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 ## [3.1.29] - 2024-04-02
14 - Fix possible race condition at worker node recreation on worker `error` and `exit` events.
16 ## [3.1.28] - 2024-04-01
20 - Ensure the minimum number of workers on a started pool is guaranteed.
22 ## [3.1.27] - 2024-03-27
26 - Fix publishing on JSR, take 4.
28 ## [3.1.26] - 2024-03-27
32 - Fix publishing on JSR, take 3.
34 ## [3.1.25] - 2024-03-27
38 - Fix publishing on JSR, take 2.
40 ## [3.1.24] - 2024-03-27
44 - Fix publishing on JSR.
46 ## [3.1.23] - 2024-03-27
52 ## [3.1.22] - 2024-03-15
56 - Fix pool event emitter registered callbacks removal at `destroy()`.
58 ## [3.1.21] - 2024-02-22
62 - Fix null exception regression: [#1496](https://github.com/poolifier/poolifier/issues/1496).
64 ## [3.1.20] - 2024-02-11
68 - Ensure `worker_threads` workers are unreferenced at termination.
70 ## [3.1.19] - 2024-01-16
74 - Fix possible null exception at task finishing handling.
78 - Optimize Deque implementation to improve tasks queueing performance.
80 ## [3.1.18] - 2024-01-06
84 - Fix dynamic pool with minimum number of workers set to zero: [#1748](https://github.com/poolifier/poolifier/issues/1748).
86 ## [3.1.17] - 2024-01-05
90 - Improve performance by clean up unneeded condition checks on hot code paths.
92 ## [3.1.16] - 2024-01-03
96 - Add missing type to TS type definitions.
98 ## [3.1.15] - 2024-01-02
102 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
104 ## [3.1.15-0] - 2024-01-02
108 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
110 ## [3.1.14] - 2024-01-01
114 - Properly handle dynamic pool with zero minimum size.
116 ## [3.1.13] - 2023-12-30
120 - Reduce branching in several hot code paths.
121 - Use faster object cloning implementation.
123 ## [3.1.12] - 2023-12-27
127 - Fix tasks redistribution triggers at pool destroying.
131 - Switch TypeScript module resolution to Node16.
133 ## [3.1.12-0] - 2023-12-27
137 - Fix tasks redistribution triggers at pool destroying.
139 ## [3.1.11] - 2023-12-24
143 - Avoid worker node cross tasks stealing.
144 - Ensure only half the pool worker nodes can steal tasks.
146 ## [3.1.10] - 2023-12-23
150 - Avoid useless branching on pool type.
152 ## [3.1.9] - 2023-12-22
156 - Readd ThreadPoolOptions and ClusterPoolOptions TS type aliases to PoolOptions.
158 ## [3.1.8] - 2023-12-21
162 - Fix default worker weight computation.
163 - Fix possible null exception at pool destroying.
165 ## [3.1.7] - 2023-12-20
169 - Ensure worker choice strategies implementation wait for worker node readiness: [#1748](https://github.com/poolifier/poolifier/issues/1748).
171 ## [3.1.6] - 2023-12-18
175 - Fix pool destroying with tasks queuing enabled.
177 ## [3.1.5] - 2023-12-18
181 - Add queued tasks end timeout support to worker node termination.
183 ## [3.1.4] - 2023-12-18
187 - Make more robust the fix for possible null exception at handling task execution response.
189 ## [3.1.3] - 2023-12-17
193 - Fix possible null exception at handling task execution response.
195 ## [3.1.2] - 2023-12-17
199 - Wait for queued tasks to end at worker node termination.
201 ## [3.1.1] - 2023-12-16
205 - Fix pool options TS type definition.
207 ## [3.1.0] - 2023-12-16
211 - TypeScript breaking change: merge ThreadPoolOptions and ClusterPoolOptions types into PoolOptions type.
213 ## [3.0.14] - 2023-12-13
217 - Fix possible null exception with worker_threads pools.
219 ## [3.0.13] - 2023-12-12
223 - Ensure worker choice strategy wait for worker nodes readiness.
227 - Remove infinite retries support in worker choice strategy to avoid configuration leading to possible infinite recursion or loop.
229 ## [3.0.12] - 2023-12-12
233 - Add infinite retries support in worker choice strategy.
235 ## [3.0.11] - 2023-12-11
239 - Ensure pool asynchronous resource properly track tasks execution.
241 ## [3.0.10] - 2023-12-08
245 - Add a fastpath when tasks stealing or redistribution is impossible.
247 ## [3.0.9] - 2023-11-26
251 - Remove all pool events listener at pool destroying.
252 - Remove all worker node events listener at worker node destroying.
253 - Fix worker node event emitter listeners handling memory leak at pool options runtime change.
255 ## [3.0.8] - 2023-11-25
259 - Ensure continuous tasks stealing on idle start at worker node idling.
261 ## [3.0.7] - 2023-11-24
265 - Make continuous tasks stealing start at worker node idling.
267 ## [3.0.6] - 2023-11-24
271 - Ensure pool statuses are checked at initialization, `start()` or `destroy()`.
272 - Ensure pool `ready` event can be emitted after several `start()/destroy()` cycles.
274 ## [3.0.5] - 2023-10-27
278 - Ensure pool `ready` event can be emitted only once.
280 ## [3.0.4] - 2023-10-20
284 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
285 - Use builtin retry mechanism in worker choice strategies instead of custom one.
287 ## [3.0.3] - 2023-10-19
291 - Avoid null exception at sending message to worker.
292 - Avoid null exception at checking worker node readiness.
294 ## [3.0.2] - 2023-10-17
298 - 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).
300 ## [3.0.1] - 2023-10-16
304 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
308 - Switch the worker node eventing code to `EventTarget` API.
310 ## [3.0.0] - 2023-10-08
314 - Remove Node.js 16.x.x (EOL) support.
316 ## [2.7.5] - 2023-10-03
320 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
322 ## [2.7.4] - 2023-09-25
326 - Fix source maps (bundler issue).
328 ## [2.7.3] - 2023-09-24
332 - Convert pool event emitter to event emitter async resource.
334 ## [2.7.2] - 2023-09-23
338 - Add source maps to npm package to ease debugging.
342 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
344 ## [2.7.1] - 2023-09-20
348 - Ensure worker message listener used one time are removed after usage.
350 ## [2.7.0] - 2023-09-19
354 - Fix task stealing related tasks queue options handling at runtime.
358 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
362 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
363 - Stricter worker constructor arguments validation.
365 ## [2.6.45] - 2023-09-17
369 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
373 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
374 - Add `start()` method to pool API to start the minimum number of workers.
375 - 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.
376 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
378 ## [2.6.44] - 2023-09-08
382 - Use a dedicated PAT to publish on GitHub packages registry.
386 - Publish on GitHub packages registry on release.
390 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
392 ## [2.6.43] - 2023-09-08
396 - Publish on GitHub packages registry on release.
400 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
402 ## [2.6.42] - 2023-09-06
406 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
408 ## [2.6.41] - 2023-09-03
412 - Optimize worker choice strategies implementation.
414 ## [2.6.40] - 2023-09-01
418 - Do not pre-choose in WRR worker choice strategy to avoid bias.
419 - Avoid array out of bound in worker choice strategies after worker node removal.
421 ## [2.6.39] - 2023-08-30
425 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
427 ## [2.6.38] - 2023-08-30
431 - Bundle typescript types declaration into one file.
435 - Improve interleaved weighted round robin worker choice strategy implementation.
437 ## [2.6.37] - 2023-08-28
441 - Ensure unused worker usage statistics are deleted at runtime.
445 - Rename worker choice strategy options `choiceRetries` to `retries`.
446 - Avoid unnecessary branching in worker choice strategies.
448 ## [2.6.36] - 2023-08-27
452 - Fix pool `execute()` arguments check.
456 - Make continuous tasks stealing algorithm less aggressive.
457 - Fine tune tasks stealing algorithm under back pressure.
459 ## [2.6.35] - 2023-08-25
463 - Don't account worker usage statistics for tasks that have failed.
464 - Fix pool information runtime and wait time median computation.
468 - Update simple moving average implementation to use a circular buffer.
469 - Update simple moving median implementation to use a circular buffer.
470 - Account for stolen tasks in worker usage statistics and pool information.
474 - Continuous tasks stealing algorithm.
476 ## [2.6.34] - 2023-08-24
480 - Avoid cascading tasks stealing under back pressure.
484 - Add fastpath to queued tasks rescheduling.
486 ## [2.6.33] - 2023-08-24
490 - Fix queued tasks rescheduling.
494 - Rename tasks queue options `queueMaxSize` to `size`.
498 - Task stealing scheduling algorithm if tasks queueing is enabled.
500 ## [2.6.32] - 2023-08-23
504 - Ensure no task can be executed when the pool is destroyed.
508 - Add `queueMaxSize` option to tasks queue options.
509 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
510 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
512 ## [2.6.31] - 2023-08-20
516 - Fix worker choice strategy retries mechanism in some edge cases.
520 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
521 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
523 ## [2.6.30] - 2023-08-19
527 - Ensure pool event `backPressure` is emitted.
528 - Ensure pool event `full` is emitted only once.
529 - Ensure worker node cannot be instantiated without proper arguments.
531 ## [2.6.29] - 2023-08-18
535 - Fix race condition between readiness and task functions worker message handling at startup.
536 - Fix duplicate task function worker usage statistics computation per task function.
537 - Update task function worker usage statistics if and only if there's at least two different task functions.
538 - Fix race condition at task function worker usage executing task computation leading to negative value.
542 - 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).
543 - Use back pressure detection in worker choice strategies.
544 - Add worker choice strategies retries mechanism if no worker is eligible.
546 ## [2.6.28] - 2023-08-16
550 - Ensure pool workers are properly initialized.
554 - HTTP server pool examples: express-cluster, express-hybrid.
558 - Remove now useless branching in worker hot code path.
560 ## [2.6.27] - 2023-08-15
564 - Add `KillHandler` type definition to exported types.
568 - Add `destroy` event to pool API.
570 ## [2.6.26] - 2023-08-15
574 - Add kill handler to worker options allowing to execute custom code when worker is killed.
575 - Add `listTaskFunctions()` method to pool API.
576 - SMTP client pool example: nodemailer.
578 ## [2.6.25] - 2023-08-13
582 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
583 - WebSocket server pool examples: ws-cluster, ws-hybrid.
585 ## [2.6.24] - 2023-08-12
589 - Add array of transferable objects to the `execute()` method arguments.
590 - WebSocket server pool examples: ws-worker_threads.
592 ## [2.6.23] - 2023-08-11
596 - 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.
600 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
601 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
603 ## [2.6.22] - 2023-08-10
607 - Add missing `types` field to package.json `exports`.
611 - Structure markdown documentation (PR #811).
613 ## [2.6.21] - 2023-08-03
617 - Improve code documentation.
618 - Code refactoring and cleanup for better maintainability and readability.
620 ## [2.6.20] - 2023-07-21
624 - Fix queued tasks redistribution on error task execution starvation.
625 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
629 - Drastically reduce lookups by worker in the worker nodes.
631 ## [2.6.19] - 2023-07-20
635 - Dedicated internal communication channel for worker_threads pools.
637 ## [2.6.18] - 2023-07-19
641 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
643 ## [2.6.17] - 2023-07-16
647 - Add `listTaskFunctions()` method to worker API.
649 ## [2.6.16] - 2023-07-12
653 - Fix pool startup detection.
654 - Fix worker task functions handling.
656 ## [2.6.15] - 2023-07-11
660 - Take into account worker node readiness in worker choice strategies.
662 ## [2.6.14] - 2023-07-10
666 - Fix task function statistics tracking.
668 ## [2.6.13] - 2023-07-10
672 - Add per task function statistics tracking.
673 - Add public methods to manipulate the worker task functions at runtime.
675 ## [2.6.12] - 2023-07-09
679 - Workaround import issue with `node:os` module in node 16.x.x.
681 ## [2.6.11] - 2023-07-09
685 - Fix pool readiness semantic.
687 ## [2.6.10] - 2023-07-08
691 - Ensure workers are not recreated on error at pool startup.
695 - Add `ready` and `strategy` fields to pool information.
696 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
697 - Add dynamic pool sizing checks.
699 ## [2.6.9] - 2023-07-07
703 - Recreate the right worker type on uncaught exception.
707 - Add minimum and maximum to internal measurement statistics.
708 - Add `runTime` and `waitTime` to pool information.
709 - Check worker inactive time only on dynamic worker.
711 ## [2.6.8] - 2023-07-03
715 - Brown paper bag release to fix version handling in pool information.
717 ## [2.6.7] - 2023-07-03
721 - Ensure worker queued tasks at error are reassigned to other pool workers.
725 - Add pool `utilization` ratio to pool information.
726 - Add `version` to pool information.
727 - Add worker information to worker nodes.
729 ## [2.6.6] - 2023-07-01
733 - Add safe helper `availableParallelism()` to help sizing the pool.
737 - Ensure message handler is only registered in worker.
739 ## [2.6.5] - 2023-06-27
743 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
747 - Artificial version bump to 2.6.5 to workaround publication issue.
748 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
749 - Ensure pool event is emitted before task error promise rejection.
750 - Fix queued tasks count computation.
754 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
756 ## [2.6.4] - 2023-06-27
760 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
764 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
765 - Ensure pool event is emitted before task error promise rejection.
766 - Fix queued tasks count computation.
770 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
772 ## [2.6.3] - 2023-06-19
776 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
777 - Update strategies internals after statistics computation.
781 - Optimize O(1) queue implementation.
783 ## [2.6.2] - 2023-06-12
787 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
789 ## [2.6.1] - 2023-06-10
793 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
797 - Fix average statistics computation: ensure failed tasks are not accounted.
799 ## [2.6.0] - 2023-06-09
803 - Add `LEAST_ELU` worker choice strategy (experimental).
804 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
808 - Refactor pool worker node usage internals.
809 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
810 - Breaking change: pool information `info` property object fields have been renamed.
814 - Fix wait time accounting.
815 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
816 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
818 ## [2.5.4] - 2023-06-07
822 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
826 - Compute statistics at the worker level only if needed.
827 - Add `worker_threads` options to thread pool options.
831 - Make the `LEAST_BUSY` strategy only relies on task runtime.
833 ## [2.5.3] - 2023-06-04
837 - Refine pool information content.
838 - Limit pool internals public exposure.
840 ## [2.5.2] - 2023-06-02
844 - Add `taskError` pool event for task execution error.
845 - Add pool information `info` property to pool.
846 - Emit pool information on `busy` and `full` pool events.
848 ## [2.5.1] - 2023-06-01
852 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
853 - Add `error` pool event for uncaught worker error.
855 ## [2.5.0] - 2023-05-31
859 - Switch pool event emitter to `EventEmitterAsyncResource`.
860 - Add tasks wait time accounting in per worker tasks usage.
861 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
865 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
867 ## [2.4.14] - 2023-05-09
871 - Ensure no undefined task runtime can land in the tasks history.
872 - Fix median computation implementation once again.
876 - Unit tests for median and queue implementations.
878 ## [2.4.13] - 2023-05-08
882 - Fix worker choice strategy options validation.
883 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
885 ## [2.4.12] - 2023-05-06
889 - Support multiple task functions per worker.
890 - Add custom worker weights support to worker choice strategies options.
894 - Use O(1) queue implementation for tasks queueing.
898 - Fix median computation implementation.
899 - Fix fair share worker choice strategy internals update.
901 ## [2.4.11] - 2023-04-23
905 - Optimize free worker finding in worker choice strategies.
907 ## [2.4.10] - 2023-04-15
911 - Fix typescript type definition for task function: ensure the input data is optional.
912 - Fix typescript type definition for pool execute(): ensure the input data is optional.
914 ## [2.4.9] - 2023-04-15
918 - Add tasks queue enablement runtime setter to pool.
919 - Add tasks queue options runtime setter to pool.
920 - Add worker choice strategy options runtime setter to pool.
924 - Remove the tasks queuing experimental status.
928 - Fix task function type definition and validation.
929 - Fix worker choice strategy options handling.
931 ## [2.4.8] - 2023-04-12
935 - Fix message between main worker and worker type definition for tasks.
936 - Fix code documentation.
938 ## [2.4.7] - 2023-04-11
942 - Add worker tasks queue options to pool options.
946 - Fix missing documentation.
948 ## [2.4.6] - 2023-04-10
952 - Ensure one task at a time is executed per worker with tasks queueing enabled.
953 - Properly count worker executing tasks with tasks queueing enabled.
955 ## [2.4.5] - 2023-04-09
959 - Use monotonic high resolution timer for worker tasks runtime.
960 - Add worker tasks median runtime to statistics.
961 - Add worker tasks queue (experimental).
963 ## [2.4.4] - 2023-04-07
967 - Add `PoolEvents` enumeration and `PoolEvent` type.
971 - Destroy worker only on alive check.
973 ## [2.4.3] - 2023-04-07
977 - Fix typedoc generation with inheritance.
979 ## [2.4.2] - 2023-04-06
983 - Add `full` event to dynamic pool.
984 - Keep worker choice strategy in memory for conditional reuse.
988 - Fix possible negative worker key at worker removal in worker choice strategies.
990 ## [2.4.1] - 2023-04-05
994 - Optimize worker choice strategy for dynamic pool.
998 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
1000 ## [2.4.0] - 2023-04-04
1004 - Add `LESS_BUSY` worker choice strategy.
1008 - Optimize worker storage in pool.
1009 - Optimize worker alive status check.
1010 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1011 - Optimize `LESS_USED` worker choice strategy.
1012 - Update benchmark versus external threads pools.
1013 - Optimize tasks usage statistics requirements for worker choice strategy.
1017 - Ensure trimmable characters are checked at pool initialization.
1018 - Fix message id integer overflow.
1019 - Fix pool worker removal in worker choice strategy internals.
1020 - Fix package publication with pnpm.
1022 ## [2.4.0-3] - 2023-04-04
1026 - Add `LESS_BUSY` worker choice strategy.
1030 - Optimize worker storage in pool.
1031 - Optimize worker alive status check.
1032 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1033 - Optimize `LESS_USED` worker choice strategy.
1034 - Update benchmark versus external threads pools.
1038 - Ensure trimmable characters are checked at pool initialization.
1039 - Fix message id integer overflow.
1040 - Fix pool worker removal in worker choice strategy internals.
1041 - Fix package publication with pnpm.
1043 ## [2.4.0-2] - 2023-04-03
1047 - Add `LESS_BUSY` worker choice strategy.
1051 - Optimize worker storage in pool.
1052 - Optimize worker alive status check.
1053 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1054 - Optimize `LESS_USED` worker choice strategy.
1058 - Ensure trimmable characters are checked at pool initialization.
1059 - Fix message id integer overflow.
1060 - Fix pool worker removal in worker choice strategy internals.
1061 - Fix package publication with pnpm.
1063 ## [2.4.0-1] - 2023-04-03
1067 - Add `LESS_BUSY` worker choice strategy.
1071 - Optimize worker storage in pool.
1072 - Optimize worker alive status check.
1073 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1074 - Optimize `LESS_USED` worker choice strategy.
1078 - Ensure trimmable characters are checked at pool initialization.
1079 - Fix message id integer overflow.
1080 - Fix pool worker removal in worker choice strategy internals.
1082 ## [2.4.0-0] - 2023-04-03
1086 - Add `LESS_BUSY` worker choice strategy.
1090 - Optimize worker storage in pool.
1091 - Optimize worker alive status check.
1092 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1093 - Optimize `LESS_USED` worker choice strategy.
1097 - Ensure trimmable characters are checked at pool initialization.
1098 - Fix message id integer overflow.
1099 - Fix pool worker removal in worker choice strategy internals.
1101 ## [2.3.10] - 2023-03-18
1105 - Fix package.json `exports` syntax for ESM and CommonJS.
1109 - Permit SemVer pre-release publication.
1111 ## [2.3.10-2] - 2023-03-18
1115 - Fix package.json `exports` syntax for ESM and CommonJS.
1117 ## [2.3.10-1] - 2023-03-18
1121 - Permit SemVer pre-release publication.
1123 ## [2.3.10-0] - 2023-03-18
1127 - Fix package.json `exports` syntax for ESM and CommonJS.
1129 ## [2.3.9] - 2023-03-18
1133 - Introduce ESM module support along with CommonJS one.
1137 - Fix brown paper bag bug referencing the same object literal.
1139 ## [2.3.8] - 2023-03-18
1143 - Switch internal benchmarking code to benny.
1144 - Switch to TypeScript 5.x.x.
1145 - Switch rollup bundler plugins to core ones.
1146 - Switch to TSDoc syntax.
1147 - Enforce conventional commits.
1151 - Fix random integer generator.
1152 - Fix worker choice strategy pool type identification at initialization.
1154 ## [2.3.7] - 2022-10-23
1158 - Switch to open collective FOSS project funding platform.
1159 - Switch to ts-standard linter configuration on TypeScript code.
1163 - Fixed missing async on pool execute method.
1164 - Fixed typing in TypeScript example.
1165 - Fixed types in unit tests.
1167 ## [2.3.6] - 2022-10-22
1171 - Cleanup pool attributes and methods.
1172 - Refine error types thrown.
1176 - Fix continuous integration build on windows.
1177 - Fix code coverage reporting by using c8 instead of nyc.
1179 ## [2.3.5] - 2022-10-21
1183 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
1184 - Optimize tasks usage lookup implementation.
1188 - Fix missed pool event emitter type export.
1189 - Fix typedoc documentation generation.
1191 ## [2.3.4] - 2022-10-17
1195 - Fully automate release process with release-it.
1199 - Optimize fair share task scheduling algorithm implementation.
1200 - Update benchmark versus external pools results with latest version.
1202 ## [2.3.3] - 2022-10-15
1206 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
1208 ## [2.3.2] - 2022-10-14
1212 - Optimize fair share worker selection strategy implementation.
1216 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
1218 ## [2.3.1] - 2022-10-13
1222 - Pool worker choice strategies:
1223 - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
1224 - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
1226 ## [2.2.2] - 2022-10-09
1230 - Fixed `README.md` file.
1232 ## [2.2.1] - 2022-10-08
1236 - Dynamic worker choice strategy change at runtime.
1238 ## [2.2.0] - 2022-01-05
1240 ### Breaking Changes
1242 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
1244 ## [2.1.0] - 2021-08-29
1248 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
1250 ### Breaking Changes
1252 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
1253 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
1254 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
1255 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
1257 ## [2.0.2] - 2021-05-12
1261 - Fix `busy` event emission on fixed pool type
1263 ## [2.0.1] - 2021-03-16
1267 - Check if pool options are properly set.
1268 - `busy` event is emitted on all pool types.
1270 ## [2.0.0] - 2021-03-01
1274 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1276 ### Breaking Changes
1278 - `FullPool` event is now renamed to `busy`.
1279 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1280 _Find more details on our JSDoc._
1282 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1284 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1286 ### Pool options types declaration merge
1288 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1290 #### New `export` strategy
1294 const DynamicThreadPool = require('poolifier/lib/dynamic')
1296 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1299 But you should always prefer just using
1302 const { DynamicThreadPool } = require('poolifier')
1305 #### New type definitions for input data and response
1307 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1308 _This is not a limitation by poolifier but Node.js._
1310 #### Public property replacements
1312 `numWorkers` property is now `numberOfWorkers`
1314 #### Internal (protected) properties and methods renaming
1316 These properties are not intended for end users
1318 - `id` => `nextMessageId`
1320 These methods are not intended for end users
1322 - `_chooseWorker` => `chooseWorker`
1323 - `_newWorker` => `createWorker`
1324 - `_execute` => `internalExecute`
1325 - `_chooseWorker` => `chooseWorker`
1326 - `_checkAlive` => `checkAlive`
1328 - `_runAsync` => `runAsync`
1330 ## [1.1.0] - 2020-05-21
1334 - ThreadWorker support async functions as option
1335 - Various external library patches
1337 ## [1.0.0] - 2020-01-24
1341 - FixedThreadPool implementation
1342 - DynamicThreadPool implementation
1343 - WorkerThread implementation to improve developer experience