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 ## [3.1.22] - 2024-03-15
14 - Fix pool event emitter registered callbacks removal at `destroy()`.
16 ## [3.1.21] - 2024-02-22
20 - Fix null exception regression: [#1496](https://github.com/poolifier/poolifier/issues/1496).
22 ## [3.1.20] - 2024-02-11
26 - Ensure `worker_threads` workers are unreferenced at termination.
28 ## [3.1.19] - 2024-01-16
32 - Fix possible null exception at task finishing handling.
36 - Optimize Deque implementation to improve tasks queueing performance.
38 ## [3.1.18] - 2024-01-06
42 - Fix dynamic pool with minimum number of workers set to zero: [#1748](https://github.com/poolifier/poolifier/issues/1748).
44 ## [3.1.17] - 2024-01-05
48 - Improve performance by clean up unneeded condition checks on hot code paths.
50 ## [3.1.16] - 2024-01-03
54 - Add missing type to TS type definitions.
56 ## [3.1.15] - 2024-01-02
60 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
62 ## [3.1.15-0] - 2024-01-02
66 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
68 ## [3.1.14] - 2024-01-01
72 - Properly handle dynamic pool with zero minimum size.
74 ## [3.1.13] - 2023-12-30
78 - Reduce branching in several hot code paths.
79 - Use faster object cloning implementation.
81 ## [3.1.12] - 2023-12-27
85 - Fix tasks redistribution triggers at pool destroying.
89 - Switch TypeScript module resolution to Node16.
91 ## [3.1.12-0] - 2023-12-27
95 - Fix tasks redistribution triggers at pool destroying.
97 ## [3.1.11] - 2023-12-24
101 - Avoid worker node cross tasks stealing.
102 - Ensure only half the pool worker nodes can steal tasks.
104 ## [3.1.10] - 2023-12-23
108 - Avoid useless branching on pool type.
110 ## [3.1.9] - 2023-12-22
114 - Readd ThreadPoolOptions and ClusterPoolOptions TS type aliases to PoolOptions.
116 ## [3.1.8] - 2023-12-21
120 - Fix default worker weight computation.
121 - Fix possible null exception at pool destroying.
123 ## [3.1.7] - 2023-12-20
127 - Ensure worker choice strategies implementation wait for worker node readiness: [#1748](https://github.com/poolifier/poolifier/issues/1748).
129 ## [3.1.6] - 2023-12-18
133 - Fix pool destroying with tasks queuing enabled.
135 ## [3.1.5] - 2023-12-18
139 - Add queued tasks end timeout support to worker node termination.
141 ## [3.1.4] - 2023-12-18
145 - Make more robust the fix for possible null exception at handling task execution response.
147 ## [3.1.3] - 2023-12-17
151 - Fix possible null exception at handling task execution response.
153 ## [3.1.2] - 2023-12-17
157 - Wait for queued tasks to end at worker node termination.
159 ## [3.1.1] - 2023-12-16
163 - Fix pool options TS type definition.
165 ## [3.1.0] - 2023-12-16
169 - TypeScript breaking change: merge ThreadPoolOptions and ClusterPoolOptions types into PoolOptions type.
171 ## [3.0.14] - 2023-12-13
175 - Fix possible null exception with worker_threads pools.
177 ## [3.0.13] - 2023-12-12
181 - Ensure worker choice strategy wait for worker nodes readiness.
185 - Remove infinite retries support in worker choice strategy to avoid configuration leading to possible infinite recursion or loop.
187 ## [3.0.12] - 2023-12-12
191 - Add infinite retries support in worker choice strategy.
193 ## [3.0.11] - 2023-12-11
197 - Ensure pool asynchronous resource properly track tasks execution.
199 ## [3.0.10] - 2023-12-08
203 - Add a fastpath when tasks stealing or redistribution is impossible.
205 ## [3.0.9] - 2023-11-26
209 - Remove all pool events listener at pool destroying.
210 - Remove all worker node events listener at worker node destroying.
211 - Fix worker node event emitter listeners handling memory leak at pool options runtime change.
213 ## [3.0.8] - 2023-11-25
217 - Ensure continuous tasks stealing on idle start at worker node idling.
219 ## [3.0.7] - 2023-11-24
223 - Make continuous tasks stealing start at worker node idling.
225 ## [3.0.6] - 2023-11-24
229 - Ensure pool statuses are checked at initialization, `start()` or `destroy()`.
230 - Ensure pool `ready` event can be emitted after several `start()/destroy()` cycles.
232 ## [3.0.5] - 2023-10-27
236 - Ensure pool `ready` event can be emitted only once.
238 ## [3.0.4] - 2023-10-20
242 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
243 - Use builtin retry mechanism in worker choice strategies instead of custom one.
245 ## [3.0.3] - 2023-10-19
249 - Avoid null exception at sending message to worker.
250 - Avoid null exception at checking worker node readiness.
252 ## [3.0.2] - 2023-10-17
256 - 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).
258 ## [3.0.1] - 2023-10-16
262 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
266 - Switch the worker node eventing code to `EventTarget` API.
268 ## [3.0.0] - 2023-10-08
272 - Remove Node.js 16.x.x (EOL) support.
274 ## [2.7.5] - 2023-10-03
278 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
280 ## [2.7.4] - 2023-09-25
284 - Fix source maps (bundler issue).
286 ## [2.7.3] - 2023-09-24
290 - Convert pool event emitter to event emitter async resource.
292 ## [2.7.2] - 2023-09-23
296 - Add source maps to npm package to ease debugging.
300 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
302 ## [2.7.1] - 2023-09-20
306 - Ensure worker message listener used one time are removed after usage.
308 ## [2.7.0] - 2023-09-19
312 - Fix task stealing related tasks queue options handling at runtime.
316 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
320 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
321 - Stricter worker constructor arguments validation.
323 ## [2.6.45] - 2023-09-17
327 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
331 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
332 - Add `start()` method to pool API to start the minimum number of workers.
333 - 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.
334 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
336 ## [2.6.44] - 2023-09-08
340 - Use a dedicated PAT to publish on GitHub packages registry.
344 - Publish on GitHub packages registry on release.
348 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
350 ## [2.6.43] - 2023-09-08
354 - Publish on GitHub packages registry on release.
358 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
360 ## [2.6.42] - 2023-09-06
364 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
366 ## [2.6.41] - 2023-09-03
370 - Optimize worker choice strategies implementation.
372 ## [2.6.40] - 2023-09-01
376 - Do not pre-choose in WRR worker choice strategy to avoid bias.
377 - Avoid array out of bound in worker choice strategies after worker node removal.
379 ## [2.6.39] - 2023-08-30
383 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
385 ## [2.6.38] - 2023-08-30
389 - Bundle typescript types declaration into one file.
393 - Improve interleaved weighted round robin worker choice strategy implementation.
395 ## [2.6.37] - 2023-08-28
399 - Ensure unused worker usage statistics are deleted at runtime.
403 - Rename worker choice strategy options `choiceRetries` to `retries`.
404 - Avoid unnecessary branching in worker choice strategies.
406 ## [2.6.36] - 2023-08-27
410 - Fix pool `execute()` arguments check.
414 - Make continuous tasks stealing algorithm less aggressive.
415 - Fine tune tasks stealing algorithm under back pressure.
417 ## [2.6.35] - 2023-08-25
421 - Don't account worker usage statistics for tasks that have failed.
422 - Fix pool information runtime and wait time median computation.
426 - Update simple moving average implementation to use a circular buffer.
427 - Update simple moving median implementation to use a circular buffer.
428 - Account for stolen tasks in worker usage statistics and pool information.
432 - Continuous tasks stealing algorithm.
434 ## [2.6.34] - 2023-08-24
438 - Avoid cascading tasks stealing under back pressure.
442 - Add fastpath to queued tasks rescheduling.
444 ## [2.6.33] - 2023-08-24
448 - Fix queued tasks rescheduling.
452 - Rename tasks queue options `queueMaxSize` to `size`.
456 - Task stealing scheduling algorithm if tasks queueing is enabled.
458 ## [2.6.32] - 2023-08-23
462 - Ensure no task can be executed when the pool is destroyed.
466 - Add `queueMaxSize` option to tasks queue options.
467 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
468 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
470 ## [2.6.31] - 2023-08-20
474 - Fix worker choice strategy retries mechanism in some edge cases.
478 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
479 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
481 ## [2.6.30] - 2023-08-19
485 - Ensure pool event `backPressure` is emitted.
486 - Ensure pool event `full` is emitted only once.
487 - Ensure worker node cannot be instantiated without proper arguments.
489 ## [2.6.29] - 2023-08-18
493 - Fix race condition between readiness and task functions worker message handling at startup.
494 - Fix duplicate task function worker usage statistics computation per task function.
495 - Update task function worker usage statistics if and only if there's at least two different task functions.
496 - Fix race condition at task function worker usage executing task computation leading to negative value.
500 - 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).
501 - Use back pressure detection in worker choice strategies.
502 - Add worker choice strategies retries mechanism if no worker is eligible.
504 ## [2.6.28] - 2023-08-16
508 - Ensure pool workers are properly initialized.
512 - HTTP server pool examples: express-cluster, express-hybrid.
516 - Remove now useless branching in worker hot code path.
518 ## [2.6.27] - 2023-08-15
522 - Add `KillHandler` type definition to exported types.
526 - Add `destroy` event to pool API.
528 ## [2.6.26] - 2023-08-15
532 - Add kill handler to worker options allowing to execute custom code when worker is killed.
533 - Add `listTaskFunctions()` method to pool API.
534 - SMTP client pool example: nodemailer.
536 ## [2.6.25] - 2023-08-13
540 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
541 - WebSocket server pool examples: ws-cluster, ws-hybrid.
543 ## [2.6.24] - 2023-08-12
547 - Add array of transferable objects to the `execute()` method arguments.
548 - WebSocket server pool examples: ws-worker_threads.
550 ## [2.6.23] - 2023-08-11
554 - 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.
558 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
559 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
561 ## [2.6.22] - 2023-08-10
565 - Add missing `types` field to package.json `exports`.
569 - Structure markdown documentation (PR #811).
571 ## [2.6.21] - 2023-08-03
575 - Improve code documentation.
576 - Code refactoring and cleanup for better maintainability and readability.
578 ## [2.6.20] - 2023-07-21
582 - Fix queued tasks redistribution on error task execution starvation.
583 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
587 - Drastically reduce lookups by worker in the worker nodes.
589 ## [2.6.19] - 2023-07-20
593 - Dedicated internal communication channel for worker_threads pools.
595 ## [2.6.18] - 2023-07-19
599 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
601 ## [2.6.17] - 2023-07-16
605 - Add `listTaskFunctions()` method to worker API.
607 ## [2.6.16] - 2023-07-12
611 - Fix pool startup detection.
612 - Fix worker task functions handling.
614 ## [2.6.15] - 2023-07-11
618 - Take into account worker node readiness in worker choice strategies.
620 ## [2.6.14] - 2023-07-10
624 - Fix task function statistics tracking.
626 ## [2.6.13] - 2023-07-10
630 - Add per task function statistics tracking.
631 - Add public methods to manipulate the worker task functions at runtime.
633 ## [2.6.12] - 2023-07-09
637 - Workaround import issue with `node:os` module in node 16.x.x.
639 ## [2.6.11] - 2023-07-09
643 - Fix pool readiness semantic.
645 ## [2.6.10] - 2023-07-08
649 - Ensure workers are not recreated on error at pool startup.
653 - Add `ready` and `strategy` fields to pool information.
654 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
655 - Add dynamic pool sizing checks.
657 ## [2.6.9] - 2023-07-07
661 - Recreate the right worker type on uncaught exception.
665 - Add minimum and maximum to internal measurement statistics.
666 - Add `runTime` and `waitTime` to pool information.
667 - Check worker inactive time only on dynamic worker.
669 ## [2.6.8] - 2023-07-03
673 - Brown paper bag release to fix version handling in pool information.
675 ## [2.6.7] - 2023-07-03
679 - Ensure worker queued tasks at error are reassigned to other pool workers.
683 - Add pool `utilization` ratio to pool information.
684 - Add `version` to pool information.
685 - Add worker information to worker nodes.
687 ## [2.6.6] - 2023-07-01
691 - Add safe helper `availableParallelism()` to help sizing the pool.
695 - Ensure message handler is only registered in worker.
697 ## [2.6.5] - 2023-06-27
701 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
705 - Artificial version bump to 2.6.5 to workaround publication issue.
706 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
707 - Ensure pool event is emitted before task error promise rejection.
708 - Fix queued tasks count computation.
712 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
714 ## [2.6.4] - 2023-06-27
718 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
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 ## [2.6.3] - 2023-06-19
734 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
735 - Update strategies internals after statistics computation.
739 - Optimize O(1) queue implementation.
741 ## [2.6.2] - 2023-06-12
745 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
747 ## [2.6.1] - 2023-06-10
751 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
755 - Fix average statistics computation: ensure failed tasks are not accounted.
757 ## [2.6.0] - 2023-06-09
761 - Add `LEAST_ELU` worker choice strategy (experimental).
762 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
766 - Refactor pool worker node usage internals.
767 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
768 - Breaking change: pool information `info` property object fields have been renamed.
772 - Fix wait time accounting.
773 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
774 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
776 ## [2.5.4] - 2023-06-07
780 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
784 - Compute statistics at the worker level only if needed.
785 - Add `worker_threads` options to thread pool options.
789 - Make the `LEAST_BUSY` strategy only relies on task runtime.
791 ## [2.5.3] - 2023-06-04
795 - Refine pool information content.
796 - Limit pool internals public exposure.
798 ## [2.5.2] - 2023-06-02
802 - Add `taskError` pool event for task execution error.
803 - Add pool information `info` property to pool.
804 - Emit pool information on `busy` and `full` pool events.
806 ## [2.5.1] - 2023-06-01
810 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
811 - Add `error` pool event for uncaught worker error.
813 ## [2.5.0] - 2023-05-31
817 - Switch pool event emitter to `EventEmitterAsyncResource`.
818 - Add tasks wait time accounting in per worker tasks usage.
819 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
823 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
825 ## [2.4.14] - 2023-05-09
829 - Ensure no undefined task runtime can land in the tasks history.
830 - Fix median computation implementation once again.
834 - Unit tests for median and queue implementations.
836 ## [2.4.13] - 2023-05-08
840 - Fix worker choice strategy options validation.
841 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
843 ## [2.4.12] - 2023-05-06
847 - Support multiple task functions per worker.
848 - Add custom worker weights support to worker choice strategies options.
852 - Use O(1) queue implementation for tasks queueing.
856 - Fix median computation implementation.
857 - Fix fair share worker choice strategy internals update.
859 ## [2.4.11] - 2023-04-23
863 - Optimize free worker finding in worker choice strategies.
865 ## [2.4.10] - 2023-04-15
869 - Fix typescript type definition for task function: ensure the input data is optional.
870 - Fix typescript type definition for pool execute(): ensure the input data is optional.
872 ## [2.4.9] - 2023-04-15
876 - Add tasks queue enablement runtime setter to pool.
877 - Add tasks queue options runtime setter to pool.
878 - Add worker choice strategy options runtime setter to pool.
882 - Remove the tasks queuing experimental status.
886 - Fix task function type definition and validation.
887 - Fix worker choice strategy options handling.
889 ## [2.4.8] - 2023-04-12
893 - Fix message between main worker and worker type definition for tasks.
894 - Fix code documentation.
896 ## [2.4.7] - 2023-04-11
900 - Add worker tasks queue options to pool options.
904 - Fix missing documentation.
906 ## [2.4.6] - 2023-04-10
910 - Ensure one task at a time is executed per worker with tasks queueing enabled.
911 - Properly count worker executing tasks with tasks queueing enabled.
913 ## [2.4.5] - 2023-04-09
917 - Use monotonic high resolution timer for worker tasks runtime.
918 - Add worker tasks median runtime to statistics.
919 - Add worker tasks queue (experimental).
921 ## [2.4.4] - 2023-04-07
925 - Add `PoolEvents` enumeration and `PoolEvent` type.
929 - Destroy worker only on alive check.
931 ## [2.4.3] - 2023-04-07
935 - Fix typedoc generation with inheritance.
937 ## [2.4.2] - 2023-04-06
941 - Add `full` event to dynamic pool.
942 - Keep worker choice strategy in memory for conditional reuse.
946 - Fix possible negative worker key at worker removal in worker choice strategies.
948 ## [2.4.1] - 2023-04-05
952 - Optimize worker choice strategy for dynamic pool.
956 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
958 ## [2.4.0] - 2023-04-04
962 - Add `LESS_BUSY` worker choice strategy.
966 - Optimize worker storage in pool.
967 - Optimize worker alive status check.
968 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
969 - Optimize `LESS_USED` worker choice strategy.
970 - Update benchmark versus external threads pools.
971 - Optimize tasks usage statistics requirements for worker choice strategy.
975 - Ensure trimmable characters are checked at pool initialization.
976 - Fix message id integer overflow.
977 - Fix pool worker removal in worker choice strategy internals.
978 - Fix package publication with pnpm.
980 ## [2.4.0-3] - 2023-04-04
984 - Add `LESS_BUSY` worker choice strategy.
988 - Optimize worker storage in pool.
989 - Optimize worker alive status check.
990 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
991 - Optimize `LESS_USED` worker choice strategy.
992 - Update benchmark versus external threads pools.
996 - Ensure trimmable characters are checked at pool initialization.
997 - Fix message id integer overflow.
998 - Fix pool worker removal in worker choice strategy internals.
999 - Fix package publication with pnpm.
1001 ## [2.4.0-2] - 2023-04-03
1005 - Add `LESS_BUSY` worker choice strategy.
1009 - Optimize worker storage in pool.
1010 - Optimize worker alive status check.
1011 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1012 - Optimize `LESS_USED` worker choice strategy.
1016 - Ensure trimmable characters are checked at pool initialization.
1017 - Fix message id integer overflow.
1018 - Fix pool worker removal in worker choice strategy internals.
1019 - Fix package publication with pnpm.
1021 ## [2.4.0-1] - 2023-04-03
1025 - Add `LESS_BUSY` worker choice strategy.
1029 - Optimize worker storage in pool.
1030 - Optimize worker alive status check.
1031 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1032 - Optimize `LESS_USED` worker choice strategy.
1036 - Ensure trimmable characters are checked at pool initialization.
1037 - Fix message id integer overflow.
1038 - Fix pool worker removal in worker choice strategy internals.
1040 ## [2.4.0-0] - 2023-04-03
1044 - Add `LESS_BUSY` worker choice strategy.
1048 - Optimize worker storage in pool.
1049 - Optimize worker alive status check.
1050 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1051 - Optimize `LESS_USED` worker choice strategy.
1055 - Ensure trimmable characters are checked at pool initialization.
1056 - Fix message id integer overflow.
1057 - Fix pool worker removal in worker choice strategy internals.
1059 ## [2.3.10] - 2023-03-18
1063 - Fix package.json `exports` syntax for ESM and CommonJS.
1067 - Permit SemVer pre-release publication.
1069 ## [2.3.10-2] - 2023-03-18
1073 - Fix package.json `exports` syntax for ESM and CommonJS.
1075 ## [2.3.10-1] - 2023-03-18
1079 - Permit SemVer pre-release publication.
1081 ## [2.3.10-0] - 2023-03-18
1085 - Fix package.json `exports` syntax for ESM and CommonJS.
1087 ## [2.3.9] - 2023-03-18
1091 - Introduce ESM module support along with CommonJS one.
1095 - Fix brown paper bag bug referencing the same object literal.
1097 ## [2.3.8] - 2023-03-18
1101 - Switch internal benchmarking code to benny.
1102 - Switch to TypeScript 5.x.x.
1103 - Switch rollup bundler plugins to core ones.
1104 - Switch to TSDoc syntax.
1105 - Enforce conventional commits.
1109 - Fix random integer generator.
1110 - Fix worker choice strategy pool type identification at initialization.
1112 ## [2.3.7] - 2022-10-23
1116 - Switch to open collective FOSS project funding platform.
1117 - Switch to ts-standard linter configuration on TypeScript code.
1121 - Fixed missing async on pool execute method.
1122 - Fixed typing in TypeScript example.
1123 - Fixed types in unit tests.
1125 ## [2.3.6] - 2022-10-22
1129 - Cleanup pool attributes and methods.
1130 - Refine error types thrown.
1134 - Fix continuous integration build on windows.
1135 - Fix code coverage reporting by using c8 instead of nyc.
1137 ## [2.3.5] - 2022-10-21
1141 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
1142 - Optimize tasks usage lookup implementation.
1146 - Fix missed pool event emitter type export.
1147 - Fix typedoc documentation generation.
1149 ## [2.3.4] - 2022-10-17
1153 - Fully automate release process with release-it.
1157 - Optimize fair share task scheduling algorithm implementation.
1158 - Update benchmark versus external pools results with latest version.
1160 ## [2.3.3] - 2022-10-15
1164 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
1166 ## [2.3.2] - 2022-10-14
1170 - Optimize fair share worker selection strategy implementation.
1174 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
1176 ## [2.3.1] - 2022-10-13
1180 - Pool worker choice strategies:
1181 - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
1182 - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
1184 ## [2.2.2] - 2022-10-09
1188 - Fixed `README.md` file.
1190 ## [2.2.1] - 2022-10-08
1194 - Dynamic worker choice strategy change at runtime.
1196 ## [2.2.0] - 2022-01-05
1198 ### Breaking Changes
1200 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
1202 ## [2.1.0] - 2021-08-29
1206 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
1208 ### Breaking Changes
1210 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
1211 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
1212 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
1213 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
1215 ## [2.0.2] - 2021-05-12
1219 - Fix `busy` event emission on fixed pool type
1221 ## [2.0.1] - 2021-03-16
1225 - Check if pool options are properly set.
1226 - `busy` event is emitted on all pool types.
1228 ## [2.0.0] - 2021-03-01
1232 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1234 ### Breaking Changes
1236 - `FullPool` event is now renamed to `busy`.
1237 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1238 _Find more details on our JSDoc._
1240 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1242 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1244 ### Pool options types declaration merge
1246 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1248 #### New `export` strategy
1252 const DynamicThreadPool = require('poolifier/lib/dynamic')
1254 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1257 But you should always prefer just using
1260 const { DynamicThreadPool } = require('poolifier')
1263 #### New type definitions for input data and response
1265 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1266 _This is not a limitation by poolifier but Node.js._
1268 #### Public property replacements
1270 `numWorkers` property is now `numberOfWorkers`
1272 #### Internal (protected) properties and methods renaming
1274 These properties are not intended for end users
1276 - `id` => `nextMessageId`
1278 These methods are not intended for end users
1280 - `_chooseWorker` => `chooseWorker`
1281 - `_newWorker` => `createWorker`
1282 - `_execute` => `internalExecute`
1283 - `_chooseWorker` => `chooseWorker`
1284 - `_checkAlive` => `checkAlive`
1286 - `_runAsync` => `runAsync`
1288 ## [1.1.0] - 2020-05-21
1292 - ThreadWorker support async functions as option
1293 - Various external library patches
1295 ## [1.0.0] - 2020-01-24
1299 - FixedThreadPool implementation
1300 - DynamicThreadPool implementation
1301 - WorkerThread implementation to improve developer experience