 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
655 - Ensure pool event is emitted before task error promise rejection.
656 - Fix queued tasks count computation.
660 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
662 ## [2.6.4] - 2023-06-27
666 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
670 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
671 - Ensure pool event is emitted before task error promise rejection.
672 - Fix queued tasks count computation.
676 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
678 ## [2.6.3] - 2023-06-19
682 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
683 - Update strategies internals after statistics computation.
687 - Optimize O(1) queue implementation.
689 ## [2.6.2] - 2023-06-12
693 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
695 ## [2.6.1] - 2023-06-10
699 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
703 - Fix average statistics computation: ensure failed tasks are not accounted.
705 ## [2.6.0] - 2023-06-09
709 - Add `LEAST_ELU` worker choice strategy (experimental).
710 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
714 - Refactor pool worker node usage internals.
715 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
716 - Breaking change: pool information `info` property object fields have been renamed.
720 - Fix wait time accounting.
721 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
722 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
724 ## [2.5.4] - 2023-06-07
728 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
732 - Compute statistics at the worker level only if needed.
733 - Add `worker_threads` options to thread pool options.
737 - Make the `LEAST_BUSY` strategy only relies on task runtime.
739 ## [2.5.3] - 2023-06-04
743 - Refine pool information content.
744 - Limit pool internals public exposure.
746 ## [2.5.2] - 2023-06-02
750 - Add `taskError` pool event for task execution error.
751 - Add pool information `info` property to pool.
752 - Emit pool information on `busy` and `full` pool events.
754 ## [2.5.1] - 2023-06-01
758 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
759 - Add `error` pool event for uncaught worker error.
761 ## [2.5.0] - 2023-05-31
765 - Switch pool event emitter to `EventEmitterAsyncResource`.
766 - Add tasks wait time accounting in per worker tasks usage.
767 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
771 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
773 ## [2.4.14] - 2023-05-09
777 - Ensure no undefined task runtime can land in the tasks history.
778 - Fix median computation implementation once again.
782 - Unit tests for median and queue implementations.
784 ## [2.4.13] - 2023-05-08
788 - Fix worker choice strategy options validation.
789 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
791 ## [2.4.12] - 2023-05-06
795 - Support multiple task functions per worker.
796 - Add custom worker weights support to worker choice strategies options.
800 - Use O(1) queue implementation for tasks queueing.
804 - Fix median computation implementation.
805 - Fix fair share worker choice strategy internals update.
807 ## [2.4.11] - 2023-04-23
811 - Optimize free worker finding in worker choice strategies.
813 ## [2.4.10] - 2023-04-15
817 - Fix typescript type definition for task function: ensure the input data is optional.
818 - Fix typescript type definition for pool execute(): ensure the input data is optional.
820 ## [2.4.9] - 2023-04-15
824 - Add tasks queue enablement runtime setter to pool.
825 - Add tasks queue options runtime setter to pool.
826 - Add worker choice strategy options runtime setter to pool.
830 - Remove the tasks queuing experimental status.
834 - Fix task function type definition and validation.
835 - Fix worker choice strategy options handling.
837 ## [2.4.8] - 2023-04-12
841 - Fix message between main worker and worker type definition for tasks.
842 - Fix code documentation.
844 ## [2.4.7] - 2023-04-11
848 - Add worker tasks queue options to pool options.
852 - Fix missing documentation.
854 ## [2.4.6] - 2023-04-10
858 - Ensure one task at a time is executed per worker with tasks queueing enabled.
859 - Properly count worker executing tasks with tasks queueing enabled.
861 ## [2.4.5] - 2023-04-09
865 - Use monotonic high resolution timer for worker tasks runtime.
866 - Add worker tasks median runtime to statistics.
867 - Add worker tasks queue (experimental).
869 ## [2.4.4] - 2023-04-07
873 - Add `PoolEvents` enumeration and `PoolEvent` type.
877 - Destroy worker only on alive check.
879 ## [2.4.3] - 2023-04-07
883 - Fix typedoc generation with inheritance.
885 ## [2.4.2] - 2023-04-06
889 - Add `full` event to dynamic pool.
890 - Keep worker choice strategy in memory for conditional reuse.
894 - Fix possible negative worker key at worker removal in worker choice strategies.
896 ## [2.4.1] - 2023-04-05
900 - Optimize worker choice strategy for dynamic pool.
904 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
906 ## [2.4.0] - 2023-04-04
910 - Add `LESS_BUSY` worker choice strategy.
914 - Optimize worker storage in pool.
915 - Optimize worker alive status check.
916 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
917 - Optimize `LESS_USED` worker choice strategy.
918 - Update benchmark versus external threads pools.
919 - Optimize tasks usage statistics requirements for worker choice strategy.
923 - Ensure trimmable characters are checked at pool initialization.
924 - Fix message id integer overflow.
925 - Fix pool worker removal in worker choice strategy internals.
926 - Fix package publication with pnpm.
928 ## [2.4.0-3] - 2023-04-04
932 - Add `LESS_BUSY` worker choice strategy.
936 - Optimize worker storage in pool.
937 - Optimize worker alive status check.
938 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
939 - Optimize `LESS_USED` worker choice strategy.
940 - Update benchmark versus external threads pools.
944 - Ensure trimmable characters are checked at pool initialization.
945 - Fix message id integer overflow.
946 - Fix pool worker removal in worker choice strategy internals.
947 - Fix package publication with pnpm.
949 ## [2.4.0-2] - 2023-04-03
953 - Add `LESS_BUSY` worker choice strategy.
957 - Optimize worker storage in pool.
958 - Optimize worker alive status check.
959 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
960 - Optimize `LESS_USED` worker choice strategy.
964 - Ensure trimmable characters are checked at pool initialization.
965 - Fix message id integer overflow.
966 - Fix pool worker removal in worker choice strategy internals.
967 - Fix package publication with pnpm.
969 ## [2.4.0-1] - 2023-04-03
973 - Add `LESS_BUSY` worker choice strategy.
977 - Optimize worker storage in pool.
978 - Optimize worker alive status check.
979 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
980 - Optimize `LESS_USED` worker choice strategy.
984 - Ensure trimmable characters are checked at pool initialization.
985 - Fix message id integer overflow.
986 - Fix pool worker removal in worker choice strategy internals.
988 ## [2.4.0-0] - 2023-04-03
992 - Add `LESS_BUSY` worker choice strategy.
996 - Optimize worker storage in pool.
997 - Optimize worker alive status check.
998 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
999 - Optimize `LESS_USED` worker choice strategy.
1003 - Ensure trimmable characters are checked at pool initialization.
1004 - Fix message id integer overflow.
1005 - Fix pool worker removal in worker choice strategy internals.
1007 ## [2.3.10] - 2023-03-18
1011 - Fix package.json `exports` syntax for ESM and CommonJS.
1015 - Permit SemVer pre-release publication.
1017 ## [2.3.10-2] - 2023-03-18
1021 - Fix package.json `exports` syntax for ESM and CommonJS.
1023 ## [2.3.10-1] - 2023-03-18
1027 - Permit SemVer pre-release publication.
1029 ## [2.3.10-0] - 2023-03-18
1033 - Fix package.json `exports` syntax for ESM and CommonJS.
1035 ## [2.3.9] - 2023-03-18
1039 - Introduce ESM module support along with CommonJS one.
1043 - Fix brown paper bag bug referencing the same object literal.
1045 ## [2.3.8] - 2023-03-18
1049 - Switch internal benchmarking code to benny.
1050 - Switch to TypeScript 5.x.x.
1051 - Switch rollup bundler plugins to core ones.
1052 - Switch to TSDoc syntax.
1053 - Enforce conventional commits.
1057 - Fix random integer generator.
1058 - Fix worker choice strategy pool type identification at initialization.
1060 ## [2.3.7] - 2022-10-23
1064 - Switch to open collective FOSS project funding platform.
1065 - Switch to ts-standard linter configuration on TypeScript code.
1069 - Fixed missing async on pool execute method.
1070 - Fixed typing in TypeScript example.
1071 - Fixed types in unit tests.
1073 ## [2.3.6] - 2022-10-22
1077 - Cleanup pool attributes and methods.
1078 - Refine error types thrown.
1082 - Fix continuous integration build on windows.
1083 - Fix code coverage reporting by using c8 instead of nyc.
1085 ## [2.3.5] - 2022-10-21
1089 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
1090 - Optimize tasks usage lookup implementation.
1094 - Fix missed pool event emitter type export.
1095 - Fix typedoc documentation generation.
1097 ## [2.3.4] - 2022-10-17
1101 - Fully automate release process with release-it.
1105 - Optimize fair share task scheduling algorithm implementation.
1106 - Update benchmark versus external pools results with latest version.
1108 ## [2.3.3] - 2022-10-15
1112 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
1114 ## [2.3.2] - 2022-10-14
1118 - Optimize fair share worker selection strategy implementation.
1122 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
1124 ## [2.3.1] - 2022-10-13
1128 - Pool worker choice strategies:
1129 - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
1130 - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
1132 ## [2.2.2] - 2022-10-09
1136 - Fixed `README.md` file.
1138 ## [2.2.1] - 2022-10-08
1142 - Dynamic worker choice strategy change at runtime.
1144 ## [2.2.0] - 2022-01-05
1146 ### Breaking Changes
1148 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
1150 ## [2.1.0] - 2021-08-29
1154 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
1156 ### Breaking Changes
1158 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
1159 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
1160 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
1161 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
1163 ## [2.0.2] - 2021-05-12
1167 - Fix `busy` event emission on fixed pool type
1169 ## [2.0.1] - 2021-03-16
1173 - Check if pool options are properly set.
1174 - `busy` event is emitted on all pool types.
1176 ## [2.0.0] - 2021-03-01
1180 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1182 ### Breaking Changes
1184 - `FullPool` event is now renamed to `busy`.
1185 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1186 _Find more details on our JSDoc._
1188 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1190 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1192 ### Pool options types declaration merge
1194 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1196 #### New `export` strategy
1200 const DynamicThreadPool = require('poolifier/lib/dynamic')
1202 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1205 But you should always prefer just using
1208 const { DynamicThreadPool } = require('poolifier')
1211 #### New type definitions for input data and response
1213 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1214 _This is not a limitation by poolifier but Node.js._
1216 #### Public property replacements
1218 `numWorkers` property is now `numberOfWorkers`
1220 #### Internal (protected) properties and methods renaming
1222 These properties are not intended for end users
1224 - `id` => `nextMessageId`
1226 These methods are not intended for end users
1228 - `_chooseWorker` => `chooseWorker`
1229 - `_newWorker` => `createWorker`
1230 - `_execute` => `internalExecute`
1231 - `_chooseWorker` => `chooseWorker`
1232 - `_checkAlive` => `checkAlive`
1234 - `_runAsync` => `runAsync`
1236 ## [1.1.0] - 2020-05-21
1240 - ThreadWorker support async functions as option
1241 - Various external library patches
1243 ## [1.0.0] - 2020-01-24
1247 - FixedThreadPool implementation
1248 - DynamicThreadPool implementation
1249 - WorkerThread implementation to improve developer experience