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 - Fix CommonJS support with TypeScript.
14 ## [3.1.14] - 2024-01-01
18 - Properly handle dynamic pool with zero minimum size.
20 ## [3.1.13] - 2023-12-30
24 - Reduce branching in several hot code paths.
25 - Use faster object cloning implementation.
27 ## [3.1.12] - 2023-12-27
31 - Fix tasks redistribution triggers at pool destroying.
35 - Switch TypeScript module resolution to Node16.
37 ## [3.1.12-0] - 2023-12-27
41 - Fix tasks redistribution triggers at pool destroying.
43 ## [3.1.11] - 2023-12-24
47 - Avoid worker node cross tasks stealing.
48 - Ensure only half the pool worker nodes can steal tasks.
50 ## [3.1.10] - 2023-12-23
54 - Avoid useless branching on pool type.
56 ## [3.1.9] - 2023-12-22
60 - Readd ThreadPoolOptions and ClusterPoolOptions TS type aliases to PoolOptions.
62 ## [3.1.8] - 2023-12-21
66 - Fix default worker weight computation.
67 - Fix possible null exception at pool destroying.
69 ## [3.1.7] - 2023-12-20
73 - Ensure worker choice strategies implementation wait for worker node readiness: [#1748](https://github.com/poolifier/poolifier/issues/1748).
75 ## [3.1.6] - 2023-12-18
79 - Fix pool destroying with tasks queuing enabled.
81 ## [3.1.5] - 2023-12-18
85 - Add queued tasks end timeout support to worker node termination.
87 ## [3.1.4] - 2023-12-18
91 - Make more robust the fix for possible null exception at handling task execution response.
93 ## [3.1.3] - 2023-12-17
97 - Fix possible null exception at handling task execution response.
99 ## [3.1.2] - 2023-12-17
103 - Wait for queued tasks to end at worker node termination.
105 ## [3.1.1] - 2023-12-16
109 - Fix pool options TS type definition.
111 ## [3.1.0] - 2023-12-16
115 - TypeScript breaking change: merge ThreadPoolOptions and ClusterPoolOptions types into PoolOptions type.
117 ## [3.0.14] - 2023-12-13
121 - Fix possible null exception with worker_threads pools.
123 ## [3.0.13] - 2023-12-12
127 - Ensure worker choice strategy wait for worker nodes readiness.
131 - Remove infinite retries support in worker choice strategy to avoid configuration leading to possible infinite recursion or loop.
133 ## [3.0.12] - 2023-12-12
137 - Add infinite retries support in worker choice strategy.
139 ## [3.0.11] - 2023-12-11
143 - Ensure pool asynchronous resource properly track tasks execution.
145 ## [3.0.10] - 2023-12-08
149 - Add a fastpath when tasks stealing or redistribution is impossible.
151 ## [3.0.9] - 2023-11-26
155 - Remove all pool events listener at pool destroying.
156 - Remove all worker node events listener at worker node destroying.
157 - Fix worker node event emitter listeners handling memory leak at pool options runtime change.
159 ## [3.0.8] - 2023-11-25
163 - Ensure continuous tasks stealing on idle start at worker node idling.
165 ## [3.0.7] - 2023-11-24
169 - Make continuous tasks stealing start at worker node idling.
171 ## [3.0.6] - 2023-11-24
175 - Ensure pool statuses are checked at initialization, `start()` or `destroy()`.
176 - Ensure pool `ready` event can be emitted after several `start()/destroy()` cycles.
178 ## [3.0.5] - 2023-10-27
182 - Ensure pool `ready` event can be emitted only once.
184 ## [3.0.4] - 2023-10-20
188 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
189 - Use builtin retry mechanism in worker choice strategies instead of custom one.
191 ## [3.0.3] - 2023-10-19
195 - Avoid null exception at sending message to worker.
196 - Avoid null exception at checking worker node readiness.
198 ## [3.0.2] - 2023-10-17
202 - 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).
204 ## [3.0.1] - 2023-10-16
208 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
212 - Switch the worker node eventing code to `EventTarget` API.
214 ## [3.0.0] - 2023-10-08
218 - Remove Node.js 16.x.x (EOL) support.
220 ## [2.7.5] - 2023-10-03
224 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
226 ## [2.7.4] - 2023-09-25
230 - Fix source maps (bundler issue).
232 ## [2.7.3] - 2023-09-24
236 - Convert pool event emitter to event emitter async resource.
238 ## [2.7.2] - 2023-09-23
242 - Add source maps to npm package to ease debugging.
246 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
248 ## [2.7.1] - 2023-09-20
252 - Ensure worker message listener used one time are removed after usage.
254 ## [2.7.0] - 2023-09-19
258 - Fix task stealing related tasks queue options handling at runtime.
262 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
266 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
267 - Stricter worker constructor arguments validation.
269 ## [2.6.45] - 2023-09-17
273 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
277 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
278 - Add `start()` method to pool API to start the minimum number of workers.
279 - 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.
280 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
282 ## [2.6.44] - 2023-09-08
286 - Use a dedicated PAT to publish on GitHub packages registry.
290 - Publish on GitHub packages registry on release.
294 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
296 ## [2.6.43] - 2023-09-08
300 - Publish on GitHub packages registry on release.
304 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
306 ## [2.6.42] - 2023-09-06
310 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
312 ## [2.6.41] - 2023-09-03
316 - Optimize worker choice strategies implementation.
318 ## [2.6.40] - 2023-09-01
322 - Do not pre-choose in WRR worker choice strategy to avoid bias.
323 - Avoid array out of bound in worker choice strategies after worker node removal.
325 ## [2.6.39] - 2023-08-30
329 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
331 ## [2.6.38] - 2023-08-30
335 - Bundle typescript types declaration into one file.
339 - Improve interleaved weighted round robin worker choice strategy implementation.
341 ## [2.6.37] - 2023-08-28
345 - Ensure unused worker usage statistics are deleted at runtime.
349 - Rename worker choice strategy options `choiceRetries` to `retries`.
350 - Avoid unnecessary branching in worker choice strategies.
352 ## [2.6.36] - 2023-08-27
356 - Fix pool `execute()` arguments check.
360 - Make continuous tasks stealing algorithm less aggressive.
361 - Fine tune tasks stealing algorithm under back pressure.
363 ## [2.6.35] - 2023-08-25
367 - Don't account worker usage statistics for tasks that have failed.
368 - Fix pool information runtime and wait time median computation.
372 - Update simple moving average implementation to use a circular buffer.
373 - Update simple moving median implementation to use a circular buffer.
374 - Account for stolen tasks in worker usage statistics and pool information.
378 - Continuous tasks stealing algorithm.
380 ## [2.6.34] - 2023-08-24
384 - Avoid cascading tasks stealing under back pressure.
388 - Add fastpath to queued tasks rescheduling.
390 ## [2.6.33] - 2023-08-24
394 - Fix queued tasks rescheduling.
398 - Rename tasks queue options `queueMaxSize` to `size`.
402 - Task stealing scheduling algorithm if tasks queueing is enabled.
404 ## [2.6.32] - 2023-08-23
408 - Ensure no task can be executed when the pool is destroyed.
412 - Add `queueMaxSize` option to tasks queue options.
413 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
414 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
416 ## [2.6.31] - 2023-08-20
420 - Fix worker choice strategy retries mechanism in some edge cases.
424 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
425 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
427 ## [2.6.30] - 2023-08-19
431 - Ensure pool event `backPressure` is emitted.
432 - Ensure pool event `full` is emitted only once.
433 - Ensure worker node cannot be instantiated without proper arguments.
435 ## [2.6.29] - 2023-08-18
439 - Fix race condition between readiness and task functions worker message handling at startup.
440 - Fix duplicate task function worker usage statistics computation per task function.
441 - Update task function worker usage statistics if and only if there's at least two different task functions.
442 - Fix race condition at task function worker usage executing task computation leading to negative value.
446 - 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).
447 - Use back pressure detection in worker choice strategies.
448 - Add worker choice strategies retries mechanism if no worker is eligible.
450 ## [2.6.28] - 2023-08-16
454 - Ensure pool workers are properly initialized.
458 - HTTP server pool examples: express-cluster, express-hybrid.
462 - Remove now useless branching in worker hot code path.
464 ## [2.6.27] - 2023-08-15
468 - Add `KillHandler` type definition to exported types.
472 - Add `destroy` event to pool API.
474 ## [2.6.26] - 2023-08-15
478 - Add kill handler to worker options allowing to execute custom code when worker is killed.
479 - Add `listTaskFunctions()` method to pool API.
480 - SMTP client pool example: nodemailer.
482 ## [2.6.25] - 2023-08-13
486 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
487 - WebSocket server pool examples: ws-cluster, ws-hybrid.
489 ## [2.6.24] - 2023-08-12
493 - Add array of transferable objects to the `execute()` method arguments.
494 - WebSocket server pool examples: ws-worker_threads.
496 ## [2.6.23] - 2023-08-11
500 - 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.
504 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
505 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
507 ## [2.6.22] - 2023-08-10
511 - Add missing `types` field to package.json `exports`.
515 - Structure markdown documentation (PR #811).
517 ## [2.6.21] - 2023-08-03
521 - Improve code documentation.
522 - Code refactoring and cleanup for better maintainability and readability.
524 ## [2.6.20] - 2023-07-21
528 - Fix queued tasks redistribution on error task execution starvation.
529 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
533 - Drastically reduce lookups by worker in the worker nodes.
535 ## [2.6.19] - 2023-07-20
539 - Dedicated internal communication channel for worker_threads pools.
541 ## [2.6.18] - 2023-07-19
545 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
547 ## [2.6.17] - 2023-07-16
551 - Add `listTaskFunctions()` method to worker API.
553 ## [2.6.16] - 2023-07-12
557 - Fix pool startup detection.
558 - Fix worker task functions handling.
560 ## [2.6.15] - 2023-07-11
564 - Take into account worker node readiness in worker choice strategies.
566 ## [2.6.14] - 2023-07-10
570 - Fix task function statistics tracking.
572 ## [2.6.13] - 2023-07-10
576 - Add per task function statistics tracking.
577 - Add public methods to manipulate the worker task functions at runtime.
579 ## [2.6.12] - 2023-07-09
583 - Workaround import issue with `node:os` module in node 16.x.x.
585 ## [2.6.11] - 2023-07-09
589 - Fix pool readiness semantic.
591 ## [2.6.10] - 2023-07-08
595 - Ensure workers are not recreated on error at pool startup.
599 - Add `ready` and `strategy` fields to pool information.
600 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
601 - Add dynamic pool sizing checks.
603 ## [2.6.9] - 2023-07-07
607 - Recreate the right worker type on uncaught exception.
611 - Add minimum and maximum to internal measurement statistics.
612 - Add `runTime` and `waitTime` to pool information.
613 - Check worker inactive time only on dynamic worker.
615 ## [2.6.8] - 2023-07-03
619 - Brown paper bag release to fix version handling in pool information.
621 ## [2.6.7] - 2023-07-03
625 - Ensure worker queued tasks at error are reassigned to other pool workers.
629 - Add pool `utilization` ratio to pool information.
630 - Add `version` to pool information.
631 - Add worker information to worker nodes.
633 ## [2.6.6] - 2023-07-01
637 - Add safe helper `availableParallelism()` to help sizing the pool.
641 - Ensure message handler is only registered in worker.
643 ## [2.6.5] - 2023-06-27
647 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
651 - Artificial version bump to 2.6.5 to workaround publication issue.
652 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
653 - Ensure pool event is emitted before task error promise rejection.
654 - Fix queued tasks count computation.
658 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
660 ## [2.6.4] - 2023-06-27
664 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
668 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
669 - Ensure pool event is emitted before task error promise rejection.
670 - Fix queued tasks count computation.
674 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
676 ## [2.6.3] - 2023-06-19
680 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
681 - Update strategies internals after statistics computation.
685 - Optimize O(1) queue implementation.
687 ## [2.6.2] - 2023-06-12
691 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
693 ## [2.6.1] - 2023-06-10
697 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
701 - Fix average statistics computation: ensure failed tasks are not accounted.
703 ## [2.6.0] - 2023-06-09
707 - Add `LEAST_ELU` worker choice strategy (experimental).
708 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
712 - Refactor pool worker node usage internals.
713 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
714 - Breaking change: pool information `info` property object fields have been renamed.
718 - Fix wait time accounting.
719 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
720 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
722 ## [2.5.4] - 2023-06-07
726 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
730 - Compute statistics at the worker level only if needed.
731 - Add `worker_threads` options to thread pool options.
735 - Make the `LEAST_BUSY` strategy only relies on task runtime.
737 ## [2.5.3] - 2023-06-04
741 - Refine pool information content.
742 - Limit pool internals public exposure.
744 ## [2.5.2] - 2023-06-02
748 - Add `taskError` pool event for task execution error.
749 - Add pool information `info` property to pool.
750 - Emit pool information on `busy` and `full` pool events.
752 ## [2.5.1] - 2023-06-01
756 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
757 - Add `error` pool event for uncaught worker error.
759 ## [2.5.0] - 2023-05-31
763 - Switch pool event emitter to `EventEmitterAsyncResource`.
764 - Add tasks wait time accounting in per worker tasks usage.
765 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
769 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
771 ## [2.4.14] - 2023-05-09
775 - Ensure no undefined task runtime can land in the tasks history.
776 - Fix median computation implementation once again.
780 - Unit tests for median and queue implementations.
782 ## [2.4.13] - 2023-05-08
786 - Fix worker choice strategy options validation.
787 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
789 ## [2.4.12] - 2023-05-06
793 - Support multiple task functions per worker.
794 - Add custom worker weights support to worker choice strategies options.
798 - Use O(1) queue implementation for tasks queueing.
802 - Fix median computation implementation.
803 - Fix fair share worker choice strategy internals update.
805 ## [2.4.11] - 2023-04-23
809 - Optimize free worker finding in worker choice strategies.
811 ## [2.4.10] - 2023-04-15
815 - Fix typescript type definition for task function: ensure the input data is optional.
816 - Fix typescript type definition for pool execute(): ensure the input data is optional.
818 ## [2.4.9] - 2023-04-15
822 - Add tasks queue enablement runtime setter to pool.
823 - Add tasks queue options runtime setter to pool.
824 - Add worker choice strategy options runtime setter to pool.
828 - Remove the tasks queuing experimental status.
832 - Fix task function type definition and validation.
833 - Fix worker choice strategy options handling.
835 ## [2.4.8] - 2023-04-12
839 - Fix message between main worker and worker type definition for tasks.
840 - Fix code documentation.
842 ## [2.4.7] - 2023-04-11
846 - Add worker tasks queue options to pool options.
850 - Fix missing documentation.
852 ## [2.4.6] - 2023-04-10
856 - Ensure one task at a time is executed per worker with tasks queueing enabled.
857 - Properly count worker executing tasks with tasks queueing enabled.
859 ## [2.4.5] - 2023-04-09
863 - Use monotonic high resolution timer for worker tasks runtime.
864 - Add worker tasks median runtime to statistics.
865 - Add worker tasks queue (experimental).
867 ## [2.4.4] - 2023-04-07
871 - Add `PoolEvents` enumeration and `PoolEvent` type.
875 - Destroy worker only on alive check.
877 ## [2.4.3] - 2023-04-07
881 - Fix typedoc generation with inheritance.
883 ## [2.4.2] - 2023-04-06
887 - Add `full` event to dynamic pool.
888 - Keep worker choice strategy in memory for conditional reuse.
892 - Fix possible negative worker key at worker removal in worker choice strategies.
894 ## [2.4.1] - 2023-04-05
898 - Optimize worker choice strategy for dynamic pool.
902 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
904 ## [2.4.0] - 2023-04-04
908 - Add `LESS_BUSY` worker choice strategy.
912 - Optimize worker storage in pool.
913 - Optimize worker alive status check.
914 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
915 - Optimize `LESS_USED` worker choice strategy.
916 - Update benchmark versus external threads pools.
917 - Optimize tasks usage statistics requirements for worker choice strategy.
921 - Ensure trimmable characters are checked at pool initialization.
922 - Fix message id integer overflow.
923 - Fix pool worker removal in worker choice strategy internals.
924 - Fix package publication with pnpm.
926 ## [2.4.0-3] - 2023-04-04
930 - Add `LESS_BUSY` worker choice strategy.
934 - Optimize worker storage in pool.
935 - Optimize worker alive status check.
936 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
937 - Optimize `LESS_USED` worker choice strategy.
938 - Update benchmark versus external threads pools.
942 - Ensure trimmable characters are checked at pool initialization.
943 - Fix message id integer overflow.
944 - Fix pool worker removal in worker choice strategy internals.
945 - Fix package publication with pnpm.
947 ## [2.4.0-2] - 2023-04-03
951 - Add `LESS_BUSY` worker choice strategy.
955 - Optimize worker storage in pool.
956 - Optimize worker alive status check.
957 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
958 - Optimize `LESS_USED` worker choice strategy.
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 ## [2.4.0-1] - 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.
986 ## [2.4.0-0] - 2023-04-03
990 - Add `LESS_BUSY` worker choice strategy.
994 - Optimize worker storage in pool.
995 - Optimize worker alive status check.
996 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
997 - Optimize `LESS_USED` worker choice strategy.
1001 - Ensure trimmable characters are checked at pool initialization.
1002 - Fix message id integer overflow.
1003 - Fix pool worker removal in worker choice strategy internals.
1005 ## [2.3.10] - 2023-03-18
1009 - Fix package.json `exports` syntax for ESM and CommonJS.
1013 - Permit SemVer pre-release publication.
1015 ## [2.3.10-2] - 2023-03-18
1019 - Fix package.json `exports` syntax for ESM and CommonJS.
1021 ## [2.3.10-1] - 2023-03-18
1025 - Permit SemVer pre-release publication.
1027 ## [2.3.10-0] - 2023-03-18
1031 - Fix package.json `exports` syntax for ESM and CommonJS.
1033 ## [2.3.9] - 2023-03-18
1037 - Introduce ESM module support along with CommonJS one.
1041 - Fix brown paper bag bug referencing the same object literal.
1043 ## [2.3.8] - 2023-03-18
1047 - Switch internal benchmarking code to benny.
1048 - Switch to TypeScript 5.x.x.
1049 - Switch rollup bundler plugins to core ones.
1050 - Switch to TSDoc syntax.
1051 - Enforce conventional commits.
1055 - Fix random integer generator.
1056 - Fix worker choice strategy pool type identification at initialization.
1058 ## [2.3.7] - 2022-10-23
1062 - Switch to open collective FOSS project funding platform.
1063 - Switch to ts-standard linter configuration on TypeScript code.
1067 - Fixed missing async on pool execute method.
1068 - Fixed typing in TypeScript example.
1069 - Fixed types in unit tests.
1071 ## [2.3.6] - 2022-10-22
1075 - Cleanup pool attributes and methods.
1076 - Refine error types thrown.
1080 - Fix continuous integration build on windows.
1081 - Fix code coverage reporting by using c8 instead of nyc.
1083 ## [2.3.5] - 2022-10-21
1087 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
1088 - Optimize tasks usage lookup implementation.
1092 - Fix missed pool event emitter type export.
1093 - Fix typedoc documentation generation.
1095 ## [2.3.4] - 2022-10-17
1099 - Fully automate release process with release-it.
1103 - Optimize fair share task scheduling algorithm implementation.
1104 - Update benchmark versus external pools results with latest version.
1106 ## [2.3.3] - 2022-10-15
1110 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
1112 ## [2.3.2] - 2022-10-14
1116 - Optimize fair share worker selection strategy implementation.
1120 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
1122 ## [2.3.1] - 2022-10-13
1126 - Pool worker choice strategies:
1127 - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
1128 - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
1130 ## [2.2.2] - 2022-10-09
1134 - Fixed `README.md` file.
1136 ## [2.2.1] - 2022-10-08
1140 - Dynamic worker choice strategy change at runtime.
1142 ## [2.2.0] - 2022-01-05
1144 ### Breaking Changes
1146 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
1148 ## [2.1.0] - 2021-08-29
1152 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
1154 ### Breaking Changes
1156 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
1157 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
1158 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
1159 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
1161 ## [2.0.2] - 2021-05-12
1165 - Fix `busy` event emission on fixed pool type
1167 ## [2.0.1] - 2021-03-16
1171 - Check if pool options are properly set.
1172 - `busy` event is emitted on all pool types.
1174 ## [2.0.0] - 2021-03-01
1178 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1180 ### Breaking Changes
1182 - `FullPool` event is now renamed to `busy`.
1183 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1184 _Find more details on our JSDoc._
1186 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1188 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1190 ### Pool options types declaration merge
1192 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1194 #### New `export` strategy
1198 const DynamicThreadPool = require('poolifier/lib/dynamic')
1200 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1203 But you should always prefer just using
1206 const { DynamicThreadPool } = require('poolifier')
1209 #### New type definitions for input data and response
1211 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1212 _This is not a limitation by poolifier but Node.js._
1214 #### Public property replacements
1216 `numWorkers` property is now `numberOfWorkers`
1218 #### Internal (protected) properties and methods renaming
1220 These properties are not intended for end users
1222 - `id` => `nextMessageId`
1224 These methods are not intended for end users
1226 - `_chooseWorker` => `chooseWorker`
1227 - `_newWorker` => `createWorker`
1228 - `_execute` => `internalExecute`
1229 - `_chooseWorker` => `chooseWorker`
1230 - `_checkAlive` => `checkAlive`
1232 - `_runAsync` => `runAsync`
1234 ## [1.1.0] - 2020-05-21
1238 - ThreadWorker support async functions as option
1239 - Various external library patches
1241 ## [1.0.0] - 2020-01-24
1245 - FixedThreadPool implementation
1246 - DynamicThreadPool implementation
1247 - WorkerThread implementation to improve developer experience