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 - Ensure worker choice strategy wait for worker nodes readiness.
16 - Remove infinite retries support in worker choice strategy to avoid configuration leading to possible infinite recursion or loop.
18 ## [3.0.12] - 2023-12-12
22 - Add infinite retries support in worker choice strategy.
24 ## [3.0.11] - 2023-12-11
28 - Ensure pool asynchronous resource properly track tasks execution
30 ## [3.0.10] - 2023-12-08
34 - Add a fastpath when tasks stealing or redistribution is impossible
36 ## [3.0.9] - 2023-11-26
40 - Remove all pool events listener at pool destroying.
41 - Remove all worker node events listener at worker node destroying.
42 - Fix worker node event emitter listeners handling memory leak at pool options runtime change.
44 ## [3.0.8] - 2023-11-25
48 - Ensure continuous tasks stealing on idle start at worker node idling
50 ## [3.0.7] - 2023-11-24
54 - Make continuous tasks stealing start at worker node idling.
56 ## [3.0.6] - 2023-11-24
60 - Ensure pool statuses are checked at initialization, `start()` or `destroy()`.
61 - Ensure pool `ready` event can be emitted after several `start()/destroy()` cycles.
63 ## [3.0.5] - 2023-10-27
67 - Ensure pool `ready` event can be emitted only once.
69 ## [3.0.4] - 2023-10-20
73 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
74 - Use builtin retry mechanism in worker choice strategies instead of custom one.
76 ## [3.0.3] - 2023-10-19
80 - Avoid null exception at sending message to worker.
81 - Avoid null exception at checking worker node readiness.
83 ## [3.0.2] - 2023-10-17
87 - 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).
89 ## [3.0.1] - 2023-10-16
93 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
97 - Switch the worker node eventing code to `EventTarget` API.
99 ## [3.0.0] - 2023-10-08
103 - Remove Node.js 16.x.x (EOL) support.
105 ## [2.7.5] - 2023-10-03
109 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
111 ## [2.7.4] - 2023-09-25
115 - Fix source maps (bundler issue).
117 ## [2.7.3] - 2023-09-24
121 - Convert pool event emitter to event emitter async resource.
123 ## [2.7.2] - 2023-09-23
127 - Add source maps to npm package to ease debugging.
131 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
133 ## [2.7.1] - 2023-09-20
137 - Ensure worker message listener used one time are removed after usage.
139 ## [2.7.0] - 2023-09-19
143 - Fix task stealing related tasks queue options handling at runtime.
147 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
151 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
152 - Stricter worker constructor arguments validation.
154 ## [2.6.45] - 2023-09-17
158 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
162 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
163 - Add `start()` method to pool API to start the minimum number of workers.
164 - 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.
165 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
167 ## [2.6.44] - 2023-09-08
171 - Use a dedicated PAT to publish on GitHub packages registry.
175 - Publish on GitHub packages registry on release.
179 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
181 ## [2.6.43] - 2023-09-08
185 - Publish on GitHub packages registry on release.
189 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
191 ## [2.6.42] - 2023-09-06
195 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
197 ## [2.6.41] - 2023-09-03
201 - Optimize worker choice strategies implementation.
203 ## [2.6.40] - 2023-09-01
207 - Do not pre-choose in WRR worker choice strategy to avoid bias.
208 - Avoid array out of bound in worker choice strategies after worker node removal.
210 ## [2.6.39] - 2023-08-30
214 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
216 ## [2.6.38] - 2023-08-30
220 - Bundle typescript types declaration into one file.
224 - Improve interleaved weighted round robin worker choice strategy implementation.
226 ## [2.6.37] - 2023-08-28
230 - Ensure unused worker usage statistics are deleted at runtime.
234 - Rename worker choice strategy options `choiceRetries` to `retries`.
235 - Avoid unnecessary branching in worker choice strategies.
237 ## [2.6.36] - 2023-08-27
241 - Fix pool `execute()` arguments check.
245 - Make continuous tasks stealing algorithm less aggressive.
246 - Fine tune tasks stealing algorithm under back pressure.
248 ## [2.6.35] - 2023-08-25
252 - Don't account worker usage statistics for tasks that have failed.
253 - Fix pool information runtime and wait time median computation.
257 - Update simple moving average implementation to use a circular buffer.
258 - Update simple moving median implementation to use a circular buffer.
259 - Account for stolen tasks in worker usage statistics and pool information.
263 - Continuous tasks stealing algorithm.
265 ## [2.6.34] - 2023-08-24
269 - Avoid cascading tasks stealing under back pressure.
273 - Add fastpath to queued tasks rescheduling.
275 ## [2.6.33] - 2023-08-24
279 - Fix queued tasks rescheduling.
283 - Rename tasks queue options `queueMaxSize` to `size`.
287 - Task stealing scheduling algorithm if tasks queueing is enabled.
289 ## [2.6.32] - 2023-08-23
293 - Ensure no task can be executed when the pool is destroyed.
297 - Add `queueMaxSize` option to tasks queue options.
298 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
299 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
301 ## [2.6.31] - 2023-08-20
305 - Fix worker choice strategy retries mechanism in some edge cases.
309 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
310 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
312 ## [2.6.30] - 2023-08-19
316 - Ensure pool event `backPressure` is emitted.
317 - Ensure pool event `full` is emitted only once.
318 - Ensure worker node cannot be instantiated without proper arguments.
320 ## [2.6.29] - 2023-08-18
324 - Fix race condition between readiness and task functions worker message handling at startup.
325 - Fix duplicate task function worker usage statistics computation per task function.
326 - Update task function worker usage statistics if and only if there's at least two different task functions.
327 - Fix race condition at task function worker usage executing task computation leading to negative value.
331 - 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).
332 - Use back pressure detection in worker choice strategies.
333 - Add worker choice strategies retries mechanism if no worker is eligible.
335 ## [2.6.28] - 2023-08-16
339 - Ensure pool workers are properly initialized.
343 - HTTP server pool examples: express-cluster, express-hybrid.
347 - Remove now useless branching in worker hot code path.
349 ## [2.6.27] - 2023-08-15
353 - Add `KillHandler` type definition to exported types.
357 - Add `destroy` event to pool API.
359 ## [2.6.26] - 2023-08-15
363 - Add kill handler to worker options allowing to execute custom code when worker is killed.
364 - Add `listTaskFunctions()` method to pool API.
365 - SMTP client pool example: nodemailer.
367 ## [2.6.25] - 2023-08-13
371 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
372 - WebSocket server pool examples: ws-cluster, ws-hybrid.
374 ## [2.6.24] - 2023-08-12
378 - Add array of transferable objects to the `execute()` method arguments.
379 - WebSocket server pool examples: ws-worker_threads.
381 ## [2.6.23] - 2023-08-11
385 - 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.
389 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
390 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
392 ## [2.6.22] - 2023-08-10
396 - Add missing `types` field to package.json `exports`.
400 - Structure markdown documentation (PR #811).
402 ## [2.6.21] - 2023-08-03
406 - Improve code documentation.
407 - Code refactoring and cleanup for better maintainability and readability.
409 ## [2.6.20] - 2023-07-21
413 - Fix queued tasks redistribution on error task execution starvation.
414 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
418 - Drastically reduce lookups by worker in the worker nodes.
420 ## [2.6.19] - 2023-07-20
424 - Dedicated internal communication channel for worker_threads pools.
426 ## [2.6.18] - 2023-07-19
430 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
432 ## [2.6.17] - 2023-07-16
436 - Add `listTaskFunctions()` method to worker API.
438 ## [2.6.16] - 2023-07-12
442 - Fix pool startup detection.
443 - Fix worker task functions handling.
445 ## [2.6.15] - 2023-07-11
449 - Take into account worker node readiness in worker choice strategies.
451 ## [2.6.14] - 2023-07-10
455 - Fix task function statistics tracking.
457 ## [2.6.13] - 2023-07-10
461 - Add per task function statistics tracking.
462 - Add public methods to manipulate the worker task functions at runtime.
464 ## [2.6.12] - 2023-07-09
468 - Workaround import issue with `node:os` module in node 16.x.x.
470 ## [2.6.11] - 2023-07-09
474 - Fix pool readiness semantic.
476 ## [2.6.10] - 2023-07-08
480 - Ensure workers are not recreated on error at pool startup.
484 - Add `ready` and `strategy` fields to pool information.
485 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
486 - Add dynamic pool sizing checks.
488 ## [2.6.9] - 2023-07-07
492 - Recreate the right worker type on uncaught exception.
496 - Add minimum and maximum to internal measurement statistics.
497 - Add `runTime` and `waitTime` to pool information.
498 - Check worker inactive time only on dynamic worker.
500 ## [2.6.8] - 2023-07-03
504 - Brown paper bag release to fix version handling in pool information.
506 ## [2.6.7] - 2023-07-03
510 - Ensure worker queued tasks at error are reassigned to other pool workers.
514 - Add pool `utilization` ratio to pool information.
515 - Add `version` to pool information.
516 - Add worker information to worker nodes.
518 ## [2.6.6] - 2023-07-01
522 - Add safe helper `availableParallelism()` to help sizing the pool.
526 - Ensure message handler is only registered in worker.
528 ## [2.6.5] - 2023-06-27
532 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
536 - Artificial version bump to 2.6.5 to workaround publication issue.
537 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
538 - Ensure pool event is emitted before task error promise rejection.
539 - Fix queued tasks count computation.
543 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
545 ## [2.6.4] - 2023-06-27
549 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
553 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
554 - Ensure pool event is emitted before task error promise rejection.
555 - Fix queued tasks count computation.
559 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
561 ## [2.6.3] - 2023-06-19
565 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
566 - Update strategies internals after statistics computation.
570 - Optimize O(1) queue implementation.
572 ## [2.6.2] - 2023-06-12
576 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
578 ## [2.6.1] - 2023-06-10
582 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
586 - Fix average statistics computation: ensure failed tasks are not accounted.
588 ## [2.6.0] - 2023-06-09
592 - Add `LEAST_ELU` worker choice strategy (experimental).
593 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
597 - Refactor pool worker node usage internals.
598 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
599 - Breaking change: pool information `info` property object fields have been renamed.
603 - Fix wait time accounting.
604 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
605 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
607 ## [2.5.4] - 2023-06-07
611 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
615 - Compute statistics at the worker level only if needed.
616 - Add `worker_threads` options to thread pool options.
620 - Make the `LEAST_BUSY` strategy only relies on task runtime.
622 ## [2.5.3] - 2023-06-04
626 - Refine pool information content.
627 - Limit pool internals public exposure.
629 ## [2.5.2] - 2023-06-02
633 - Add `taskError` pool event for task execution error.
634 - Add pool information `info` property to pool.
635 - Emit pool information on `busy` and `full` pool events.
637 ## [2.5.1] - 2023-06-01
641 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
642 - Add `error` pool event for uncaught worker error.
644 ## [2.5.0] - 2023-05-31
648 - Switch pool event emitter to `EventEmitterAsyncResource`.
649 - Add tasks wait time accounting in per worker tasks usage.
650 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
654 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
656 ## [2.4.14] - 2023-05-09
660 - Ensure no undefined task runtime can land in the tasks history.
661 - Fix median computation implementation once again.
665 - Unit tests for median and queue implementations.
667 ## [2.4.13] - 2023-05-08
671 - Fix worker choice strategy options validation.
672 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
674 ## [2.4.12] - 2023-05-06
678 - Support multiple task functions per worker.
679 - Add custom worker weights support to worker choice strategies options.
683 - Use O(1) queue implementation for tasks queueing.
687 - Fix median computation implementation.
688 - Fix fair share worker choice strategy internals update.
690 ## [2.4.11] - 2023-04-23
694 - Optimize free worker finding in worker choice strategies.
696 ## [2.4.10] - 2023-04-15
700 - Fix typescript type definition for task function: ensure the input data is optional.
701 - Fix typescript type definition for pool execute(): ensure the input data is optional.
703 ## [2.4.9] - 2023-04-15
707 - Add tasks queue enablement runtime setter to pool.
708 - Add tasks queue options runtime setter to pool.
709 - Add worker choice strategy options runtime setter to pool.
713 - Remove the tasks queuing experimental status.
717 - Fix task function type definition and validation.
718 - Fix worker choice strategy options handling.
720 ## [2.4.8] - 2023-04-12
724 - Fix message between main worker and worker type definition for tasks.
725 - Fix code documentation.
727 ## [2.4.7] - 2023-04-11
731 - Add worker tasks queue options to pool options.
735 - Fix missing documentation.
737 ## [2.4.6] - 2023-04-10
741 - Ensure one task at a time is executed per worker with tasks queueing enabled.
742 - Properly count worker executing tasks with tasks queueing enabled.
744 ## [2.4.5] - 2023-04-09
748 - Use monotonic high resolution timer for worker tasks runtime.
749 - Add worker tasks median runtime to statistics.
750 - Add worker tasks queue (experimental).
752 ## [2.4.4] - 2023-04-07
756 - Add `PoolEvents` enumeration and `PoolEvent` type.
760 - Destroy worker only on alive check.
762 ## [2.4.3] - 2023-04-07
766 - Fix typedoc generation with inheritance.
768 ## [2.4.2] - 2023-04-06
772 - Add `full` event to dynamic pool.
773 - Keep worker choice strategy in memory for conditional reuse.
777 - Fix possible negative worker key at worker removal in worker choice strategies.
779 ## [2.4.1] - 2023-04-05
783 - Optimize worker choice strategy for dynamic pool.
787 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
789 ## [2.4.0] - 2023-04-04
793 - Add `LESS_BUSY` worker choice strategy.
797 - Optimize worker storage in pool.
798 - Optimize worker alive status check.
799 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
800 - Optimize `LESS_USED` worker choice strategy.
801 - Update benchmark versus external threads pools.
802 - Optimize tasks usage statistics requirements for worker choice strategy.
806 - Ensure trimmable characters are checked at pool initialization.
807 - Fix message id integer overflow.
808 - Fix pool worker removal in worker choice strategy internals.
809 - Fix package publication with pnpm.
811 ## [2.4.0-3] - 2023-04-04
815 - Add `LESS_BUSY` worker choice strategy.
819 - Optimize worker storage in pool.
820 - Optimize worker alive status check.
821 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
822 - Optimize `LESS_USED` worker choice strategy.
823 - Update benchmark versus external threads pools.
827 - Ensure trimmable characters are checked at pool initialization.
828 - Fix message id integer overflow.
829 - Fix pool worker removal in worker choice strategy internals.
830 - Fix package publication with pnpm.
832 ## [2.4.0-2] - 2023-04-03
836 - Add `LESS_BUSY` worker choice strategy.
840 - Optimize worker storage in pool.
841 - Optimize worker alive status check.
842 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
843 - Optimize `LESS_USED` worker choice strategy.
847 - Ensure trimmable characters are checked at pool initialization.
848 - Fix message id integer overflow.
849 - Fix pool worker removal in worker choice strategy internals.
850 - Fix package publication with pnpm.
852 ## [2.4.0-1] - 2023-04-03
856 - Add `LESS_BUSY` worker choice strategy.
860 - Optimize worker storage in pool.
861 - Optimize worker alive status check.
862 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
863 - Optimize `LESS_USED` worker choice strategy.
867 - Ensure trimmable characters are checked at pool initialization.
868 - Fix message id integer overflow.
869 - Fix pool worker removal in worker choice strategy internals.
871 ## [2.4.0-0] - 2023-04-03
875 - Add `LESS_BUSY` worker choice strategy.
879 - Optimize worker storage in pool.
880 - Optimize worker alive status check.
881 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
882 - Optimize `LESS_USED` worker choice strategy.
886 - Ensure trimmable characters are checked at pool initialization.
887 - Fix message id integer overflow.
888 - Fix pool worker removal in worker choice strategy internals.
890 ## [2.3.10] - 2023-03-18
894 - Fix package.json `exports` syntax for ESM and CommonJS.
898 - Permit SemVer pre-release publication.
900 ## [2.3.10-2] - 2023-03-18
904 - Fix package.json `exports` syntax for ESM and CommonJS.
906 ## [2.3.10-1] - 2023-03-18
910 - Permit SemVer pre-release publication.
912 ## [2.3.10-0] - 2023-03-18
916 - Fix package.json `exports` syntax for ESM and CommonJS.
918 ## [2.3.9] - 2023-03-18
922 - Introduce ESM module support along with CommonJS one.
926 - Fix brown paper bag bug referencing the same object literal.
928 ## [2.3.8] - 2023-03-18
932 - Switch internal benchmarking code to benny.
933 - Switch to TypeScript 5.x.x.
934 - Switch rollup bundler plugins to core ones.
935 - Switch to TSDoc syntax.
936 - Enforce conventional commits.
940 - Fix random integer generator.
941 - Fix worker choice strategy pool type identification at initialization.
943 ## [2.3.7] - 2022-10-23
947 - Switch to open collective FOSS project funding platform.
948 - Switch to ts-standard linter configuration on TypeScript code.
952 - Fixed missing async on pool execute method.
953 - Fixed typing in TypeScript example.
954 - Fixed types in unit tests.
956 ## [2.3.6] - 2022-10-22
960 - Cleanup pool attributes and methods.
961 - Refine error types thrown.
965 - Fix continuous integration build on windows.
966 - Fix code coverage reporting by using c8 instead of nyc.
968 ## [2.3.5] - 2022-10-21
972 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
973 - Optimize tasks usage lookup implementation.
977 - Fix missed pool event emitter type export.
978 - Fix typedoc documentation generation.
980 ## [2.3.4] - 2022-10-17
984 - Fully automate release process with release-it.
988 - Optimize fair share task scheduling algorithm implementation.
989 - Update benchmark versus external pools results with latest version.
991 ## [2.3.3] - 2022-10-15
995 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
997 ## [2.3.2] - 2022-10-14
1001 - Optimize fair share worker selection strategy implementation.
1005 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
1007 ## [2.3.1] - 2022-10-13
1011 - Pool worker choice strategies:
1012 - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
1013 - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
1015 ## [2.2.2] - 2022-10-09
1019 - Fixed `README.md` file.
1021 ## [2.2.1] - 2022-10-08
1025 - Dynamic worker choice strategy change at runtime.
1027 ## [2.2.0] - 2022-01-05
1029 ### Breaking Changes
1031 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
1033 ## [2.1.0] - 2021-08-29
1037 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
1039 ### Breaking Changes
1041 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
1042 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
1043 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
1044 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
1046 ## [2.0.2] - 2021-05-12
1050 - Fix `busy` event emission on fixed pool type
1052 ## [2.0.1] - 2021-03-16
1056 - Check if pool options are properly set.
1057 - `busy` event is emitted on all pool types.
1059 ## [2.0.0] - 2021-03-01
1063 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1065 ### Breaking Changes
1067 - `FullPool` event is now renamed to `busy`.
1068 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1069 _Find more details on our JSDoc._
1071 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1073 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1075 ### Pool options types declaration merge
1077 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1079 #### New `export` strategy
1083 const DynamicThreadPool = require('poolifier/lib/dynamic')
1085 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1088 But you should always prefer just using
1091 const { DynamicThreadPool } = require('poolifier')
1094 #### New type definitions for input data and response
1096 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1097 _This is not a limitation by poolifier but Node.js._
1099 #### Public property replacements
1101 `numWorkers` property is now `numberOfWorkers`
1103 #### Internal (protected) properties and methods renaming
1105 These properties are not intended for end users
1107 - `id` => `nextMessageId`
1109 These methods are not intended for end users
1111 - `_chooseWorker` => `chooseWorker`
1112 - `_newWorker` => `createWorker`
1113 - `_execute` => `internalExecute`
1114 - `_chooseWorker` => `chooseWorker`
1115 - `_checkAlive` => `checkAlive`
1117 - `_runAsync` => `runAsync`
1119 ## [1.1.0] - 2020-05-21
1123 - ThreadWorker support async functions as option
1124 - Various external library patches
1126 ## [1.0.0] - 2020-01-24
1130 - FixedThreadPool implementation
1131 - DynamicThreadPool implementation
1132 - WorkerThread implementation to improve developer experience