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 ## [4.0.9] - 2024-05-19
14 - Add ELU `utilization` statistics to pool information.
16 ## [4.0.8] - 2024-05-15
20 - Fix default task function worker choice strategy and priority handling.
22 ## [4.0.7] - 2024-05-13
26 - Add ELU statistics to pool information.
28 ## [4.0.6] - 2024-05-10
32 - Fix pools' `addTaskFunction()` type definition.
34 ## [4.0.5] - 2024-05-09
38 - Avoid queued tasks redistribution on the errored worker node.
40 ## [4.0.4] - 2024-05-08
44 - Disable `tasksStealingOnBackPressure` by default until performance issues under heavy load are sorted out.
46 ## [4.0.3] - 2024-05-08
50 - Optimize task(s) stealing by dequeuing task(s) from the last prioritized bucket.
52 ## [4.0.2] - 2024-05-06
56 - Ensure poolifier worker task performance measurement requirements are synchronized with task function objects' worker choice strategies.
58 ## [4.0.1] - 2024-05-02
62 - Ensure dynamic worker node are initialized with sensible worker node usage default values to avoid worker choice strategies biased decisions.
63 - Account for tasks wait time in task execution time computation in worker choice strategies to avoid biased decisions under load with several prioritized task functions and tasks queue enabled.
65 ## [4.0.0] - 2024-04-30
69 - Support per task function(s) priority and worker choice strategy definition via a task function object: `{ taskFunction: (data?: Data) => Response | Promise<Response>, priority?: number, strategy?: WorkerChoiceStrategy }`.
70 - Add priority queue based tasks queueing. One priority queue is divided into prioritized buckets to avoid queued tasks starvation under load.
71 - BREAKING CHANGE: `listTaskFunctionNames()` to `listTaskFunctionsProperties()` in pool and worker API returning registered task functions properties.
72 - BREAKING CHANGE: `strategy` field in pool information renamed to `defaultStrategy`.
76 - Ensure worker choice strategy options changes at runtime are propagated to poolifier workers.
78 ## [3.1.30] - 2024-04-22
82 - Fix `transferList` argument type definition.
84 ## [3.1.29] - 2024-04-02
88 - Fix possible race condition at worker node recreation on worker `error` and `exit` events.
90 ## [3.1.28] - 2024-04-01
94 - Ensure the minimum number of workers on a started pool is guaranteed.
96 ## [3.1.27] - 2024-03-27
100 - Fix publishing on JSR, take 4.
102 ## [3.1.26] - 2024-03-27
106 - Fix publishing on JSR, take 3.
108 ## [3.1.25] - 2024-03-27
112 - Fix publishing on JSR, take 2.
114 ## [3.1.24] - 2024-03-27
118 - Fix publishing on JSR.
120 ## [3.1.23] - 2024-03-27
126 ## [3.1.22] - 2024-03-15
130 - Fix pool event emitter registered callbacks removal at `destroy()`.
132 ## [3.1.21] - 2024-02-22
136 - Fix null exception regression: [#1496](https://github.com/poolifier/poolifier/issues/1496).
138 ## [3.1.20] - 2024-02-11
142 - Ensure `worker_threads` workers are unreferenced at termination.
144 ## [3.1.19] - 2024-01-16
148 - Fix possible null exception at task finishing handling.
152 - Optimize Deque implementation to improve tasks queueing performance.
154 ## [3.1.18] - 2024-01-06
158 - Fix dynamic pool with minimum number of workers set to zero: [#1748](https://github.com/poolifier/poolifier/issues/1748).
160 ## [3.1.17] - 2024-01-05
164 - Improve performance by clean up unneeded condition checks on hot code paths.
166 ## [3.1.16] - 2024-01-03
170 - Add missing type to TS type definitions.
172 ## [3.1.15] - 2024-01-02
176 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
178 ## [3.1.15-0] - 2024-01-02
182 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
184 ## [3.1.14] - 2024-01-01
188 - Properly handle dynamic pool with zero minimum size.
190 ## [3.1.13] - 2023-12-30
194 - Reduce branching in several hot code paths.
195 - Use faster object cloning implementation.
197 ## [3.1.12] - 2023-12-27
201 - Fix tasks redistribution triggers at pool destroying.
205 - Switch TypeScript module resolution to Node16.
207 ## [3.1.12-0] - 2023-12-27
211 - Fix tasks redistribution triggers at pool destroying.
213 ## [3.1.11] - 2023-12-24
217 - Avoid worker node cross tasks stealing.
218 - Ensure only half the pool worker nodes can steal tasks.
220 ## [3.1.10] - 2023-12-23
224 - Avoid useless branching on pool type.
226 ## [3.1.9] - 2023-12-22
230 - Readd ThreadPoolOptions and ClusterPoolOptions TS type aliases to PoolOptions.
232 ## [3.1.8] - 2023-12-21
236 - Fix default worker weight computation.
237 - Fix possible null exception at pool destroying.
239 ## [3.1.7] - 2023-12-20
243 - Ensure worker choice strategies implementation wait for worker node readiness: [#1748](https://github.com/poolifier/poolifier/issues/1748).
245 ## [3.1.6] - 2023-12-18
249 - Fix pool destroying with tasks queuing enabled.
251 ## [3.1.5] - 2023-12-18
255 - Add queued tasks end timeout support to worker node termination.
257 ## [3.1.4] - 2023-12-18
261 - Make more robust the fix for possible null exception at handling task execution response.
263 ## [3.1.3] - 2023-12-17
267 - Fix possible null exception at handling task execution response.
269 ## [3.1.2] - 2023-12-17
273 - Wait for queued tasks to end at worker node termination.
275 ## [3.1.1] - 2023-12-16
279 - Fix pool options TS type definition.
281 ## [3.1.0] - 2023-12-16
285 - TypeScript breaking change: merge ThreadPoolOptions and ClusterPoolOptions types into PoolOptions type.
287 ## [3.0.14] - 2023-12-13
291 - Fix possible null exception with worker_threads pools.
293 ## [3.0.13] - 2023-12-12
297 - Ensure worker choice strategy wait for worker nodes readiness.
301 - Remove infinite retries support in worker choice strategy to avoid configuration leading to possible infinite recursion or loop.
303 ## [3.0.12] - 2023-12-12
307 - Add infinite retries support in worker choice strategy.
309 ## [3.0.11] - 2023-12-11
313 - Ensure pool asynchronous resource properly track tasks execution.
315 ## [3.0.10] - 2023-12-08
319 - Add a fastpath when tasks stealing or redistribution is impossible.
321 ## [3.0.9] - 2023-11-26
325 - Remove all pool events listener at pool destroying.
326 - Remove all worker node events listener at worker node destroying.
327 - Fix worker node event emitter listeners handling memory leak at pool options runtime change.
329 ## [3.0.8] - 2023-11-25
333 - Ensure continuous tasks stealing on idle start at worker node idling.
335 ## [3.0.7] - 2023-11-24
339 - Make continuous tasks stealing start at worker node idling.
341 ## [3.0.6] - 2023-11-24
345 - Ensure pool statuses are checked at initialization, `start()` or `destroy()`.
346 - Ensure pool `ready` event can be emitted after several `start()/destroy()` cycles.
348 ## [3.0.5] - 2023-10-27
352 - Ensure pool `ready` event can be emitted only once.
354 ## [3.0.4] - 2023-10-20
358 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
359 - Use builtin retry mechanism in worker choice strategies instead of custom one.
361 ## [3.0.3] - 2023-10-19
365 - Avoid null exception at sending message to worker.
366 - Avoid null exception at checking worker node readiness.
368 ## [3.0.2] - 2023-10-17
372 - 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).
374 ## [3.0.1] - 2023-10-16
378 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
382 - Switch the worker node eventing code to `EventTarget` API.
384 ## [3.0.0] - 2023-10-08
388 - Remove Node.js 16.x.x (EOL) support.
390 ## [2.7.5] - 2023-10-03
394 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
396 ## [2.7.4] - 2023-09-25
400 - Fix source maps (bundler issue).
402 ## [2.7.3] - 2023-09-24
406 - Convert pool event emitter to event emitter async resource.
408 ## [2.7.2] - 2023-09-23
412 - Add source maps to npm package to ease debugging.
416 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
418 ## [2.7.1] - 2023-09-20
422 - Ensure worker message listener used one time are removed after usage.
424 ## [2.7.0] - 2023-09-19
428 - Fix task stealing related tasks queue options handling at runtime.
432 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
436 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
437 - Stricter worker constructor arguments validation.
439 ## [2.6.45] - 2023-09-17
443 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
447 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
448 - Add `start()` method to pool API to start the minimum number of workers.
449 - Add `taskStealing` and `tasksStealingOnBackPressure` to tasks queue options to whether enable task stealing or not and whether enable tasks stealing under back pressure or not.
450 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
452 ## [2.6.44] - 2023-09-08
456 - Use a dedicated PAT to publish on GitHub packages registry.
460 - Publish on GitHub packages registry on release.
464 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
466 ## [2.6.43] - 2023-09-08
470 - Publish on GitHub packages registry on release.
474 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
476 ## [2.6.42] - 2023-09-06
480 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
482 ## [2.6.41] - 2023-09-03
486 - Optimize worker choice strategies implementation.
488 ## [2.6.40] - 2023-09-01
492 - Do not pre-choose in WRR worker choice strategy to avoid bias.
493 - Avoid array out of bound in worker choice strategies after worker node removal.
495 ## [2.6.39] - 2023-08-30
499 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
501 ## [2.6.38] - 2023-08-30
505 - Bundle typescript types declaration into one file.
509 - Improve interleaved weighted round robin worker choice strategy implementation.
511 ## [2.6.37] - 2023-08-28
515 - Ensure unused worker usage statistics are deleted at runtime.
519 - Rename worker choice strategy options `choiceRetries` to `retries`.
520 - Avoid unnecessary branching in worker choice strategies.
522 ## [2.6.36] - 2023-08-27
526 - Fix pool `execute()` arguments check.
530 - Make continuous tasks stealing algorithm less aggressive.
531 - Fine tune tasks stealing algorithm under back pressure.
533 ## [2.6.35] - 2023-08-25
537 - Don't account worker usage statistics for tasks that have failed.
538 - Fix pool information runtime and wait time median computation.
542 - Update simple moving average implementation to use a circular buffer.
543 - Update simple moving median implementation to use a circular buffer.
544 - Account for stolen tasks in worker usage statistics and pool information.
548 - Continuous tasks stealing algorithm.
550 ## [2.6.34] - 2023-08-24
554 - Avoid cascading tasks stealing under back pressure.
558 - Add fastpath to queued tasks rescheduling.
560 ## [2.6.33] - 2023-08-24
564 - Fix queued tasks rescheduling.
568 - Rename tasks queue options `queueMaxSize` to `size`.
572 - Task stealing scheduling algorithm if tasks queueing is enabled.
574 ## [2.6.32] - 2023-08-23
578 - Ensure no task can be executed when the pool is destroyed.
582 - Add `queueMaxSize` option to tasks queue options.
583 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
584 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
586 ## [2.6.31] - 2023-08-20
590 - Fix worker choice strategy retries mechanism in some edge cases.
594 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
595 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
597 ## [2.6.30] - 2023-08-19
601 - Ensure pool event `backPressure` is emitted.
602 - Ensure pool event `full` is emitted only once.
603 - Ensure worker node cannot be instantiated without proper arguments.
605 ## [2.6.29] - 2023-08-18
609 - Fix race condition between readiness and task functions worker message handling at startup.
610 - Fix duplicate task function worker usage statistics computation per task function.
611 - Update task function worker usage statistics if and only if there's at least two different task functions.
612 - Fix race condition at task function worker usage executing task computation leading to negative value.
616 - 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).
617 - Use back pressure detection in worker choice strategies.
618 - Add worker choice strategies retries mechanism if no worker is eligible.
620 ## [2.6.28] - 2023-08-16
624 - Ensure pool workers are properly initialized.
628 - HTTP server pool examples: express-cluster, express-hybrid.
632 - Remove now useless branching in worker hot code path.
634 ## [2.6.27] - 2023-08-15
638 - Add `KillHandler` type definition to exported types.
642 - Add `destroy` event to pool API.
644 ## [2.6.26] - 2023-08-15
648 - Add kill handler to worker options allowing to execute custom code when worker is killed.
649 - Add `listTaskFunctions()` method to pool API.
650 - SMTP client pool example: nodemailer.
652 ## [2.6.25] - 2023-08-13
656 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
657 - WebSocket server pool examples: ws-cluster, ws-hybrid.
659 ## [2.6.24] - 2023-08-12
663 - Add array of transferable objects to the `execute()` method arguments.
664 - WebSocket server pool examples: ws-worker_threads.
666 ## [2.6.23] - 2023-08-11
670 - 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.
674 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
675 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
677 ## [2.6.22] - 2023-08-10
681 - Add missing `types` field to package.json `exports`.
685 - Structure markdown documentation (PR #811).
687 ## [2.6.21] - 2023-08-03
691 - Improve code documentation.
692 - Code refactoring and cleanup for better maintainability and readability.
694 ## [2.6.20] - 2023-07-21
698 - Fix queued tasks redistribution on error task execution starvation.
699 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
703 - Drastically reduce lookups by worker in the worker nodes.
705 ## [2.6.19] - 2023-07-20
709 - Dedicated internal communication channel for worker_threads pools.
711 ## [2.6.18] - 2023-07-19
715 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
717 ## [2.6.17] - 2023-07-16
721 - Add `listTaskFunctions()` method to worker API.
723 ## [2.6.16] - 2023-07-12
727 - Fix pool startup detection.
728 - Fix worker task functions handling.
730 ## [2.6.15] - 2023-07-11
734 - Take into account worker node readiness in worker choice strategies.
736 ## [2.6.14] - 2023-07-10
740 - Fix task function statistics tracking.
742 ## [2.6.13] - 2023-07-10
746 - Add per task function statistics tracking.
747 - Add public methods to manipulate the worker task functions at runtime.
749 ## [2.6.12] - 2023-07-09
753 - Workaround import issue with `node:os` module in node 16.x.x.
755 ## [2.6.11] - 2023-07-09
759 - Fix pool readiness semantic.
761 ## [2.6.10] - 2023-07-08
765 - Ensure workers are not recreated on error at pool startup.
769 - Add `ready` and `strategy` fields to pool information.
770 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
771 - Add dynamic pool sizing checks.
773 ## [2.6.9] - 2023-07-07
777 - Recreate the right worker type on uncaught exception.
781 - Add minimum and maximum to internal measurement statistics.
782 - Add `runTime` and `waitTime` to pool information.
783 - Check worker inactive time only on dynamic worker.
785 ## [2.6.8] - 2023-07-03
789 - Brown paper bag release to fix version handling in pool information.
791 ## [2.6.7] - 2023-07-03
795 - Ensure worker queued tasks at error are reassigned to other pool workers.
799 - Add pool `utilization` ratio to pool information.
800 - Add `version` to pool information.
801 - Add worker information to worker nodes.
803 ## [2.6.6] - 2023-07-01
807 - Add safe helper `availableParallelism()` to help sizing the pool.
811 - Ensure message handler is only registered in worker.
813 ## [2.6.5] - 2023-06-27
817 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
821 - Artificial version bump to 2.6.5 to workaround publication issue.
822 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
823 - Ensure pool event is emitted before task error promise rejection.
824 - Fix queued tasks count computation.
828 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
830 ## [2.6.4] - 2023-06-27
834 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
838 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
839 - Ensure pool event is emitted before task error promise rejection.
840 - Fix queued tasks count computation.
844 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
846 ## [2.6.3] - 2023-06-19
850 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
851 - Update strategies internals after statistics computation.
855 - Optimize O(1) queue implementation.
857 ## [2.6.2] - 2023-06-12
861 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
863 ## [2.6.1] - 2023-06-10
867 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
871 - Fix average statistics computation: ensure failed tasks are not accounted.
873 ## [2.6.0] - 2023-06-09
877 - Add `LEAST_ELU` worker choice strategy (experimental).
878 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
882 - Refactor pool worker node usage internals.
883 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
884 - Breaking change: pool information `info` property object fields have been renamed.
888 - Fix wait time accounting.
889 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
890 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
892 ## [2.5.4] - 2023-06-07
896 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
900 - Compute statistics at the worker level only if needed.
901 - Add `worker_threads` options to thread pool options.
905 - Make the `LEAST_BUSY` strategy only relies on task runtime.
907 ## [2.5.3] - 2023-06-04
911 - Refine pool information content.
912 - Limit pool internals public exposure.
914 ## [2.5.2] - 2023-06-02
918 - Add `taskError` pool event for task execution error.
919 - Add pool information `info` property to pool.
920 - Emit pool information on `busy` and `full` pool events.
922 ## [2.5.1] - 2023-06-01
926 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
927 - Add `error` pool event for uncaught worker error.
929 ## [2.5.0] - 2023-05-31
933 - Switch pool event emitter to `EventEmitterAsyncResource`.
934 - Add tasks wait time accounting in per worker tasks usage.
935 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
939 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
941 ## [2.4.14] - 2023-05-09
945 - Ensure no undefined task runtime can land in the tasks history.
946 - Fix median computation implementation once again.
950 - Unit tests for median and queue implementations.
952 ## [2.4.13] - 2023-05-08
956 - Fix worker choice strategy options validation.
957 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
959 ## [2.4.12] - 2023-05-06
963 - Support multiple task functions per worker.
964 - Add custom worker weights support to worker choice strategies options.
968 - Use O(1) queue implementation for tasks queueing.
972 - Fix median computation implementation.
973 - Fix fair share worker choice strategy internals update.
975 ## [2.4.11] - 2023-04-23
979 - Optimize free worker finding in worker choice strategies.
981 ## [2.4.10] - 2023-04-15
985 - Fix typescript type definition for task function: ensure the input data is optional.
986 - Fix typescript type definition for pool execute(): ensure the input data is optional.
988 ## [2.4.9] - 2023-04-15
992 - Add tasks queue enablement runtime setter to pool.
993 - Add tasks queue options runtime setter to pool.
994 - Add worker choice strategy options runtime setter to pool.
998 - Remove the tasks queuing experimental status.
1002 - Fix task function type definition and validation.
1003 - Fix worker choice strategy options handling.
1005 ## [2.4.8] - 2023-04-12
1009 - Fix message between main worker and worker type definition for tasks.
1010 - Fix code documentation.
1012 ## [2.4.7] - 2023-04-11
1016 - Add worker tasks queue options to pool options.
1020 - Fix missing documentation.
1022 ## [2.4.6] - 2023-04-10
1026 - Ensure one task at a time is executed per worker with tasks queueing enabled.
1027 - Properly count worker executing tasks with tasks queueing enabled.
1029 ## [2.4.5] - 2023-04-09
1033 - Use monotonic high resolution timer for worker tasks runtime.
1034 - Add worker tasks median runtime to statistics.
1035 - Add worker tasks queue (experimental).
1037 ## [2.4.4] - 2023-04-07
1041 - Add `PoolEvents` enumeration and `PoolEvent` type.
1045 - Destroy worker only on alive check.
1047 ## [2.4.3] - 2023-04-07
1051 - Fix typedoc generation with inheritance.
1053 ## [2.4.2] - 2023-04-06
1057 - Add `full` event to dynamic pool.
1058 - Keep worker choice strategy in memory for conditional reuse.
1062 - Fix possible negative worker key at worker removal in worker choice strategies.
1064 ## [2.4.1] - 2023-04-05
1068 - Optimize worker choice strategy for dynamic pool.
1072 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
1074 ## [2.4.0] - 2023-04-04
1078 - Add `LESS_BUSY` worker choice strategy.
1082 - Optimize worker storage in pool.
1083 - Optimize worker alive status check.
1084 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1085 - Optimize `LESS_USED` worker choice strategy.
1086 - Update benchmark versus external threads pools.
1087 - Optimize tasks usage statistics requirements for worker choice strategy.
1091 - Ensure trimmable characters are checked at pool initialization.
1092 - Fix message id integer overflow.
1093 - Fix pool worker removal in worker choice strategy internals.
1094 - Fix package publication with pnpm.
1096 ## [2.4.0-3] - 2023-04-04
1100 - Add `LESS_BUSY` worker choice strategy.
1104 - Optimize worker storage in pool.
1105 - Optimize worker alive status check.
1106 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1107 - Optimize `LESS_USED` worker choice strategy.
1108 - Update benchmark versus external threads pools.
1112 - Ensure trimmable characters are checked at pool initialization.
1113 - Fix message id integer overflow.
1114 - Fix pool worker removal in worker choice strategy internals.
1115 - Fix package publication with pnpm.
1117 ## [2.4.0-2] - 2023-04-03
1121 - Add `LESS_BUSY` worker choice strategy.
1125 - Optimize worker storage in pool.
1126 - Optimize worker alive status check.
1127 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1128 - Optimize `LESS_USED` worker choice strategy.
1132 - Ensure trimmable characters are checked at pool initialization.
1133 - Fix message id integer overflow.
1134 - Fix pool worker removal in worker choice strategy internals.
1135 - Fix package publication with pnpm.
1137 ## [2.4.0-1] - 2023-04-03
1141 - Add `LESS_BUSY` worker choice strategy.
1145 - Optimize worker storage in pool.
1146 - Optimize worker alive status check.
1147 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1148 - Optimize `LESS_USED` worker choice strategy.
1152 - Ensure trimmable characters are checked at pool initialization.
1153 - Fix message id integer overflow.
1154 - Fix pool worker removal in worker choice strategy internals.
1156 ## [2.4.0-0] - 2023-04-03
1160 - Add `LESS_BUSY` worker choice strategy.
1164 - Optimize worker storage in pool.
1165 - Optimize worker alive status check.
1166 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1167 - Optimize `LESS_USED` worker choice strategy.
1171 - Ensure trimmable characters are checked at pool initialization.
1172 - Fix message id integer overflow.
1173 - Fix pool worker removal in worker choice strategy internals.
1175 ## [2.3.10] - 2023-03-18
1179 - Fix package.json `exports` syntax for ESM and CommonJS.
1183 - Permit SemVer pre-release publication.
1185 ## [2.3.10-2] - 2023-03-18
1189 - Fix package.json `exports` syntax for ESM and CommonJS.
1191 ## [2.3.10-1] - 2023-03-18
1195 - Permit SemVer pre-release publication.
1197 ## [2.3.10-0] - 2023-03-18
1201 - Fix package.json `exports` syntax for ESM and CommonJS.
1203 ## [2.3.9] - 2023-03-18
1207 - Introduce ESM module support along with CommonJS one.
1211 - Fix brown paper bag bug referencing the same object literal.
1213 ## [2.3.8] - 2023-03-18
1217 - Switch internal benchmarking code to benny.
1218 - Switch to TypeScript 5.x.x.
1219 - Switch rollup bundler plugins to core ones.
1220 - Switch to TSDoc syntax.
1221 - Enforce conventional commits.
1225 - Fix random integer generator.
1226 - Fix worker choice strategy pool type identification at initialization.
1228 ## [2.3.7] - 2022-10-23
1232 - Switch to open collective FOSS project funding platform.
1233 - Switch to ts-standard linter configuration on TypeScript code.
1237 - Fixed missing async on pool execute method.
1238 - Fixed typing in TypeScript example.
1239 - Fixed types in unit tests.
1241 ## [2.3.6] - 2022-10-22
1245 - Cleanup pool attributes and methods.
1246 - Refine error types thrown.
1250 - Fix continuous integration build on windows.
1251 - Fix code coverage reporting by using c8 instead of nyc.
1253 ## [2.3.5] - 2022-10-21
1257 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
1258 - Optimize tasks usage lookup implementation.
1262 - Fix missed pool event emitter type export.
1263 - Fix typedoc documentation generation.
1265 ## [2.3.4] - 2022-10-17
1269 - Fully automate release process with release-it.
1273 - Optimize fair share task scheduling algorithm implementation.
1274 - Update benchmark versus external pools results with latest version.
1276 ## [2.3.3] - 2022-10-15
1280 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
1282 ## [2.3.2] - 2022-10-14
1286 - Optimize fair share worker selection strategy implementation.
1290 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
1292 ## [2.3.1] - 2022-10-13
1296 - Pool worker choice strategies:
1297 - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
1298 - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
1300 ## [2.2.2] - 2022-10-09
1304 - Fixed `README.md` file.
1306 ## [2.2.1] - 2022-10-08
1310 - Dynamic worker choice strategy change at runtime.
1312 ## [2.2.0] - 2022-01-05
1314 ### Breaking Changes
1316 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
1318 ## [2.1.0] - 2021-08-29
1322 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
1324 ### Breaking Changes
1326 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
1327 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
1328 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
1329 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
1331 ## [2.0.2] - 2021-05-12
1335 - Fix `busy` event emission on fixed pool type
1337 ## [2.0.1] - 2021-03-16
1341 - Check if pool options are properly set.
1342 - `busy` event is emitted on all pool types.
1344 ## [2.0.0] - 2021-03-01
1348 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1350 ### Breaking Changes
1352 - `FullPool` event is now renamed to `busy`.
1353 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1354 _Find more details on our JSDoc._
1356 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1358 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1360 ### Pool options types declaration merge
1362 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1364 #### New `export` strategy
1368 const DynamicThreadPool = require('poolifier/lib/dynamic')
1370 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1373 But you should always prefer just using
1376 const { DynamicThreadPool } = require('poolifier')
1379 #### New type definitions for input data and response
1381 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1382 _This is not a limitation by poolifier but Node.js._
1384 #### Public property replacements
1386 `numWorkers` property is now `numberOfWorkers`
1388 #### Internal (protected) properties and methods renaming
1390 These properties are not intended for end users
1392 - `id` => `nextMessageId`
1394 These methods are not intended for end users
1396 - `_chooseWorker` => `chooseWorker`
1397 - `_newWorker` => `createWorker`
1398 - `_execute` => `internalExecute`
1399 - `_chooseWorker` => `chooseWorker`
1400 - `_checkAlive` => `checkAlive`
1402 - `_runAsync` => `runAsync`
1404 ## [1.1.0] - 2020-05-21
1408 - ThreadWorker support async functions as option
1409 - Various external library patches
1411 ## [1.0.0] - 2020-01-24
1415 - FixedThreadPool implementation
1416 - DynamicThreadPool implementation
1417 - WorkerThread implementation to improve developer experience