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 ## [3.1.30] - 2024-04-22
14 - Fix `transferList` argument type definition.
16 ## [3.1.29] - 2024-04-02
20 - Fix possible race condition at worker node recreation on worker `error` and `exit` events.
22 ## [3.1.28] - 2024-04-01
26 - Ensure the minimum number of workers on a started pool is guaranteed.
28 ## [3.1.27] - 2024-03-27
32 - Fix publishing on JSR, take 4.
34 ## [3.1.26] - 2024-03-27
38 - Fix publishing on JSR, take 3.
40 ## [3.1.25] - 2024-03-27
44 - Fix publishing on JSR, take 2.
46 ## [3.1.24] - 2024-03-27
50 - Fix publishing on JSR.
52 ## [3.1.23] - 2024-03-27
58 ## [3.1.22] - 2024-03-15
62 - Fix pool event emitter registered callbacks removal at `destroy()`.
64 ## [3.1.21] - 2024-02-22
68 - Fix null exception regression: [#1496](https://github.com/poolifier/poolifier/issues/1496).
70 ## [3.1.20] - 2024-02-11
74 - Ensure `worker_threads` workers are unreferenced at termination.
76 ## [3.1.19] - 2024-01-16
80 - Fix possible null exception at task finishing handling.
84 - Optimize Deque implementation to improve tasks queueing performance.
86 ## [3.1.18] - 2024-01-06
90 - Fix dynamic pool with minimum number of workers set to zero: [#1748](https://github.com/poolifier/poolifier/issues/1748).
92 ## [3.1.17] - 2024-01-05
96 - Improve performance by clean up unneeded condition checks on hot code paths.
98 ## [3.1.16] - 2024-01-03
102 - Add missing type to TS type definitions.
104 ## [3.1.15] - 2024-01-02
108 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
110 ## [3.1.15-0] - 2024-01-02
114 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
116 ## [3.1.14] - 2024-01-01
120 - Properly handle dynamic pool with zero minimum size.
122 ## [3.1.13] - 2023-12-30
126 - Reduce branching in several hot code paths.
127 - Use faster object cloning implementation.
129 ## [3.1.12] - 2023-12-27
133 - Fix tasks redistribution triggers at pool destroying.
137 - Switch TypeScript module resolution to Node16.
139 ## [3.1.12-0] - 2023-12-27
143 - Fix tasks redistribution triggers at pool destroying.
145 ## [3.1.11] - 2023-12-24
149 - Avoid worker node cross tasks stealing.
150 - Ensure only half the pool worker nodes can steal tasks.
152 ## [3.1.10] - 2023-12-23
156 - Avoid useless branching on pool type.
158 ## [3.1.9] - 2023-12-22
162 - Readd ThreadPoolOptions and ClusterPoolOptions TS type aliases to PoolOptions.
164 ## [3.1.8] - 2023-12-21
168 - Fix default worker weight computation.
169 - Fix possible null exception at pool destroying.
171 ## [3.1.7] - 2023-12-20
175 - Ensure worker choice strategies implementation wait for worker node readiness: [#1748](https://github.com/poolifier/poolifier/issues/1748).
177 ## [3.1.6] - 2023-12-18
181 - Fix pool destroying with tasks queuing enabled.
183 ## [3.1.5] - 2023-12-18
187 - Add queued tasks end timeout support to worker node termination.
189 ## [3.1.4] - 2023-12-18
193 - Make more robust the fix for possible null exception at handling task execution response.
195 ## [3.1.3] - 2023-12-17
199 - Fix possible null exception at handling task execution response.
201 ## [3.1.2] - 2023-12-17
205 - Wait for queued tasks to end at worker node termination.
207 ## [3.1.1] - 2023-12-16
211 - Fix pool options TS type definition.
213 ## [3.1.0] - 2023-12-16
217 - TypeScript breaking change: merge ThreadPoolOptions and ClusterPoolOptions types into PoolOptions type.
219 ## [3.0.14] - 2023-12-13
223 - Fix possible null exception with worker_threads pools.
225 ## [3.0.13] - 2023-12-12
229 - Ensure worker choice strategy wait for worker nodes readiness.
233 - Remove infinite retries support in worker choice strategy to avoid configuration leading to possible infinite recursion or loop.
235 ## [3.0.12] - 2023-12-12
239 - Add infinite retries support in worker choice strategy.
241 ## [3.0.11] - 2023-12-11
245 - Ensure pool asynchronous resource properly track tasks execution.
247 ## [3.0.10] - 2023-12-08
251 - Add a fastpath when tasks stealing or redistribution is impossible.
253 ## [3.0.9] - 2023-11-26
257 - Remove all pool events listener at pool destroying.
258 - Remove all worker node events listener at worker node destroying.
259 - Fix worker node event emitter listeners handling memory leak at pool options runtime change.
261 ## [3.0.8] - 2023-11-25
265 - Ensure continuous tasks stealing on idle start at worker node idling.
267 ## [3.0.7] - 2023-11-24
271 - Make continuous tasks stealing start at worker node idling.
273 ## [3.0.6] - 2023-11-24
277 - Ensure pool statuses are checked at initialization, `start()` or `destroy()`.
278 - Ensure pool `ready` event can be emitted after several `start()/destroy()` cycles.
280 ## [3.0.5] - 2023-10-27
284 - Ensure pool `ready` event can be emitted only once.
286 ## [3.0.4] - 2023-10-20
290 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
291 - Use builtin retry mechanism in worker choice strategies instead of custom one.
293 ## [3.0.3] - 2023-10-19
297 - Avoid null exception at sending message to worker.
298 - Avoid null exception at checking worker node readiness.
300 ## [3.0.2] - 2023-10-17
304 - 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).
306 ## [3.0.1] - 2023-10-16
310 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
314 - Switch the worker node eventing code to `EventTarget` API.
316 ## [3.0.0] - 2023-10-08
320 - Remove Node.js 16.x.x (EOL) support.
322 ## [2.7.5] - 2023-10-03
326 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
328 ## [2.7.4] - 2023-09-25
332 - Fix source maps (bundler issue).
334 ## [2.7.3] - 2023-09-24
338 - Convert pool event emitter to event emitter async resource.
340 ## [2.7.2] - 2023-09-23
344 - Add source maps to npm package to ease debugging.
348 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
350 ## [2.7.1] - 2023-09-20
354 - Ensure worker message listener used one time are removed after usage.
356 ## [2.7.0] - 2023-09-19
360 - Fix task stealing related tasks queue options handling at runtime.
364 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
368 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
369 - Stricter worker constructor arguments validation.
371 ## [2.6.45] - 2023-09-17
375 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
379 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
380 - Add `start()` method to pool API to start the minimum number of workers.
381 - 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.
382 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
384 ## [2.6.44] - 2023-09-08
388 - Use a dedicated PAT to publish on GitHub packages registry.
392 - Publish on GitHub packages registry on release.
396 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
398 ## [2.6.43] - 2023-09-08
402 - Publish on GitHub packages registry on release.
406 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
408 ## [2.6.42] - 2023-09-06
412 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
414 ## [2.6.41] - 2023-09-03
418 - Optimize worker choice strategies implementation.
420 ## [2.6.40] - 2023-09-01
424 - Do not pre-choose in WRR worker choice strategy to avoid bias.
425 - Avoid array out of bound in worker choice strategies after worker node removal.
427 ## [2.6.39] - 2023-08-30
431 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
433 ## [2.6.38] - 2023-08-30
437 - Bundle typescript types declaration into one file.
441 - Improve interleaved weighted round robin worker choice strategy implementation.
443 ## [2.6.37] - 2023-08-28
447 - Ensure unused worker usage statistics are deleted at runtime.
451 - Rename worker choice strategy options `choiceRetries` to `retries`.
452 - Avoid unnecessary branching in worker choice strategies.
454 ## [2.6.36] - 2023-08-27
458 - Fix pool `execute()` arguments check.
462 - Make continuous tasks stealing algorithm less aggressive.
463 - Fine tune tasks stealing algorithm under back pressure.
465 ## [2.6.35] - 2023-08-25
469 - Don't account worker usage statistics for tasks that have failed.
470 - Fix pool information runtime and wait time median computation.
474 - Update simple moving average implementation to use a circular buffer.
475 - Update simple moving median implementation to use a circular buffer.
476 - Account for stolen tasks in worker usage statistics and pool information.
480 - Continuous tasks stealing algorithm.
482 ## [2.6.34] - 2023-08-24
486 - Avoid cascading tasks stealing under back pressure.
490 - Add fastpath to queued tasks rescheduling.
492 ## [2.6.33] - 2023-08-24
496 - Fix queued tasks rescheduling.
500 - Rename tasks queue options `queueMaxSize` to `size`.
504 - Task stealing scheduling algorithm if tasks queueing is enabled.
506 ## [2.6.32] - 2023-08-23
510 - Ensure no task can be executed when the pool is destroyed.
514 - Add `queueMaxSize` option to tasks queue options.
515 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
516 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
518 ## [2.6.31] - 2023-08-20
522 - Fix worker choice strategy retries mechanism in some edge cases.
526 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
527 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
529 ## [2.6.30] - 2023-08-19
533 - Ensure pool event `backPressure` is emitted.
534 - Ensure pool event `full` is emitted only once.
535 - Ensure worker node cannot be instantiated without proper arguments.
537 ## [2.6.29] - 2023-08-18
541 - Fix race condition between readiness and task functions worker message handling at startup.
542 - Fix duplicate task function worker usage statistics computation per task function.
543 - Update task function worker usage statistics if and only if there's at least two different task functions.
544 - Fix race condition at task function worker usage executing task computation leading to negative value.
548 - 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).
549 - Use back pressure detection in worker choice strategies.
550 - Add worker choice strategies retries mechanism if no worker is eligible.
552 ## [2.6.28] - 2023-08-16
556 - Ensure pool workers are properly initialized.
560 - HTTP server pool examples: express-cluster, express-hybrid.
564 - Remove now useless branching in worker hot code path.
566 ## [2.6.27] - 2023-08-15
570 - Add `KillHandler` type definition to exported types.
574 - Add `destroy` event to pool API.
576 ## [2.6.26] - 2023-08-15
580 - Add kill handler to worker options allowing to execute custom code when worker is killed.
581 - Add `listTaskFunctions()` method to pool API.
582 - SMTP client pool example: nodemailer.
584 ## [2.6.25] - 2023-08-13
588 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
589 - WebSocket server pool examples: ws-cluster, ws-hybrid.
591 ## [2.6.24] - 2023-08-12
595 - Add array of transferable objects to the `execute()` method arguments.
596 - WebSocket server pool examples: ws-worker_threads.
598 ## [2.6.23] - 2023-08-11
602 - 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.
606 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
607 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
609 ## [2.6.22] - 2023-08-10
613 - Add missing `types` field to package.json `exports`.
617 - Structure markdown documentation (PR #811).
619 ## [2.6.21] - 2023-08-03
623 - Improve code documentation.
624 - Code refactoring and cleanup for better maintainability and readability.
626 ## [2.6.20] - 2023-07-21
630 - Fix queued tasks redistribution on error task execution starvation.
631 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
635 - Drastically reduce lookups by worker in the worker nodes.
637 ## [2.6.19] - 2023-07-20
641 - Dedicated internal communication channel for worker_threads pools.
643 ## [2.6.18] - 2023-07-19
647 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
649 ## [2.6.17] - 2023-07-16
653 - Add `listTaskFunctions()` method to worker API.
655 ## [2.6.16] - 2023-07-12
659 - Fix pool startup detection.
660 - Fix worker task functions handling.
662 ## [2.6.15] - 2023-07-11
666 - Take into account worker node readiness in worker choice strategies.
668 ## [2.6.14] - 2023-07-10
672 - Fix task function statistics tracking.
674 ## [2.6.13] - 2023-07-10
678 - Add per task function statistics tracking.
679 - Add public methods to manipulate the worker task functions at runtime.
681 ## [2.6.12] - 2023-07-09
685 - Workaround import issue with `node:os` module in node 16.x.x.
687 ## [2.6.11] - 2023-07-09
691 - Fix pool readiness semantic.
693 ## [2.6.10] - 2023-07-08
697 - Ensure workers are not recreated on error at pool startup.
701 - Add `ready` and `strategy` fields to pool information.
702 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
703 - Add dynamic pool sizing checks.
705 ## [2.6.9] - 2023-07-07
709 - Recreate the right worker type on uncaught exception.
713 - Add minimum and maximum to internal measurement statistics.
714 - Add `runTime` and `waitTime` to pool information.
715 - Check worker inactive time only on dynamic worker.
717 ## [2.6.8] - 2023-07-03
721 - Brown paper bag release to fix version handling in pool information.
723 ## [2.6.7] - 2023-07-03
727 - Ensure worker queued tasks at error are reassigned to other pool workers.
731 - Add pool `utilization` ratio to pool information.
732 - Add `version` to pool information.
733 - Add worker information to worker nodes.
735 ## [2.6.6] - 2023-07-01
739 - Add safe helper `availableParallelism()` to help sizing the pool.
743 - Ensure message handler is only registered in worker.
745 ## [2.6.5] - 2023-06-27
749 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
753 - Artificial version bump to 2.6.5 to workaround publication issue.
754 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
755 - Ensure pool event is emitted before task error promise rejection.
756 - Fix queued tasks count computation.
760 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
762 ## [2.6.4] - 2023-06-27
766 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
770 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
771 - Ensure pool event is emitted before task error promise rejection.
772 - Fix queued tasks count computation.
776 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
778 ## [2.6.3] - 2023-06-19
782 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
783 - Update strategies internals after statistics computation.
787 - Optimize O(1) queue implementation.
789 ## [2.6.2] - 2023-06-12
793 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
795 ## [2.6.1] - 2023-06-10
799 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
803 - Fix average statistics computation: ensure failed tasks are not accounted.
805 ## [2.6.0] - 2023-06-09
809 - Add `LEAST_ELU` worker choice strategy (experimental).
810 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
814 - Refactor pool worker node usage internals.
815 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
816 - Breaking change: pool information `info` property object fields have been renamed.
820 - Fix wait time accounting.
821 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
822 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
824 ## [2.5.4] - 2023-06-07
828 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
832 - Compute statistics at the worker level only if needed.
833 - Add `worker_threads` options to thread pool options.
837 - Make the `LEAST_BUSY` strategy only relies on task runtime.
839 ## [2.5.3] - 2023-06-04
843 - Refine pool information content.
844 - Limit pool internals public exposure.
846 ## [2.5.2] - 2023-06-02
850 - Add `taskError` pool event for task execution error.
851 - Add pool information `info` property to pool.
852 - Emit pool information on `busy` and `full` pool events.
854 ## [2.5.1] - 2023-06-01
858 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
859 - Add `error` pool event for uncaught worker error.
861 ## [2.5.0] - 2023-05-31
865 - Switch pool event emitter to `EventEmitterAsyncResource`.
866 - Add tasks wait time accounting in per worker tasks usage.
867 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
871 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
873 ## [2.4.14] - 2023-05-09
877 - Ensure no undefined task runtime can land in the tasks history.
878 - Fix median computation implementation once again.
882 - Unit tests for median and queue implementations.
884 ## [2.4.13] - 2023-05-08
888 - Fix worker choice strategy options validation.
889 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
891 ## [2.4.12] - 2023-05-06
895 - Support multiple task functions per worker.
896 - Add custom worker weights support to worker choice strategies options.
900 - Use O(1) queue implementation for tasks queueing.
904 - Fix median computation implementation.
905 - Fix fair share worker choice strategy internals update.
907 ## [2.4.11] - 2023-04-23
911 - Optimize free worker finding in worker choice strategies.
913 ## [2.4.10] - 2023-04-15
917 - Fix typescript type definition for task function: ensure the input data is optional.
918 - Fix typescript type definition for pool execute(): ensure the input data is optional.
920 ## [2.4.9] - 2023-04-15
924 - Add tasks queue enablement runtime setter to pool.
925 - Add tasks queue options runtime setter to pool.
926 - Add worker choice strategy options runtime setter to pool.
930 - Remove the tasks queuing experimental status.
934 - Fix task function type definition and validation.
935 - Fix worker choice strategy options handling.
937 ## [2.4.8] - 2023-04-12
941 - Fix message between main worker and worker type definition for tasks.
942 - Fix code documentation.
944 ## [2.4.7] - 2023-04-11
948 - Add worker tasks queue options to pool options.
952 - Fix missing documentation.
954 ## [2.4.6] - 2023-04-10
958 - Ensure one task at a time is executed per worker with tasks queueing enabled.
959 - Properly count worker executing tasks with tasks queueing enabled.
961 ## [2.4.5] - 2023-04-09
965 - Use monotonic high resolution timer for worker tasks runtime.
966 - Add worker tasks median runtime to statistics.
967 - Add worker tasks queue (experimental).
969 ## [2.4.4] - 2023-04-07
973 - Add `PoolEvents` enumeration and `PoolEvent` type.
977 - Destroy worker only on alive check.
979 ## [2.4.3] - 2023-04-07
983 - Fix typedoc generation with inheritance.
985 ## [2.4.2] - 2023-04-06
989 - Add `full` event to dynamic pool.
990 - Keep worker choice strategy in memory for conditional reuse.
994 - Fix possible negative worker key at worker removal in worker choice strategies.
996 ## [2.4.1] - 2023-04-05
1000 - Optimize worker choice strategy for dynamic pool.
1004 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
1006 ## [2.4.0] - 2023-04-04
1010 - Add `LESS_BUSY` worker choice strategy.
1014 - Optimize worker storage in pool.
1015 - Optimize worker alive status check.
1016 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1017 - Optimize `LESS_USED` worker choice strategy.
1018 - Update benchmark versus external threads pools.
1019 - Optimize tasks usage statistics requirements for worker choice strategy.
1023 - Ensure trimmable characters are checked at pool initialization.
1024 - Fix message id integer overflow.
1025 - Fix pool worker removal in worker choice strategy internals.
1026 - Fix package publication with pnpm.
1028 ## [2.4.0-3] - 2023-04-04
1032 - Add `LESS_BUSY` worker choice strategy.
1036 - Optimize worker storage in pool.
1037 - Optimize worker alive status check.
1038 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1039 - Optimize `LESS_USED` worker choice strategy.
1040 - Update benchmark versus external threads pools.
1044 - Ensure trimmable characters are checked at pool initialization.
1045 - Fix message id integer overflow.
1046 - Fix pool worker removal in worker choice strategy internals.
1047 - Fix package publication with pnpm.
1049 ## [2.4.0-2] - 2023-04-03
1053 - Add `LESS_BUSY` worker choice strategy.
1057 - Optimize worker storage in pool.
1058 - Optimize worker alive status check.
1059 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1060 - Optimize `LESS_USED` worker choice strategy.
1064 - Ensure trimmable characters are checked at pool initialization.
1065 - Fix message id integer overflow.
1066 - Fix pool worker removal in worker choice strategy internals.
1067 - Fix package publication with pnpm.
1069 ## [2.4.0-1] - 2023-04-03
1073 - Add `LESS_BUSY` worker choice strategy.
1077 - Optimize worker storage in pool.
1078 - Optimize worker alive status check.
1079 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1080 - Optimize `LESS_USED` worker choice strategy.
1084 - Ensure trimmable characters are checked at pool initialization.
1085 - Fix message id integer overflow.
1086 - Fix pool worker removal in worker choice strategy internals.
1088 ## [2.4.0-0] - 2023-04-03
1092 - Add `LESS_BUSY` worker choice strategy.
1096 - Optimize worker storage in pool.
1097 - Optimize worker alive status check.
1098 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1099 - Optimize `LESS_USED` worker choice strategy.
1103 - Ensure trimmable characters are checked at pool initialization.
1104 - Fix message id integer overflow.
1105 - Fix pool worker removal in worker choice strategy internals.
1107 ## [2.3.10] - 2023-03-18
1111 - Fix package.json `exports` syntax for ESM and CommonJS.
1115 - Permit SemVer pre-release publication.
1117 ## [2.3.10-2] - 2023-03-18
1121 - Fix package.json `exports` syntax for ESM and CommonJS.
1123 ## [2.3.10-1] - 2023-03-18
1127 - Permit SemVer pre-release publication.
1129 ## [2.3.10-0] - 2023-03-18
1133 - Fix package.json `exports` syntax for ESM and CommonJS.
1135 ## [2.3.9] - 2023-03-18
1139 - Introduce ESM module support along with CommonJS one.
1143 - Fix brown paper bag bug referencing the same object literal.
1145 ## [2.3.8] - 2023-03-18
1149 - Switch internal benchmarking code to benny.
1150 - Switch to TypeScript 5.x.x.
1151 - Switch rollup bundler plugins to core ones.
1152 - Switch to TSDoc syntax.
1153 - Enforce conventional commits.
1157 - Fix random integer generator.
1158 - Fix worker choice strategy pool type identification at initialization.
1160 ## [2.3.7] - 2022-10-23
1164 - Switch to open collective FOSS project funding platform.
1165 - Switch to ts-standard linter configuration on TypeScript code.
1169 - Fixed missing async on pool execute method.
1170 - Fixed typing in TypeScript example.
1171 - Fixed types in unit tests.
1173 ## [2.3.6] - 2022-10-22
1177 - Cleanup pool attributes and methods.
1178 - Refine error types thrown.
1182 - Fix continuous integration build on windows.
1183 - Fix code coverage reporting by using c8 instead of nyc.
1185 ## [2.3.5] - 2022-10-21
1189 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
1190 - Optimize tasks usage lookup implementation.
1194 - Fix missed pool event emitter type export.
1195 - Fix typedoc documentation generation.
1197 ## [2.3.4] - 2022-10-17
1201 - Fully automate release process with release-it.
1205 - Optimize fair share task scheduling algorithm implementation.
1206 - Update benchmark versus external pools results with latest version.
1208 ## [2.3.3] - 2022-10-15
1212 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
1214 ## [2.3.2] - 2022-10-14
1218 - Optimize fair share worker selection strategy implementation.
1222 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
1224 ## [2.3.1] - 2022-10-13
1228 - Pool worker choice strategies:
1229 - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
1230 - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
1232 ## [2.2.2] - 2022-10-09
1236 - Fixed `README.md` file.
1238 ## [2.2.1] - 2022-10-08
1242 - Dynamic worker choice strategy change at runtime.
1244 ## [2.2.0] - 2022-01-05
1246 ### Breaking Changes
1248 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
1250 ## [2.1.0] - 2021-08-29
1254 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
1256 ### Breaking Changes
1258 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
1259 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
1260 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
1261 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
1263 ## [2.0.2] - 2021-05-12
1267 - Fix `busy` event emission on fixed pool type
1269 ## [2.0.1] - 2021-03-16
1273 - Check if pool options are properly set.
1274 - `busy` event is emitted on all pool types.
1276 ## [2.0.0] - 2021-03-01
1280 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1282 ### Breaking Changes
1284 - `FullPool` event is now renamed to `busy`.
1285 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1286 _Find more details on our JSDoc._
1288 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1290 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1292 ### Pool options types declaration merge
1294 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1296 #### New `export` strategy
1300 const DynamicThreadPool = require('poolifier/lib/dynamic')
1302 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1305 But you should always prefer just using
1308 const { DynamicThreadPool } = require('poolifier')
1311 #### New type definitions for input data and response
1313 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1314 _This is not a limitation by poolifier but Node.js._
1316 #### Public property replacements
1318 `numWorkers` property is now `numberOfWorkers`
1320 #### Internal (protected) properties and methods renaming
1322 These properties are not intended for end users
1324 - `id` => `nextMessageId`
1326 These methods are not intended for end users
1328 - `_chooseWorker` => `chooseWorker`
1329 - `_newWorker` => `createWorker`
1330 - `_execute` => `internalExecute`
1331 - `_chooseWorker` => `chooseWorker`
1332 - `_checkAlive` => `checkAlive`
1334 - `_runAsync` => `runAsync`
1336 ## [1.1.0] - 2020-05-21
1340 - ThreadWorker support async functions as option
1341 - Various external library patches
1343 ## [1.0.0] - 2020-01-24
1347 - FixedThreadPool implementation
1348 - DynamicThreadPool implementation
1349 - WorkerThread implementation to improve developer experience