3 All notable changes to this project will be documented in this file.
5 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
6 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
12 - Fix publishing on JSR, take 2.
14 ## [3.1.24] - 2024-03-27
18 - Fix publishing on JSR.
20 ## [3.1.23] - 2024-03-27
26 ## [3.1.22] - 2024-03-15
30 - Fix pool event emitter registered callbacks removal at `destroy()`.
32 ## [3.1.21] - 2024-02-22
36 - Fix null exception regression: [#1496](https://github.com/poolifier/poolifier/issues/1496).
38 ## [3.1.20] - 2024-02-11
42 - Ensure `worker_threads` workers are unreferenced at termination.
44 ## [3.1.19] - 2024-01-16
48 - Fix possible null exception at task finishing handling.
52 - Optimize Deque implementation to improve tasks queueing performance.
54 ## [3.1.18] - 2024-01-06
58 - Fix dynamic pool with minimum number of workers set to zero: [#1748](https://github.com/poolifier/poolifier/issues/1748).
60 ## [3.1.17] - 2024-01-05
64 - Improve performance by clean up unneeded condition checks on hot code paths.
66 ## [3.1.16] - 2024-01-03
70 - Add missing type to TS type definitions.
72 ## [3.1.15] - 2024-01-02
76 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
78 ## [3.1.15-0] - 2024-01-02
82 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
84 ## [3.1.14] - 2024-01-01
88 - Properly handle dynamic pool with zero minimum size.
90 ## [3.1.13] - 2023-12-30
94 - Reduce branching in several hot code paths.
95 - Use faster object cloning implementation.
97 ## [3.1.12] - 2023-12-27
101 - Fix tasks redistribution triggers at pool destroying.
105 - Switch TypeScript module resolution to Node16.
107 ## [3.1.12-0] - 2023-12-27
111 - Fix tasks redistribution triggers at pool destroying.
113 ## [3.1.11] - 2023-12-24
117 - Avoid worker node cross tasks stealing.
118 - Ensure only half the pool worker nodes can steal tasks.
120 ## [3.1.10] - 2023-12-23
124 - Avoid useless branching on pool type.
126 ## [3.1.9] - 2023-12-22
130 - Readd ThreadPoolOptions and ClusterPoolOptions TS type aliases to PoolOptions.
132 ## [3.1.8] - 2023-12-21
136 - Fix default worker weight computation.
137 - Fix possible null exception at pool destroying.
139 ## [3.1.7] - 2023-12-20
143 - Ensure worker choice strategies implementation wait for worker node readiness: [#1748](https://github.com/poolifier/poolifier/issues/1748).
145 ## [3.1.6] - 2023-12-18
149 - Fix pool destroying with tasks queuing enabled.
151 ## [3.1.5] - 2023-12-18
155 - Add queued tasks end timeout support to worker node termination.
157 ## [3.1.4] - 2023-12-18
161 - Make more robust the fix for possible null exception at handling task execution response.
163 ## [3.1.3] - 2023-12-17
167 - Fix possible null exception at handling task execution response.
169 ## [3.1.2] - 2023-12-17
173 - Wait for queued tasks to end at worker node termination.
175 ## [3.1.1] - 2023-12-16
179 - Fix pool options TS type definition.
181 ## [3.1.0] - 2023-12-16
185 - TypeScript breaking change: merge ThreadPoolOptions and ClusterPoolOptions types into PoolOptions type.
187 ## [3.0.14] - 2023-12-13
191 - Fix possible null exception with worker_threads pools.
193 ## [3.0.13] - 2023-12-12
197 - Ensure worker choice strategy wait for worker nodes readiness.
201 - Remove infinite retries support in worker choice strategy to avoid configuration leading to possible infinite recursion or loop.
203 ## [3.0.12] - 2023-12-12
207 - Add infinite retries support in worker choice strategy.
209 ## [3.0.11] - 2023-12-11
213 - Ensure pool asynchronous resource properly track tasks execution.
215 ## [3.0.10] - 2023-12-08
219 - Add a fastpath when tasks stealing or redistribution is impossible.
221 ## [3.0.9] - 2023-11-26
225 - Remove all pool events listener at pool destroying.
226 - Remove all worker node events listener at worker node destroying.
227 - Fix worker node event emitter listeners handling memory leak at pool options runtime change.
229 ## [3.0.8] - 2023-11-25
233 - Ensure continuous tasks stealing on idle start at worker node idling.
235 ## [3.0.7] - 2023-11-24
239 - Make continuous tasks stealing start at worker node idling.
241 ## [3.0.6] - 2023-11-24
245 - Ensure pool statuses are checked at initialization, `start()` or `destroy()`.
246 - Ensure pool `ready` event can be emitted after several `start()/destroy()` cycles.
248 ## [3.0.5] - 2023-10-27
252 - Ensure pool `ready` event can be emitted only once.
254 ## [3.0.4] - 2023-10-20
258 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
259 - Use builtin retry mechanism in worker choice strategies instead of custom one.
261 ## [3.0.3] - 2023-10-19
265 - Avoid null exception at sending message to worker.
266 - Avoid null exception at checking worker node readiness.
268 ## [3.0.2] - 2023-10-17
272 - 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).
274 ## [3.0.1] - 2023-10-16
278 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
282 - Switch the worker node eventing code to `EventTarget` API.
284 ## [3.0.0] - 2023-10-08
288 - Remove Node.js 16.x.x (EOL) support.
290 ## [2.7.5] - 2023-10-03
294 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
296 ## [2.7.4] - 2023-09-25
300 - Fix source maps (bundler issue).
302 ## [2.7.3] - 2023-09-24
306 - Convert pool event emitter to event emitter async resource.
308 ## [2.7.2] - 2023-09-23
312 - Add source maps to npm package to ease debugging.
316 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
318 ## [2.7.1] - 2023-09-20
322 - Ensure worker message listener used one time are removed after usage.
324 ## [2.7.0] - 2023-09-19
328 - Fix task stealing related tasks queue options handling at runtime.
332 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
336 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
337 - Stricter worker constructor arguments validation.
339 ## [2.6.45] - 2023-09-17
343 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
347 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
348 - Add `start()` method to pool API to start the minimum number of workers.
349 - 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.
350 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
352 ## [2.6.44] - 2023-09-08
356 - Use a dedicated PAT to publish on GitHub packages registry.
360 - Publish on GitHub packages registry on release.
364 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
366 ## [2.6.43] - 2023-09-08
370 - Publish on GitHub packages registry on release.
374 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
376 ## [2.6.42] - 2023-09-06
380 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
382 ## [2.6.41] - 2023-09-03
386 - Optimize worker choice strategies implementation.
388 ## [2.6.40] - 2023-09-01
392 - Do not pre-choose in WRR worker choice strategy to avoid bias.
393 - Avoid array out of bound in worker choice strategies after worker node removal.
395 ## [2.6.39] - 2023-08-30
399 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
401 ## [2.6.38] - 2023-08-30
405 - Bundle typescript types declaration into one file.
409 - Improve interleaved weighted round robin worker choice strategy implementation.
411 ## [2.6.37] - 2023-08-28
415 - Ensure unused worker usage statistics are deleted at runtime.
419 - Rename worker choice strategy options `choiceRetries` to `retries`.
420 - Avoid unnecessary branching in worker choice strategies.
422 ## [2.6.36] - 2023-08-27
426 - Fix pool `execute()` arguments check.
430 - Make continuous tasks stealing algorithm less aggressive.
431 - Fine tune tasks stealing algorithm under back pressure.
433 ## [2.6.35] - 2023-08-25
437 - Don't account worker usage statistics for tasks that have failed.
438 - Fix pool information runtime and wait time median computation.
442 - Update simple moving average implementation to use a circular buffer.
443 - Update simple moving median implementation to use a circular buffer.
444 - Account for stolen tasks in worker usage statistics and pool information.
448 - Continuous tasks stealing algorithm.
450 ## [2.6.34] - 2023-08-24
454 - Avoid cascading tasks stealing under back pressure.
458 - Add fastpath to queued tasks rescheduling.
460 ## [2.6.33] - 2023-08-24
464 - Fix queued tasks rescheduling.
468 - Rename tasks queue options `queueMaxSize` to `size`.
472 - Task stealing scheduling algorithm if tasks queueing is enabled.
474 ## [2.6.32] - 2023-08-23
478 - Ensure no task can be executed when the pool is destroyed.
482 - Add `queueMaxSize` option to tasks queue options.
483 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
484 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
486 ## [2.6.31] - 2023-08-20
490 - Fix worker choice strategy retries mechanism in some edge cases.
494 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
495 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
497 ## [2.6.30] - 2023-08-19
501 - Ensure pool event `backPressure` is emitted.
502 - Ensure pool event `full` is emitted only once.
503 - Ensure worker node cannot be instantiated without proper arguments.
505 ## [2.6.29] - 2023-08-18
509 - Fix race condition between readiness and task functions worker message handling at startup.
510 - Fix duplicate task function worker usage statistics computation per task function.
511 - Update task function worker usage statistics if and only if there's at least two different task functions.
512 - Fix race condition at task function worker usage executing task computation leading to negative value.
516 - 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).
517 - Use back pressure detection in worker choice strategies.
518 - Add worker choice strategies retries mechanism if no worker is eligible.
520 ## [2.6.28] - 2023-08-16
524 - Ensure pool workers are properly initialized.
528 - HTTP server pool examples: express-cluster, express-hybrid.
532 - Remove now useless branching in worker hot code path.
534 ## [2.6.27] - 2023-08-15
538 - Add `KillHandler` type definition to exported types.
542 - Add `destroy` event to pool API.
544 ## [2.6.26] - 2023-08-15
548 - Add kill handler to worker options allowing to execute custom code when worker is killed.
549 - Add `listTaskFunctions()` method to pool API.
550 - SMTP client pool example: nodemailer.
552 ## [2.6.25] - 2023-08-13
556 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
557 - WebSocket server pool examples: ws-cluster, ws-hybrid.
559 ## [2.6.24] - 2023-08-12
563 - Add array of transferable objects to the `execute()` method arguments.
564 - WebSocket server pool examples: ws-worker_threads.
566 ## [2.6.23] - 2023-08-11
570 - 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.
574 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
575 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
577 ## [2.6.22] - 2023-08-10
581 - Add missing `types` field to package.json `exports`.
585 - Structure markdown documentation (PR #811).
587 ## [2.6.21] - 2023-08-03
591 - Improve code documentation.
592 - Code refactoring and cleanup for better maintainability and readability.
594 ## [2.6.20] - 2023-07-21
598 - Fix queued tasks redistribution on error task execution starvation.
599 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
603 - Drastically reduce lookups by worker in the worker nodes.
605 ## [2.6.19] - 2023-07-20
609 - Dedicated internal communication channel for worker_threads pools.
611 ## [2.6.18] - 2023-07-19
615 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
617 ## [2.6.17] - 2023-07-16
621 - Add `listTaskFunctions()` method to worker API.
623 ## [2.6.16] - 2023-07-12
627 - Fix pool startup detection.
628 - Fix worker task functions handling.
630 ## [2.6.15] - 2023-07-11
634 - Take into account worker node readiness in worker choice strategies.
636 ## [2.6.14] - 2023-07-10
640 - Fix task function statistics tracking.
642 ## [2.6.13] - 2023-07-10
646 - Add per task function statistics tracking.
647 - Add public methods to manipulate the worker task functions at runtime.
649 ## [2.6.12] - 2023-07-09
653 - Workaround import issue with `node:os` module in node 16.x.x.
655 ## [2.6.11] - 2023-07-09
659 - Fix pool readiness semantic.
661 ## [2.6.10] - 2023-07-08
665 - Ensure workers are not recreated on error at pool startup.
669 - Add `ready` and `strategy` fields to pool information.
670 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
671 - Add dynamic pool sizing checks.
673 ## [2.6.9] - 2023-07-07
677 - Recreate the right worker type on uncaught exception.
681 - Add minimum and maximum to internal measurement statistics.
682 - Add `runTime` and `waitTime` to pool information.
683 - Check worker inactive time only on dynamic worker.
685 ## [2.6.8] - 2023-07-03
689 - Brown paper bag release to fix version handling in pool information.
691 ## [2.6.7] - 2023-07-03
695 - Ensure worker queued tasks at error are reassigned to other pool workers.
699 - Add pool `utilization` ratio to pool information.
700 - Add `version` to pool information.
701 - Add worker information to worker nodes.
703 ## [2.6.6] - 2023-07-01
707 - Add safe helper `availableParallelism()` to help sizing the pool.
711 - Ensure message handler is only registered in worker.
713 ## [2.6.5] - 2023-06-27
717 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
721 - Artificial version bump to 2.6.5 to workaround publication issue.
722 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
723 - Ensure pool event is emitted before task error promise rejection.
724 - Fix queued tasks count computation.
728 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
730 ## [2.6.4] - 2023-06-27
734 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
738 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
739 - Ensure pool event is emitted before task error promise rejection.
740 - Fix queued tasks count computation.
744 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
746 ## [2.6.3] - 2023-06-19
750 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
751 - Update strategies internals after statistics computation.
755 - Optimize O(1) queue implementation.
757 ## [2.6.2] - 2023-06-12
761 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
763 ## [2.6.1] - 2023-06-10
767 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
771 - Fix average statistics computation: ensure failed tasks are not accounted.
773 ## [2.6.0] - 2023-06-09
777 - Add `LEAST_ELU` worker choice strategy (experimental).
778 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
782 - Refactor pool worker node usage internals.
783 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
784 - Breaking change: pool information `info` property object fields have been renamed.
788 - Fix wait time accounting.
789 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
790 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
792 ## [2.5.4] - 2023-06-07
796 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
800 - Compute statistics at the worker level only if needed.
801 - Add `worker_threads` options to thread pool options.
805 - Make the `LEAST_BUSY` strategy only relies on task runtime.
807 ## [2.5.3] - 2023-06-04
811 - Refine pool information content.
812 - Limit pool internals public exposure.
814 ## [2.5.2] - 2023-06-02
818 - Add `taskError` pool event for task execution error.
819 - Add pool information `info` property to pool.
820 - Emit pool information on `busy` and `full` pool events.
822 ## [2.5.1] - 2023-06-01
826 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
827 - Add `error` pool event for uncaught worker error.
829 ## [2.5.0] - 2023-05-31
833 - Switch pool event emitter to `EventEmitterAsyncResource`.
834 - Add tasks wait time accounting in per worker tasks usage.
835 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
839 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
841 ## [2.4.14] - 2023-05-09
845 - Ensure no undefined task runtime can land in the tasks history.
846 - Fix median computation implementation once again.
850 - Unit tests for median and queue implementations.
852 ## [2.4.13] - 2023-05-08
856 - Fix worker choice strategy options validation.
857 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
859 ## [2.4.12] - 2023-05-06
863 - Support multiple task functions per worker.
864 - Add custom worker weights support to worker choice strategies options.
868 - Use O(1) queue implementation for tasks queueing.
872 - Fix median computation implementation.
873 - Fix fair share worker choice strategy internals update.
875 ## [2.4.11] - 2023-04-23
879 - Optimize free worker finding in worker choice strategies.
881 ## [2.4.10] - 2023-04-15
885 - Fix typescript type definition for task function: ensure the input data is optional.
886 - Fix typescript type definition for pool execute(): ensure the input data is optional.
888 ## [2.4.9] - 2023-04-15
892 - Add tasks queue enablement runtime setter to pool.
893 - Add tasks queue options runtime setter to pool.
894 - Add worker choice strategy options runtime setter to pool.
898 - Remove the tasks queuing experimental status.
902 - Fix task function type definition and validation.
903 - Fix worker choice strategy options handling.
905 ## [2.4.8] - 2023-04-12
909 - Fix message between main worker and worker type definition for tasks.
910 - Fix code documentation.
912 ## [2.4.7] - 2023-04-11
916 - Add worker tasks queue options to pool options.
920 - Fix missing documentation.
922 ## [2.4.6] - 2023-04-10
926 - Ensure one task at a time is executed per worker with tasks queueing enabled.
927 - Properly count worker executing tasks with tasks queueing enabled.
929 ## [2.4.5] - 2023-04-09
933 - Use monotonic high resolution timer for worker tasks runtime.
934 - Add worker tasks median runtime to statistics.
935 - Add worker tasks queue (experimental).
937 ## [2.4.4] - 2023-04-07
941 - Add `PoolEvents` enumeration and `PoolEvent` type.
945 - Destroy worker only on alive check.
947 ## [2.4.3] - 2023-04-07
951 - Fix typedoc generation with inheritance.
953 ## [2.4.2] - 2023-04-06
957 - Add `full` event to dynamic pool.
958 - Keep worker choice strategy in memory for conditional reuse.
962 - Fix possible negative worker key at worker removal in worker choice strategies.
964 ## [2.4.1] - 2023-04-05
968 - Optimize worker choice strategy for dynamic pool.
972 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
974 ## [2.4.0] - 2023-04-04
978 - Add `LESS_BUSY` worker choice strategy.
982 - Optimize worker storage in pool.
983 - Optimize worker alive status check.
984 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
985 - Optimize `LESS_USED` worker choice strategy.
986 - Update benchmark versus external threads pools.
987 - Optimize tasks usage statistics requirements for worker choice strategy.
991 - Ensure trimmable characters are checked at pool initialization.
992 - Fix message id integer overflow.
993 - Fix pool worker removal in worker choice strategy internals.
994 - Fix package publication with pnpm.
996 ## [2.4.0-3] - 2023-04-04
1000 - Add `LESS_BUSY` worker choice strategy.
1004 - Optimize worker storage in pool.
1005 - Optimize worker alive status check.
1006 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1007 - Optimize `LESS_USED` worker choice strategy.
1008 - Update benchmark versus external threads pools.
1012 - Ensure trimmable characters are checked at pool initialization.
1013 - Fix message id integer overflow.
1014 - Fix pool worker removal in worker choice strategy internals.
1015 - Fix package publication with pnpm.
1017 ## [2.4.0-2] - 2023-04-03
1021 - Add `LESS_BUSY` worker choice strategy.
1025 - Optimize worker storage in pool.
1026 - Optimize worker alive status check.
1027 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1028 - Optimize `LESS_USED` worker choice strategy.
1032 - Ensure trimmable characters are checked at pool initialization.
1033 - Fix message id integer overflow.
1034 - Fix pool worker removal in worker choice strategy internals.
1035 - Fix package publication with pnpm.
1037 ## [2.4.0-1] - 2023-04-03
1041 - Add `LESS_BUSY` worker choice strategy.
1045 - Optimize worker storage in pool.
1046 - Optimize worker alive status check.
1047 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1048 - Optimize `LESS_USED` worker choice strategy.
1052 - Ensure trimmable characters are checked at pool initialization.
1053 - Fix message id integer overflow.
1054 - Fix pool worker removal in worker choice strategy internals.
1056 ## [2.4.0-0] - 2023-04-03
1060 - Add `LESS_BUSY` worker choice strategy.
1064 - Optimize worker storage in pool.
1065 - Optimize worker alive status check.
1066 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1067 - Optimize `LESS_USED` worker choice strategy.
1071 - Ensure trimmable characters are checked at pool initialization.
1072 - Fix message id integer overflow.
1073 - Fix pool worker removal in worker choice strategy internals.
1075 ## [2.3.10] - 2023-03-18
1079 - Fix package.json `exports` syntax for ESM and CommonJS.
1083 - Permit SemVer pre-release publication.
1085 ## [2.3.10-2] - 2023-03-18
1089 - Fix package.json `exports` syntax for ESM and CommonJS.
1091 ## [2.3.10-1] - 2023-03-18
1095 - Permit SemVer pre-release publication.
1097 ## [2.3.10-0] - 2023-03-18
1101 - Fix package.json `exports` syntax for ESM and CommonJS.
1103 ## [2.3.9] - 2023-03-18
1107 - Introduce ESM module support along with CommonJS one.
1111 - Fix brown paper bag bug referencing the same object literal.
1113 ## [2.3.8] - 2023-03-18
1117 - Switch internal benchmarking code to benny.
1118 - Switch to TypeScript 5.x.x.
1119 - Switch rollup bundler plugins to core ones.
1120 - Switch to TSDoc syntax.
1121 - Enforce conventional commits.
1125 - Fix random integer generator.
1126 - Fix worker choice strategy pool type identification at initialization.
1128 ## [2.3.7] - 2022-10-23
1132 - Switch to open collective FOSS project funding platform.
1133 - Switch to ts-standard linter configuration on TypeScript code.
1137 - Fixed missing async on pool execute method.
1138 - Fixed typing in TypeScript example.
1139 - Fixed types in unit tests.
1141 ## [2.3.6] - 2022-10-22
1145 - Cleanup pool attributes and methods.
1146 - Refine error types thrown.
1150 - Fix continuous integration build on windows.
1151 - Fix code coverage reporting by using c8 instead of nyc.
1153 ## [2.3.5] - 2022-10-21
1157 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
1158 - Optimize tasks usage lookup implementation.
1162 - Fix missed pool event emitter type export.
1163 - Fix typedoc documentation generation.
1165 ## [2.3.4] - 2022-10-17
1169 - Fully automate release process with release-it.
1173 - Optimize fair share task scheduling algorithm implementation.
1174 - Update benchmark versus external pools results with latest version.
1176 ## [2.3.3] - 2022-10-15
1180 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
1182 ## [2.3.2] - 2022-10-14
1186 - Optimize fair share worker selection strategy implementation.
1190 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
1192 ## [2.3.1] - 2022-10-13
1196 - Pool worker choice strategies:
1197 - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
1198 - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
1200 ## [2.2.2] - 2022-10-09
1204 - Fixed `README.md` file.
1206 ## [2.2.1] - 2022-10-08
1210 - Dynamic worker choice strategy change at runtime.
1212 ## [2.2.0] - 2022-01-05
1214 ### Breaking Changes
1216 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
1218 ## [2.1.0] - 2021-08-29
1222 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
1224 ### Breaking Changes
1226 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
1227 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
1228 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
1229 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
1231 ## [2.0.2] - 2021-05-12
1235 - Fix `busy` event emission on fixed pool type
1237 ## [2.0.1] - 2021-03-16
1241 - Check if pool options are properly set.
1242 - `busy` event is emitted on all pool types.
1244 ## [2.0.0] - 2021-03-01
1248 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1250 ### Breaking Changes
1252 - `FullPool` event is now renamed to `busy`.
1253 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1254 _Find more details on our JSDoc._
1256 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1258 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1260 ### Pool options types declaration merge
1262 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1264 #### New `export` strategy
1268 const DynamicThreadPool = require('poolifier/lib/dynamic')
1270 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1273 But you should always prefer just using
1276 const { DynamicThreadPool } = require('poolifier')
1279 #### New type definitions for input data and response
1281 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1282 _This is not a limitation by poolifier but Node.js._
1284 #### Public property replacements
1286 `numWorkers` property is now `numberOfWorkers`
1288 #### Internal (protected) properties and methods renaming
1290 These properties are not intended for end users
1292 - `id` => `nextMessageId`
1294 These methods are not intended for end users
1296 - `_chooseWorker` => `chooseWorker`
1297 - `_newWorker` => `createWorker`
1298 - `_execute` => `internalExecute`
1299 - `_chooseWorker` => `chooseWorker`
1300 - `_checkAlive` => `checkAlive`
1302 - `_runAsync` => `runAsync`
1304 ## [1.1.0] - 2020-05-21
1308 - ThreadWorker support async functions as option
1309 - Various external library patches
1311 ## [1.0.0] - 2020-01-24
1315 - FixedThreadPool implementation
1316 - DynamicThreadPool implementation
1317 - WorkerThread implementation to improve developer experience