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.
14 ## [3.1.23] - 2024-03-27
20 ## [3.1.22] - 2024-03-15
24 - Fix pool event emitter registered callbacks removal at `destroy()`.
26 ## [3.1.21] - 2024-02-22
30 - Fix null exception regression: [#1496](https://github.com/poolifier/poolifier/issues/1496).
32 ## [3.1.20] - 2024-02-11
36 - Ensure `worker_threads` workers are unreferenced at termination.
38 ## [3.1.19] - 2024-01-16
42 - Fix possible null exception at task finishing handling.
46 - Optimize Deque implementation to improve tasks queueing performance.
48 ## [3.1.18] - 2024-01-06
52 - Fix dynamic pool with minimum number of workers set to zero: [#1748](https://github.com/poolifier/poolifier/issues/1748).
54 ## [3.1.17] - 2024-01-05
58 - Improve performance by clean up unneeded condition checks on hot code paths.
60 ## [3.1.16] - 2024-01-03
64 - Add missing type to TS type definitions.
66 ## [3.1.15] - 2024-01-02
70 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
72 ## [3.1.15-0] - 2024-01-02
76 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
78 ## [3.1.14] - 2024-01-01
82 - Properly handle dynamic pool with zero minimum size.
84 ## [3.1.13] - 2023-12-30
88 - Reduce branching in several hot code paths.
89 - Use faster object cloning implementation.
91 ## [3.1.12] - 2023-12-27
95 - Fix tasks redistribution triggers at pool destroying.
99 - Switch TypeScript module resolution to Node16.
101 ## [3.1.12-0] - 2023-12-27
105 - Fix tasks redistribution triggers at pool destroying.
107 ## [3.1.11] - 2023-12-24
111 - Avoid worker node cross tasks stealing.
112 - Ensure only half the pool worker nodes can steal tasks.
114 ## [3.1.10] - 2023-12-23
118 - Avoid useless branching on pool type.
120 ## [3.1.9] - 2023-12-22
124 - Readd ThreadPoolOptions and ClusterPoolOptions TS type aliases to PoolOptions.
126 ## [3.1.8] - 2023-12-21
130 - Fix default worker weight computation.
131 - Fix possible null exception at pool destroying.
133 ## [3.1.7] - 2023-12-20
137 - Ensure worker choice strategies implementation wait for worker node readiness: [#1748](https://github.com/poolifier/poolifier/issues/1748).
139 ## [3.1.6] - 2023-12-18
143 - Fix pool destroying with tasks queuing enabled.
145 ## [3.1.5] - 2023-12-18
149 - Add queued tasks end timeout support to worker node termination.
151 ## [3.1.4] - 2023-12-18
155 - Make more robust the fix for possible null exception at handling task execution response.
157 ## [3.1.3] - 2023-12-17
161 - Fix possible null exception at handling task execution response.
163 ## [3.1.2] - 2023-12-17
167 - Wait for queued tasks to end at worker node termination.
169 ## [3.1.1] - 2023-12-16
173 - Fix pool options TS type definition.
175 ## [3.1.0] - 2023-12-16
179 - TypeScript breaking change: merge ThreadPoolOptions and ClusterPoolOptions types into PoolOptions type.
181 ## [3.0.14] - 2023-12-13
185 - Fix possible null exception with worker_threads pools.
187 ## [3.0.13] - 2023-12-12
191 - Ensure worker choice strategy wait for worker nodes readiness.
195 - Remove infinite retries support in worker choice strategy to avoid configuration leading to possible infinite recursion or loop.
197 ## [3.0.12] - 2023-12-12
201 - Add infinite retries support in worker choice strategy.
203 ## [3.0.11] - 2023-12-11
207 - Ensure pool asynchronous resource properly track tasks execution.
209 ## [3.0.10] - 2023-12-08
213 - Add a fastpath when tasks stealing or redistribution is impossible.
215 ## [3.0.9] - 2023-11-26
219 - Remove all pool events listener at pool destroying.
220 - Remove all worker node events listener at worker node destroying.
221 - Fix worker node event emitter listeners handling memory leak at pool options runtime change.
223 ## [3.0.8] - 2023-11-25
227 - Ensure continuous tasks stealing on idle start at worker node idling.
229 ## [3.0.7] - 2023-11-24
233 - Make continuous tasks stealing start at worker node idling.
235 ## [3.0.6] - 2023-11-24
239 - Ensure pool statuses are checked at initialization, `start()` or `destroy()`.
240 - Ensure pool `ready` event can be emitted after several `start()/destroy()` cycles.
242 ## [3.0.5] - 2023-10-27
246 - Ensure pool `ready` event can be emitted only once.
248 ## [3.0.4] - 2023-10-20
252 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
253 - Use builtin retry mechanism in worker choice strategies instead of custom one.
255 ## [3.0.3] - 2023-10-19
259 - Avoid null exception at sending message to worker.
260 - Avoid null exception at checking worker node readiness.
262 ## [3.0.2] - 2023-10-17
266 - 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).
268 ## [3.0.1] - 2023-10-16
272 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
276 - Switch the worker node eventing code to `EventTarget` API.
278 ## [3.0.0] - 2023-10-08
282 - Remove Node.js 16.x.x (EOL) support.
284 ## [2.7.5] - 2023-10-03
288 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
290 ## [2.7.4] - 2023-09-25
294 - Fix source maps (bundler issue).
296 ## [2.7.3] - 2023-09-24
300 - Convert pool event emitter to event emitter async resource.
302 ## [2.7.2] - 2023-09-23
306 - Add source maps to npm package to ease debugging.
310 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
312 ## [2.7.1] - 2023-09-20
316 - Ensure worker message listener used one time are removed after usage.
318 ## [2.7.0] - 2023-09-19
322 - Fix task stealing related tasks queue options handling at runtime.
326 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
330 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
331 - Stricter worker constructor arguments validation.
333 ## [2.6.45] - 2023-09-17
337 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
341 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
342 - Add `start()` method to pool API to start the minimum number of workers.
343 - 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.
344 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
346 ## [2.6.44] - 2023-09-08
350 - Use a dedicated PAT to publish on GitHub packages registry.
354 - Publish on GitHub packages registry on release.
358 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
360 ## [2.6.43] - 2023-09-08
364 - Publish on GitHub packages registry on release.
368 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
370 ## [2.6.42] - 2023-09-06
374 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
376 ## [2.6.41] - 2023-09-03
380 - Optimize worker choice strategies implementation.
382 ## [2.6.40] - 2023-09-01
386 - Do not pre-choose in WRR worker choice strategy to avoid bias.
387 - Avoid array out of bound in worker choice strategies after worker node removal.
389 ## [2.6.39] - 2023-08-30
393 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
395 ## [2.6.38] - 2023-08-30
399 - Bundle typescript types declaration into one file.
403 - Improve interleaved weighted round robin worker choice strategy implementation.
405 ## [2.6.37] - 2023-08-28
409 - Ensure unused worker usage statistics are deleted at runtime.
413 - Rename worker choice strategy options `choiceRetries` to `retries`.
414 - Avoid unnecessary branching in worker choice strategies.
416 ## [2.6.36] - 2023-08-27
420 - Fix pool `execute()` arguments check.
424 - Make continuous tasks stealing algorithm less aggressive.
425 - Fine tune tasks stealing algorithm under back pressure.
427 ## [2.6.35] - 2023-08-25
431 - Don't account worker usage statistics for tasks that have failed.
432 - Fix pool information runtime and wait time median computation.
436 - Update simple moving average implementation to use a circular buffer.
437 - Update simple moving median implementation to use a circular buffer.
438 - Account for stolen tasks in worker usage statistics and pool information.
442 - Continuous tasks stealing algorithm.
444 ## [2.6.34] - 2023-08-24
448 - Avoid cascading tasks stealing under back pressure.
452 - Add fastpath to queued tasks rescheduling.
454 ## [2.6.33] - 2023-08-24
458 - Fix queued tasks rescheduling.
462 - Rename tasks queue options `queueMaxSize` to `size`.
466 - Task stealing scheduling algorithm if tasks queueing is enabled.
468 ## [2.6.32] - 2023-08-23
472 - Ensure no task can be executed when the pool is destroyed.
476 - Add `queueMaxSize` option to tasks queue options.
477 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
478 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
480 ## [2.6.31] - 2023-08-20
484 - Fix worker choice strategy retries mechanism in some edge cases.
488 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
489 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
491 ## [2.6.30] - 2023-08-19
495 - Ensure pool event `backPressure` is emitted.
496 - Ensure pool event `full` is emitted only once.
497 - Ensure worker node cannot be instantiated without proper arguments.
499 ## [2.6.29] - 2023-08-18
503 - Fix race condition between readiness and task functions worker message handling at startup.
504 - Fix duplicate task function worker usage statistics computation per task function.
505 - Update task function worker usage statistics if and only if there's at least two different task functions.
506 - Fix race condition at task function worker usage executing task computation leading to negative value.
510 - 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).
511 - Use back pressure detection in worker choice strategies.
512 - Add worker choice strategies retries mechanism if no worker is eligible.
514 ## [2.6.28] - 2023-08-16
518 - Ensure pool workers are properly initialized.
522 - HTTP server pool examples: express-cluster, express-hybrid.
526 - Remove now useless branching in worker hot code path.
528 ## [2.6.27] - 2023-08-15
532 - Add `KillHandler` type definition to exported types.
536 - Add `destroy` event to pool API.
538 ## [2.6.26] - 2023-08-15
542 - Add kill handler to worker options allowing to execute custom code when worker is killed.
543 - Add `listTaskFunctions()` method to pool API.
544 - SMTP client pool example: nodemailer.
546 ## [2.6.25] - 2023-08-13
550 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
551 - WebSocket server pool examples: ws-cluster, ws-hybrid.
553 ## [2.6.24] - 2023-08-12
557 - Add array of transferable objects to the `execute()` method arguments.
558 - WebSocket server pool examples: ws-worker_threads.
560 ## [2.6.23] - 2023-08-11
564 - 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.
568 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
569 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
571 ## [2.6.22] - 2023-08-10
575 - Add missing `types` field to package.json `exports`.
579 - Structure markdown documentation (PR #811).
581 ## [2.6.21] - 2023-08-03
585 - Improve code documentation.
586 - Code refactoring and cleanup for better maintainability and readability.
588 ## [2.6.20] - 2023-07-21
592 - Fix queued tasks redistribution on error task execution starvation.
593 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
597 - Drastically reduce lookups by worker in the worker nodes.
599 ## [2.6.19] - 2023-07-20
603 - Dedicated internal communication channel for worker_threads pools.
605 ## [2.6.18] - 2023-07-19
609 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
611 ## [2.6.17] - 2023-07-16
615 - Add `listTaskFunctions()` method to worker API.
617 ## [2.6.16] - 2023-07-12
621 - Fix pool startup detection.
622 - Fix worker task functions handling.
624 ## [2.6.15] - 2023-07-11
628 - Take into account worker node readiness in worker choice strategies.
630 ## [2.6.14] - 2023-07-10
634 - Fix task function statistics tracking.
636 ## [2.6.13] - 2023-07-10
640 - Add per task function statistics tracking.
641 - Add public methods to manipulate the worker task functions at runtime.
643 ## [2.6.12] - 2023-07-09
647 - Workaround import issue with `node:os` module in node 16.x.x.
649 ## [2.6.11] - 2023-07-09
653 - Fix pool readiness semantic.
655 ## [2.6.10] - 2023-07-08
659 - Ensure workers are not recreated on error at pool startup.
663 - Add `ready` and `strategy` fields to pool information.
664 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
665 - Add dynamic pool sizing checks.
667 ## [2.6.9] - 2023-07-07
671 - Recreate the right worker type on uncaught exception.
675 - Add minimum and maximum to internal measurement statistics.
676 - Add `runTime` and `waitTime` to pool information.
677 - Check worker inactive time only on dynamic worker.
679 ## [2.6.8] - 2023-07-03
683 - Brown paper bag release to fix version handling in pool information.
685 ## [2.6.7] - 2023-07-03
689 - Ensure worker queued tasks at error are reassigned to other pool workers.
693 - Add pool `utilization` ratio to pool information.
694 - Add `version` to pool information.
695 - Add worker information to worker nodes.
697 ## [2.6.6] - 2023-07-01
701 - Add safe helper `availableParallelism()` to help sizing the pool.
705 - Ensure message handler is only registered in worker.
707 ## [2.6.5] - 2023-06-27
711 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
715 - Artificial version bump to 2.6.5 to workaround publication issue.
716 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
717 - Ensure pool event is emitted before task error promise rejection.
718 - Fix queued tasks count computation.
722 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
724 ## [2.6.4] - 2023-06-27
728 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
732 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
733 - Ensure pool event is emitted before task error promise rejection.
734 - Fix queued tasks count computation.
738 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
740 ## [2.6.3] - 2023-06-19
744 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
745 - Update strategies internals after statistics computation.
749 - Optimize O(1) queue implementation.
751 ## [2.6.2] - 2023-06-12
755 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
757 ## [2.6.1] - 2023-06-10
761 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
765 - Fix average statistics computation: ensure failed tasks are not accounted.
767 ## [2.6.0] - 2023-06-09
771 - Add `LEAST_ELU` worker choice strategy (experimental).
772 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
776 - Refactor pool worker node usage internals.
777 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
778 - Breaking change: pool information `info` property object fields have been renamed.
782 - Fix wait time accounting.
783 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
784 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
786 ## [2.5.4] - 2023-06-07
790 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
794 - Compute statistics at the worker level only if needed.
795 - Add `worker_threads` options to thread pool options.
799 - Make the `LEAST_BUSY` strategy only relies on task runtime.
801 ## [2.5.3] - 2023-06-04
805 - Refine pool information content.
806 - Limit pool internals public exposure.
808 ## [2.5.2] - 2023-06-02
812 - Add `taskError` pool event for task execution error.
813 - Add pool information `info` property to pool.
814 - Emit pool information on `busy` and `full` pool events.
816 ## [2.5.1] - 2023-06-01
820 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
821 - Add `error` pool event for uncaught worker error.
823 ## [2.5.0] - 2023-05-31
827 - Switch pool event emitter to `EventEmitterAsyncResource`.
828 - Add tasks wait time accounting in per worker tasks usage.
829 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
833 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
835 ## [2.4.14] - 2023-05-09
839 - Ensure no undefined task runtime can land in the tasks history.
840 - Fix median computation implementation once again.
844 - Unit tests for median and queue implementations.
846 ## [2.4.13] - 2023-05-08
850 - Fix worker choice strategy options validation.
851 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
853 ## [2.4.12] - 2023-05-06
857 - Support multiple task functions per worker.
858 - Add custom worker weights support to worker choice strategies options.
862 - Use O(1) queue implementation for tasks queueing.
866 - Fix median computation implementation.
867 - Fix fair share worker choice strategy internals update.
869 ## [2.4.11] - 2023-04-23
873 - Optimize free worker finding in worker choice strategies.
875 ## [2.4.10] - 2023-04-15
879 - Fix typescript type definition for task function: ensure the input data is optional.
880 - Fix typescript type definition for pool execute(): ensure the input data is optional.
882 ## [2.4.9] - 2023-04-15
886 - Add tasks queue enablement runtime setter to pool.
887 - Add tasks queue options runtime setter to pool.
888 - Add worker choice strategy options runtime setter to pool.
892 - Remove the tasks queuing experimental status.
896 - Fix task function type definition and validation.
897 - Fix worker choice strategy options handling.
899 ## [2.4.8] - 2023-04-12
903 - Fix message between main worker and worker type definition for tasks.
904 - Fix code documentation.
906 ## [2.4.7] - 2023-04-11
910 - Add worker tasks queue options to pool options.
914 - Fix missing documentation.
916 ## [2.4.6] - 2023-04-10
920 - Ensure one task at a time is executed per worker with tasks queueing enabled.
921 - Properly count worker executing tasks with tasks queueing enabled.
923 ## [2.4.5] - 2023-04-09
927 - Use monotonic high resolution timer for worker tasks runtime.
928 - Add worker tasks median runtime to statistics.
929 - Add worker tasks queue (experimental).
931 ## [2.4.4] - 2023-04-07
935 - Add `PoolEvents` enumeration and `PoolEvent` type.
939 - Destroy worker only on alive check.
941 ## [2.4.3] - 2023-04-07
945 - Fix typedoc generation with inheritance.
947 ## [2.4.2] - 2023-04-06
951 - Add `full` event to dynamic pool.
952 - Keep worker choice strategy in memory for conditional reuse.
956 - Fix possible negative worker key at worker removal in worker choice strategies.
958 ## [2.4.1] - 2023-04-05
962 - Optimize worker choice strategy for dynamic pool.
966 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
968 ## [2.4.0] - 2023-04-04
972 - Add `LESS_BUSY` worker choice strategy.
976 - Optimize worker storage in pool.
977 - Optimize worker alive status check.
978 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
979 - Optimize `LESS_USED` worker choice strategy.
980 - Update benchmark versus external threads pools.
981 - Optimize tasks usage statistics requirements for worker choice strategy.
985 - Ensure trimmable characters are checked at pool initialization.
986 - Fix message id integer overflow.
987 - Fix pool worker removal in worker choice strategy internals.
988 - Fix package publication with pnpm.
990 ## [2.4.0-3] - 2023-04-04
994 - Add `LESS_BUSY` worker choice strategy.
998 - Optimize worker storage in pool.
999 - Optimize worker alive status check.
1000 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1001 - Optimize `LESS_USED` worker choice strategy.
1002 - Update benchmark versus external threads pools.
1006 - Ensure trimmable characters are checked at pool initialization.
1007 - Fix message id integer overflow.
1008 - Fix pool worker removal in worker choice strategy internals.
1009 - Fix package publication with pnpm.
1011 ## [2.4.0-2] - 2023-04-03
1015 - Add `LESS_BUSY` worker choice strategy.
1019 - Optimize worker storage in pool.
1020 - Optimize worker alive status check.
1021 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1022 - Optimize `LESS_USED` worker choice strategy.
1026 - Ensure trimmable characters are checked at pool initialization.
1027 - Fix message id integer overflow.
1028 - Fix pool worker removal in worker choice strategy internals.
1029 - Fix package publication with pnpm.
1031 ## [2.4.0-1] - 2023-04-03
1035 - Add `LESS_BUSY` worker choice strategy.
1039 - Optimize worker storage in pool.
1040 - Optimize worker alive status check.
1041 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1042 - Optimize `LESS_USED` worker choice strategy.
1046 - Ensure trimmable characters are checked at pool initialization.
1047 - Fix message id integer overflow.
1048 - Fix pool worker removal in worker choice strategy internals.
1050 ## [2.4.0-0] - 2023-04-03
1054 - Add `LESS_BUSY` worker choice strategy.
1058 - Optimize worker storage in pool.
1059 - Optimize worker alive status check.
1060 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1061 - Optimize `LESS_USED` worker choice strategy.
1065 - Ensure trimmable characters are checked at pool initialization.
1066 - Fix message id integer overflow.
1067 - Fix pool worker removal in worker choice strategy internals.
1069 ## [2.3.10] - 2023-03-18
1073 - Fix package.json `exports` syntax for ESM and CommonJS.
1077 - Permit SemVer pre-release publication.
1079 ## [2.3.10-2] - 2023-03-18
1083 - Fix package.json `exports` syntax for ESM and CommonJS.
1085 ## [2.3.10-1] - 2023-03-18
1089 - Permit SemVer pre-release publication.
1091 ## [2.3.10-0] - 2023-03-18
1095 - Fix package.json `exports` syntax for ESM and CommonJS.
1097 ## [2.3.9] - 2023-03-18
1101 - Introduce ESM module support along with CommonJS one.
1105 - Fix brown paper bag bug referencing the same object literal.
1107 ## [2.3.8] - 2023-03-18
1111 - Switch internal benchmarking code to benny.
1112 - Switch to TypeScript 5.x.x.
1113 - Switch rollup bundler plugins to core ones.
1114 - Switch to TSDoc syntax.
1115 - Enforce conventional commits.
1119 - Fix random integer generator.
1120 - Fix worker choice strategy pool type identification at initialization.
1122 ## [2.3.7] - 2022-10-23
1126 - Switch to open collective FOSS project funding platform.
1127 - Switch to ts-standard linter configuration on TypeScript code.
1131 - Fixed missing async on pool execute method.
1132 - Fixed typing in TypeScript example.
1133 - Fixed types in unit tests.
1135 ## [2.3.6] - 2022-10-22
1139 - Cleanup pool attributes and methods.
1140 - Refine error types thrown.
1144 - Fix continuous integration build on windows.
1145 - Fix code coverage reporting by using c8 instead of nyc.
1147 ## [2.3.5] - 2022-10-21
1151 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
1152 - Optimize tasks usage lookup implementation.
1156 - Fix missed pool event emitter type export.
1157 - Fix typedoc documentation generation.
1159 ## [2.3.4] - 2022-10-17
1163 - Fully automate release process with release-it.
1167 - Optimize fair share task scheduling algorithm implementation.
1168 - Update benchmark versus external pools results with latest version.
1170 ## [2.3.3] - 2022-10-15
1174 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
1176 ## [2.3.2] - 2022-10-14
1180 - Optimize fair share worker selection strategy implementation.
1184 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
1186 ## [2.3.1] - 2022-10-13
1190 - Pool worker choice strategies:
1191 - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
1192 - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
1194 ## [2.2.2] - 2022-10-09
1198 - Fixed `README.md` file.
1200 ## [2.2.1] - 2022-10-08
1204 - Dynamic worker choice strategy change at runtime.
1206 ## [2.2.0] - 2022-01-05
1208 ### Breaking Changes
1210 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
1212 ## [2.1.0] - 2021-08-29
1216 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
1218 ### Breaking Changes
1220 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
1221 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
1222 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
1223 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
1225 ## [2.0.2] - 2021-05-12
1229 - Fix `busy` event emission on fixed pool type
1231 ## [2.0.1] - 2021-03-16
1235 - Check if pool options are properly set.
1236 - `busy` event is emitted on all pool types.
1238 ## [2.0.0] - 2021-03-01
1242 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1244 ### Breaking Changes
1246 - `FullPool` event is now renamed to `busy`.
1247 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1248 _Find more details on our JSDoc._
1250 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1252 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1254 ### Pool options types declaration merge
1256 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1258 #### New `export` strategy
1262 const DynamicThreadPool = require('poolifier/lib/dynamic')
1264 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1267 But you should always prefer just using
1270 const { DynamicThreadPool } = require('poolifier')
1273 #### New type definitions for input data and response
1275 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1276 _This is not a limitation by poolifier but Node.js._
1278 #### Public property replacements
1280 `numWorkers` property is now `numberOfWorkers`
1282 #### Internal (protected) properties and methods renaming
1284 These properties are not intended for end users
1286 - `id` => `nextMessageId`
1288 These methods are not intended for end users
1290 - `_chooseWorker` => `chooseWorker`
1291 - `_newWorker` => `createWorker`
1292 - `_execute` => `internalExecute`
1293 - `_chooseWorker` => `chooseWorker`
1294 - `_checkAlive` => `checkAlive`
1296 - `_runAsync` => `runAsync`
1298 ## [1.1.0] - 2020-05-21
1302 - ThreadWorker support async functions as option
1303 - Various external library patches
1305 ## [1.0.0] - 2020-01-24
1309 - FixedThreadPool implementation
1310 - DynamicThreadPool implementation
1311 - WorkerThread implementation to improve developer experience