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 ## [3.1.16] - 2024-01-03
14 - Add missing type to TS type definitions.
16 ## [3.1.15] - 2024-01-02
20 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
22 ## [3.1.15-0] - 2024-01-02
26 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
28 ## [3.1.14] - 2024-01-01
32 - Properly handle dynamic pool with zero minimum size.
34 ## [3.1.13] - 2023-12-30
38 - Reduce branching in several hot code paths.
39 - Use faster object cloning implementation.
41 ## [3.1.12] - 2023-12-27
45 - Fix tasks redistribution triggers at pool destroying.
49 - Switch TypeScript module resolution to Node16.
51 ## [3.1.12-0] - 2023-12-27
55 - Fix tasks redistribution triggers at pool destroying.
57 ## [3.1.11] - 2023-12-24
61 - Avoid worker node cross tasks stealing.
62 - Ensure only half the pool worker nodes can steal tasks.
64 ## [3.1.10] - 2023-12-23
68 - Avoid useless branching on pool type.
70 ## [3.1.9] - 2023-12-22
74 - Readd ThreadPoolOptions and ClusterPoolOptions TS type aliases to PoolOptions.
76 ## [3.1.8] - 2023-12-21
80 - Fix default worker weight computation.
81 - Fix possible null exception at pool destroying.
83 ## [3.1.7] - 2023-12-20
87 - Ensure worker choice strategies implementation wait for worker node readiness: [#1748](https://github.com/poolifier/poolifier/issues/1748).
89 ## [3.1.6] - 2023-12-18
93 - Fix pool destroying with tasks queuing enabled.
95 ## [3.1.5] - 2023-12-18
99 - Add queued tasks end timeout support to worker node termination.
101 ## [3.1.4] - 2023-12-18
105 - Make more robust the fix for possible null exception at handling task execution response.
107 ## [3.1.3] - 2023-12-17
111 - Fix possible null exception at handling task execution response.
113 ## [3.1.2] - 2023-12-17
117 - Wait for queued tasks to end at worker node termination.
119 ## [3.1.1] - 2023-12-16
123 - Fix pool options TS type definition.
125 ## [3.1.0] - 2023-12-16
129 - TypeScript breaking change: merge ThreadPoolOptions and ClusterPoolOptions types into PoolOptions type.
131 ## [3.0.14] - 2023-12-13
135 - Fix possible null exception with worker_threads pools.
137 ## [3.0.13] - 2023-12-12
141 - Ensure worker choice strategy wait for worker nodes readiness.
145 - Remove infinite retries support in worker choice strategy to avoid configuration leading to possible infinite recursion or loop.
147 ## [3.0.12] - 2023-12-12
151 - Add infinite retries support in worker choice strategy.
153 ## [3.0.11] - 2023-12-11
157 - Ensure pool asynchronous resource properly track tasks execution.
159 ## [3.0.10] - 2023-12-08
163 - Add a fastpath when tasks stealing or redistribution is impossible.
165 ## [3.0.9] - 2023-11-26
169 - Remove all pool events listener at pool destroying.
170 - Remove all worker node events listener at worker node destroying.
171 - Fix worker node event emitter listeners handling memory leak at pool options runtime change.
173 ## [3.0.8] - 2023-11-25
177 - Ensure continuous tasks stealing on idle start at worker node idling.
179 ## [3.0.7] - 2023-11-24
183 - Make continuous tasks stealing start at worker node idling.
185 ## [3.0.6] - 2023-11-24
189 - Ensure pool statuses are checked at initialization, `start()` or `destroy()`.
190 - Ensure pool `ready` event can be emitted after several `start()/destroy()` cycles.
192 ## [3.0.5] - 2023-10-27
196 - Ensure pool `ready` event can be emitted only once.
198 ## [3.0.4] - 2023-10-20
202 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
203 - Use builtin retry mechanism in worker choice strategies instead of custom one.
205 ## [3.0.3] - 2023-10-19
209 - Avoid null exception at sending message to worker.
210 - Avoid null exception at checking worker node readiness.
212 ## [3.0.2] - 2023-10-17
216 - 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).
218 ## [3.0.1] - 2023-10-16
222 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
226 - Switch the worker node eventing code to `EventTarget` API.
228 ## [3.0.0] - 2023-10-08
232 - Remove Node.js 16.x.x (EOL) support.
234 ## [2.7.5] - 2023-10-03
238 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
240 ## [2.7.4] - 2023-09-25
244 - Fix source maps (bundler issue).
246 ## [2.7.3] - 2023-09-24
250 - Convert pool event emitter to event emitter async resource.
252 ## [2.7.2] - 2023-09-23
256 - Add source maps to npm package to ease debugging.
260 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
262 ## [2.7.1] - 2023-09-20
266 - Ensure worker message listener used one time are removed after usage.
268 ## [2.7.0] - 2023-09-19
272 - Fix task stealing related tasks queue options handling at runtime.
276 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
280 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
281 - Stricter worker constructor arguments validation.
283 ## [2.6.45] - 2023-09-17
287 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
291 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
292 - Add `start()` method to pool API to start the minimum number of workers.
293 - 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.
294 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
296 ## [2.6.44] - 2023-09-08
300 - Use a dedicated PAT to publish on GitHub packages registry.
304 - Publish on GitHub packages registry on release.
308 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
310 ## [2.6.43] - 2023-09-08
314 - Publish on GitHub packages registry on release.
318 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
320 ## [2.6.42] - 2023-09-06
324 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
326 ## [2.6.41] - 2023-09-03
330 - Optimize worker choice strategies implementation.
332 ## [2.6.40] - 2023-09-01
336 - Do not pre-choose in WRR worker choice strategy to avoid bias.
337 - Avoid array out of bound in worker choice strategies after worker node removal.
339 ## [2.6.39] - 2023-08-30
343 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
345 ## [2.6.38] - 2023-08-30
349 - Bundle typescript types declaration into one file.
353 - Improve interleaved weighted round robin worker choice strategy implementation.
355 ## [2.6.37] - 2023-08-28
359 - Ensure unused worker usage statistics are deleted at runtime.
363 - Rename worker choice strategy options `choiceRetries` to `retries`.
364 - Avoid unnecessary branching in worker choice strategies.
366 ## [2.6.36] - 2023-08-27
370 - Fix pool `execute()` arguments check.
374 - Make continuous tasks stealing algorithm less aggressive.
375 - Fine tune tasks stealing algorithm under back pressure.
377 ## [2.6.35] - 2023-08-25
381 - Don't account worker usage statistics for tasks that have failed.
382 - Fix pool information runtime and wait time median computation.
386 - Update simple moving average implementation to use a circular buffer.
387 - Update simple moving median implementation to use a circular buffer.
388 - Account for stolen tasks in worker usage statistics and pool information.
392 - Continuous tasks stealing algorithm.
394 ## [2.6.34] - 2023-08-24
398 - Avoid cascading tasks stealing under back pressure.
402 - Add fastpath to queued tasks rescheduling.
404 ## [2.6.33] - 2023-08-24
408 - Fix queued tasks rescheduling.
412 - Rename tasks queue options `queueMaxSize` to `size`.
416 - Task stealing scheduling algorithm if tasks queueing is enabled.
418 ## [2.6.32] - 2023-08-23
422 - Ensure no task can be executed when the pool is destroyed.
426 - Add `queueMaxSize` option to tasks queue options.
427 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
428 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
430 ## [2.6.31] - 2023-08-20
434 - Fix worker choice strategy retries mechanism in some edge cases.
438 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
439 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
441 ## [2.6.30] - 2023-08-19
445 - Ensure pool event `backPressure` is emitted.
446 - Ensure pool event `full` is emitted only once.
447 - Ensure worker node cannot be instantiated without proper arguments.
449 ## [2.6.29] - 2023-08-18
453 - Fix race condition between readiness and task functions worker message handling at startup.
454 - Fix duplicate task function worker usage statistics computation per task function.
455 - Update task function worker usage statistics if and only if there's at least two different task functions.
456 - Fix race condition at task function worker usage executing task computation leading to negative value.
460 - 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).
461 - Use back pressure detection in worker choice strategies.
462 - Add worker choice strategies retries mechanism if no worker is eligible.
464 ## [2.6.28] - 2023-08-16
468 - Ensure pool workers are properly initialized.
472 - HTTP server pool examples: express-cluster, express-hybrid.
476 - Remove now useless branching in worker hot code path.
478 ## [2.6.27] - 2023-08-15
482 - Add `KillHandler` type definition to exported types.
486 - Add `destroy` event to pool API.
488 ## [2.6.26] - 2023-08-15
492 - Add kill handler to worker options allowing to execute custom code when worker is killed.
493 - Add `listTaskFunctions()` method to pool API.
494 - SMTP client pool example: nodemailer.
496 ## [2.6.25] - 2023-08-13
500 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
501 - WebSocket server pool examples: ws-cluster, ws-hybrid.
503 ## [2.6.24] - 2023-08-12
507 - Add array of transferable objects to the `execute()` method arguments.
508 - WebSocket server pool examples: ws-worker_threads.
510 ## [2.6.23] - 2023-08-11
514 - 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.
518 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
519 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
521 ## [2.6.22] - 2023-08-10
525 - Add missing `types` field to package.json `exports`.
529 - Structure markdown documentation (PR #811).
531 ## [2.6.21] - 2023-08-03
535 - Improve code documentation.
536 - Code refactoring and cleanup for better maintainability and readability.
538 ## [2.6.20] - 2023-07-21
542 - Fix queued tasks redistribution on error task execution starvation.
543 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
547 - Drastically reduce lookups by worker in the worker nodes.
549 ## [2.6.19] - 2023-07-20
553 - Dedicated internal communication channel for worker_threads pools.
555 ## [2.6.18] - 2023-07-19
559 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
561 ## [2.6.17] - 2023-07-16
565 - Add `listTaskFunctions()` method to worker API.
567 ## [2.6.16] - 2023-07-12
571 - Fix pool startup detection.
572 - Fix worker task functions handling.
574 ## [2.6.15] - 2023-07-11
578 - Take into account worker node readiness in worker choice strategies.
580 ## [2.6.14] - 2023-07-10
584 - Fix task function statistics tracking.
586 ## [2.6.13] - 2023-07-10
590 - Add per task function statistics tracking.
591 - Add public methods to manipulate the worker task functions at runtime.
593 ## [2.6.12] - 2023-07-09
597 - Workaround import issue with `node:os` module in node 16.x.x.
599 ## [2.6.11] - 2023-07-09
603 - Fix pool readiness semantic.
605 ## [2.6.10] - 2023-07-08
609 - Ensure workers are not recreated on error at pool startup.
613 - Add `ready` and `strategy` fields to pool information.
614 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
615 - Add dynamic pool sizing checks.
617 ## [2.6.9] - 2023-07-07
621 - Recreate the right worker type on uncaught exception.
625 - Add minimum and maximum to internal measurement statistics.
626 - Add `runTime` and `waitTime` to pool information.
627 - Check worker inactive time only on dynamic worker.
629 ## [2.6.8] - 2023-07-03
633 - Brown paper bag release to fix version handling in pool information.
635 ## [2.6.7] - 2023-07-03
639 - Ensure worker queued tasks at error are reassigned to other pool workers.
643 - Add pool `utilization` ratio to pool information.
644 - Add `version` to pool information.
645 - Add worker information to worker nodes.
647 ## [2.6.6] - 2023-07-01
651 - Add safe helper `availableParallelism()` to help sizing the pool.
655 - Ensure message handler is only registered in worker.
657 ## [2.6.5] - 2023-06-27
661 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
665 - Artificial version bump to 2.6.5 to workaround publication issue.
666 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
667 - Ensure pool event is emitted before task error promise rejection.
668 - Fix queued tasks count computation.
672 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
674 ## [2.6.4] - 2023-06-27
678 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
682 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
683 - Ensure pool event is emitted before task error promise rejection.
684 - Fix queued tasks count computation.
688 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
690 ## [2.6.3] - 2023-06-19
694 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
695 - Update strategies internals after statistics computation.
699 - Optimize O(1) queue implementation.
701 ## [2.6.2] - 2023-06-12
705 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
707 ## [2.6.1] - 2023-06-10
711 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
715 - Fix average statistics computation: ensure failed tasks are not accounted.
717 ## [2.6.0] - 2023-06-09
721 - Add `LEAST_ELU` worker choice strategy (experimental).
722 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
726 - Refactor pool worker node usage internals.
727 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
728 - Breaking change: pool information `info` property object fields have been renamed.
732 - Fix wait time accounting.
733 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
734 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
736 ## [2.5.4] - 2023-06-07
740 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
744 - Compute statistics at the worker level only if needed.
745 - Add `worker_threads` options to thread pool options.
749 - Make the `LEAST_BUSY` strategy only relies on task runtime.
751 ## [2.5.3] - 2023-06-04
755 - Refine pool information content.
756 - Limit pool internals public exposure.
758 ## [2.5.2] - 2023-06-02
762 - Add `taskError` pool event for task execution error.
763 - Add pool information `info` property to pool.
764 - Emit pool information on `busy` and `full` pool events.
766 ## [2.5.1] - 2023-06-01
770 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
771 - Add `error` pool event for uncaught worker error.
773 ## [2.5.0] - 2023-05-31
777 - Switch pool event emitter to `EventEmitterAsyncResource`.
778 - Add tasks wait time accounting in per worker tasks usage.
779 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
783 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
785 ## [2.4.14] - 2023-05-09
789 - Ensure no undefined task runtime can land in the tasks history.
790 - Fix median computation implementation once again.
794 - Unit tests for median and queue implementations.
796 ## [2.4.13] - 2023-05-08
800 - Fix worker choice strategy options validation.
801 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
803 ## [2.4.12] - 2023-05-06
807 - Support multiple task functions per worker.
808 - Add custom worker weights support to worker choice strategies options.
812 - Use O(1) queue implementation for tasks queueing.
816 - Fix median computation implementation.
817 - Fix fair share worker choice strategy internals update.
819 ## [2.4.11] - 2023-04-23
823 - Optimize free worker finding in worker choice strategies.
825 ## [2.4.10] - 2023-04-15
829 - Fix typescript type definition for task function: ensure the input data is optional.
830 - Fix typescript type definition for pool execute(): ensure the input data is optional.
832 ## [2.4.9] - 2023-04-15
836 - Add tasks queue enablement runtime setter to pool.
837 - Add tasks queue options runtime setter to pool.
838 - Add worker choice strategy options runtime setter to pool.
842 - Remove the tasks queuing experimental status.
846 - Fix task function type definition and validation.
847 - Fix worker choice strategy options handling.
849 ## [2.4.8] - 2023-04-12
853 - Fix message between main worker and worker type definition for tasks.
854 - Fix code documentation.
856 ## [2.4.7] - 2023-04-11
860 - Add worker tasks queue options to pool options.
864 - Fix missing documentation.
866 ## [2.4.6] - 2023-04-10
870 - Ensure one task at a time is executed per worker with tasks queueing enabled.
871 - Properly count worker executing tasks with tasks queueing enabled.
873 ## [2.4.5] - 2023-04-09
877 - Use monotonic high resolution timer for worker tasks runtime.
878 - Add worker tasks median runtime to statistics.
879 - Add worker tasks queue (experimental).
881 ## [2.4.4] - 2023-04-07
885 - Add `PoolEvents` enumeration and `PoolEvent` type.
889 - Destroy worker only on alive check.
891 ## [2.4.3] - 2023-04-07
895 - Fix typedoc generation with inheritance.
897 ## [2.4.2] - 2023-04-06
901 - Add `full` event to dynamic pool.
902 - Keep worker choice strategy in memory for conditional reuse.
906 - Fix possible negative worker key at worker removal in worker choice strategies.
908 ## [2.4.1] - 2023-04-05
912 - Optimize worker choice strategy for dynamic pool.
916 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
918 ## [2.4.0] - 2023-04-04
922 - Add `LESS_BUSY` worker choice strategy.
926 - Optimize worker storage in pool.
927 - Optimize worker alive status check.
928 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
929 - Optimize `LESS_USED` worker choice strategy.
930 - Update benchmark versus external threads pools.
931 - Optimize tasks usage statistics requirements for worker choice strategy.
935 - Ensure trimmable characters are checked at pool initialization.
936 - Fix message id integer overflow.
937 - Fix pool worker removal in worker choice strategy internals.
938 - Fix package publication with pnpm.
940 ## [2.4.0-3] - 2023-04-04
944 - Add `LESS_BUSY` worker choice strategy.
948 - Optimize worker storage in pool.
949 - Optimize worker alive status check.
950 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
951 - Optimize `LESS_USED` worker choice strategy.
952 - Update benchmark versus external threads pools.
956 - Ensure trimmable characters are checked at pool initialization.
957 - Fix message id integer overflow.
958 - Fix pool worker removal in worker choice strategy internals.
959 - Fix package publication with pnpm.
961 ## [2.4.0-2] - 2023-04-03
965 - Add `LESS_BUSY` worker choice strategy.
969 - Optimize worker storage in pool.
970 - Optimize worker alive status check.
971 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
972 - Optimize `LESS_USED` worker choice strategy.
976 - Ensure trimmable characters are checked at pool initialization.
977 - Fix message id integer overflow.
978 - Fix pool worker removal in worker choice strategy internals.
979 - Fix package publication with pnpm.
981 ## [2.4.0-1] - 2023-04-03
985 - Add `LESS_BUSY` worker choice strategy.
989 - Optimize worker storage in pool.
990 - Optimize worker alive status check.
991 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
992 - Optimize `LESS_USED` worker choice strategy.
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.
1000 ## [2.4.0-0] - 2023-04-03
1004 - Add `LESS_BUSY` worker choice strategy.
1008 - Optimize worker storage in pool.
1009 - Optimize worker alive status check.
1010 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1011 - Optimize `LESS_USED` worker choice strategy.
1015 - Ensure trimmable characters are checked at pool initialization.
1016 - Fix message id integer overflow.
1017 - Fix pool worker removal in worker choice strategy internals.
1019 ## [2.3.10] - 2023-03-18
1023 - Fix package.json `exports` syntax for ESM and CommonJS.
1027 - Permit SemVer pre-release publication.
1029 ## [2.3.10-2] - 2023-03-18
1033 - Fix package.json `exports` syntax for ESM and CommonJS.
1035 ## [2.3.10-1] - 2023-03-18
1039 - Permit SemVer pre-release publication.
1041 ## [2.3.10-0] - 2023-03-18
1045 - Fix package.json `exports` syntax for ESM and CommonJS.
1047 ## [2.3.9] - 2023-03-18
1051 - Introduce ESM module support along with CommonJS one.
1055 - Fix brown paper bag bug referencing the same object literal.
1057 ## [2.3.8] - 2023-03-18
1061 - Switch internal benchmarking code to benny.
1062 - Switch to TypeScript 5.x.x.
1063 - Switch rollup bundler plugins to core ones.
1064 - Switch to TSDoc syntax.
1065 - Enforce conventional commits.
1069 - Fix random integer generator.
1070 - Fix worker choice strategy pool type identification at initialization.
1072 ## [2.3.7] - 2022-10-23
1076 - Switch to open collective FOSS project funding platform.
1077 - Switch to ts-standard linter configuration on TypeScript code.
1081 - Fixed missing async on pool execute method.
1082 - Fixed typing in TypeScript example.
1083 - Fixed types in unit tests.
1085 ## [2.3.6] - 2022-10-22
1089 - Cleanup pool attributes and methods.
1090 - Refine error types thrown.
1094 - Fix continuous integration build on windows.
1095 - Fix code coverage reporting by using c8 instead of nyc.
1097 ## [2.3.5] - 2022-10-21
1101 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
1102 - Optimize tasks usage lookup implementation.
1106 - Fix missed pool event emitter type export.
1107 - Fix typedoc documentation generation.
1109 ## [2.3.4] - 2022-10-17
1113 - Fully automate release process with release-it.
1117 - Optimize fair share task scheduling algorithm implementation.
1118 - Update benchmark versus external pools results with latest version.
1120 ## [2.3.3] - 2022-10-15
1124 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
1126 ## [2.3.2] - 2022-10-14
1130 - Optimize fair share worker selection strategy implementation.
1134 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
1136 ## [2.3.1] - 2022-10-13
1140 - Pool worker choice strategies:
1141 - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
1142 - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
1144 ## [2.2.2] - 2022-10-09
1148 - Fixed `README.md` file.
1150 ## [2.2.1] - 2022-10-08
1154 - Dynamic worker choice strategy change at runtime.
1156 ## [2.2.0] - 2022-01-05
1158 ### Breaking Changes
1160 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
1162 ## [2.1.0] - 2021-08-29
1166 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
1168 ### Breaking Changes
1170 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
1171 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
1172 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
1173 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
1175 ## [2.0.2] - 2021-05-12
1179 - Fix `busy` event emission on fixed pool type
1181 ## [2.0.1] - 2021-03-16
1185 - Check if pool options are properly set.
1186 - `busy` event is emitted on all pool types.
1188 ## [2.0.0] - 2021-03-01
1192 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1194 ### Breaking Changes
1196 - `FullPool` event is now renamed to `busy`.
1197 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1198 _Find more details on our JSDoc._
1200 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1202 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1204 ### Pool options types declaration merge
1206 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1208 #### New `export` strategy
1212 const DynamicThreadPool = require('poolifier/lib/dynamic')
1214 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1217 But you should always prefer just using
1220 const { DynamicThreadPool } = require('poolifier')
1223 #### New type definitions for input data and response
1225 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1226 _This is not a limitation by poolifier but Node.js._
1228 #### Public property replacements
1230 `numWorkers` property is now `numberOfWorkers`
1232 #### Internal (protected) properties and methods renaming
1234 These properties are not intended for end users
1236 - `id` => `nextMessageId`
1238 These methods are not intended for end users
1240 - `_chooseWorker` => `chooseWorker`
1241 - `_newWorker` => `createWorker`
1242 - `_execute` => `internalExecute`
1243 - `_chooseWorker` => `chooseWorker`
1244 - `_checkAlive` => `checkAlive`
1246 - `_runAsync` => `runAsync`
1248 ## [1.1.0] - 2020-05-21
1252 - ThreadWorker support async functions as option
1253 - Various external library patches
1255 ## [1.0.0] - 2020-01-24
1259 - FixedThreadPool implementation
1260 - DynamicThreadPool implementation
1261 - WorkerThread implementation to improve developer experience