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 ## [3.0.14] - 2023-12-13
14 - Fix possible null exception with worker_threads pools.
16 ## [3.0.13] - 2023-12-12
20 - Ensure worker choice strategy wait for worker nodes readiness.
24 - Remove infinite retries support in worker choice strategy to avoid configuration leading to possible infinite recursion or loop.
26 ## [3.0.12] - 2023-12-12
30 - Add infinite retries support in worker choice strategy.
32 ## [3.0.11] - 2023-12-11
36 - Ensure pool asynchronous resource properly track tasks execution.
38 ## [3.0.10] - 2023-12-08
42 - Add a fastpath when tasks stealing or redistribution is impossible.
44 ## [3.0.9] - 2023-11-26
48 - Remove all pool events listener at pool destroying.
49 - Remove all worker node events listener at worker node destroying.
50 - Fix worker node event emitter listeners handling memory leak at pool options runtime change.
52 ## [3.0.8] - 2023-11-25
56 - Ensure continuous tasks stealing on idle start at worker node idling.
58 ## [3.0.7] - 2023-11-24
62 - Make continuous tasks stealing start at worker node idling.
64 ## [3.0.6] - 2023-11-24
68 - Ensure pool statuses are checked at initialization, `start()` or `destroy()`.
69 - Ensure pool `ready` event can be emitted after several `start()/destroy()` cycles.
71 ## [3.0.5] - 2023-10-27
75 - Ensure pool `ready` event can be emitted only once.
77 ## [3.0.4] - 2023-10-20
81 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
82 - Use builtin retry mechanism in worker choice strategies instead of custom one.
84 ## [3.0.3] - 2023-10-19
88 - Avoid null exception at sending message to worker.
89 - Avoid null exception at checking worker node readiness.
91 ## [3.0.2] - 2023-10-17
95 - 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).
97 ## [3.0.1] - 2023-10-16
101 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
105 - Switch the worker node eventing code to `EventTarget` API.
107 ## [3.0.0] - 2023-10-08
111 - Remove Node.js 16.x.x (EOL) support.
113 ## [2.7.5] - 2023-10-03
117 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
119 ## [2.7.4] - 2023-09-25
123 - Fix source maps (bundler issue).
125 ## [2.7.3] - 2023-09-24
129 - Convert pool event emitter to event emitter async resource.
131 ## [2.7.2] - 2023-09-23
135 - Add source maps to npm package to ease debugging.
139 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
141 ## [2.7.1] - 2023-09-20
145 - Ensure worker message listener used one time are removed after usage.
147 ## [2.7.0] - 2023-09-19
151 - Fix task stealing related tasks queue options handling at runtime.
155 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
159 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
160 - Stricter worker constructor arguments validation.
162 ## [2.6.45] - 2023-09-17
166 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
170 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
171 - Add `start()` method to pool API to start the minimum number of workers.
172 - 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.
173 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
175 ## [2.6.44] - 2023-09-08
179 - Use a dedicated PAT to publish on GitHub packages registry.
183 - Publish on GitHub packages registry on release.
187 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
189 ## [2.6.43] - 2023-09-08
193 - Publish on GitHub packages registry on release.
197 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
199 ## [2.6.42] - 2023-09-06
203 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
205 ## [2.6.41] - 2023-09-03
209 - Optimize worker choice strategies implementation.
211 ## [2.6.40] - 2023-09-01
215 - Do not pre-choose in WRR worker choice strategy to avoid bias.
216 - Avoid array out of bound in worker choice strategies after worker node removal.
218 ## [2.6.39] - 2023-08-30
222 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
224 ## [2.6.38] - 2023-08-30
228 - Bundle typescript types declaration into one file.
232 - Improve interleaved weighted round robin worker choice strategy implementation.
234 ## [2.6.37] - 2023-08-28
238 - Ensure unused worker usage statistics are deleted at runtime.
242 - Rename worker choice strategy options `choiceRetries` to `retries`.
243 - Avoid unnecessary branching in worker choice strategies.
245 ## [2.6.36] - 2023-08-27
249 - Fix pool `execute()` arguments check.
253 - Make continuous tasks stealing algorithm less aggressive.
254 - Fine tune tasks stealing algorithm under back pressure.
256 ## [2.6.35] - 2023-08-25
260 - Don't account worker usage statistics for tasks that have failed.
261 - Fix pool information runtime and wait time median computation.
265 - Update simple moving average implementation to use a circular buffer.
266 - Update simple moving median implementation to use a circular buffer.
267 - Account for stolen tasks in worker usage statistics and pool information.
271 - Continuous tasks stealing algorithm.
273 ## [2.6.34] - 2023-08-24
277 - Avoid cascading tasks stealing under back pressure.
281 - Add fastpath to queued tasks rescheduling.
283 ## [2.6.33] - 2023-08-24
287 - Fix queued tasks rescheduling.
291 - Rename tasks queue options `queueMaxSize` to `size`.
295 - Task stealing scheduling algorithm if tasks queueing is enabled.
297 ## [2.6.32] - 2023-08-23
301 - Ensure no task can be executed when the pool is destroyed.
305 - Add `queueMaxSize` option to tasks queue options.
306 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
307 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
309 ## [2.6.31] - 2023-08-20
313 - Fix worker choice strategy retries mechanism in some edge cases.
317 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
318 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
320 ## [2.6.30] - 2023-08-19
324 - Ensure pool event `backPressure` is emitted.
325 - Ensure pool event `full` is emitted only once.
326 - Ensure worker node cannot be instantiated without proper arguments.
328 ## [2.6.29] - 2023-08-18
332 - Fix race condition between readiness and task functions worker message handling at startup.
333 - Fix duplicate task function worker usage statistics computation per task function.
334 - Update task function worker usage statistics if and only if there's at least two different task functions.
335 - Fix race condition at task function worker usage executing task computation leading to negative value.
339 - 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).
340 - Use back pressure detection in worker choice strategies.
341 - Add worker choice strategies retries mechanism if no worker is eligible.
343 ## [2.6.28] - 2023-08-16
347 - Ensure pool workers are properly initialized.
351 - HTTP server pool examples: express-cluster, express-hybrid.
355 - Remove now useless branching in worker hot code path.
357 ## [2.6.27] - 2023-08-15
361 - Add `KillHandler` type definition to exported types.
365 - Add `destroy` event to pool API.
367 ## [2.6.26] - 2023-08-15
371 - Add kill handler to worker options allowing to execute custom code when worker is killed.
372 - Add `listTaskFunctions()` method to pool API.
373 - SMTP client pool example: nodemailer.
375 ## [2.6.25] - 2023-08-13
379 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
380 - WebSocket server pool examples: ws-cluster, ws-hybrid.
382 ## [2.6.24] - 2023-08-12
386 - Add array of transferable objects to the `execute()` method arguments.
387 - WebSocket server pool examples: ws-worker_threads.
389 ## [2.6.23] - 2023-08-11
393 - 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.
397 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
398 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
400 ## [2.6.22] - 2023-08-10
404 - Add missing `types` field to package.json `exports`.
408 - Structure markdown documentation (PR #811).
410 ## [2.6.21] - 2023-08-03
414 - Improve code documentation.
415 - Code refactoring and cleanup for better maintainability and readability.
417 ## [2.6.20] - 2023-07-21
421 - Fix queued tasks redistribution on error task execution starvation.
422 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
426 - Drastically reduce lookups by worker in the worker nodes.
428 ## [2.6.19] - 2023-07-20
432 - Dedicated internal communication channel for worker_threads pools.
434 ## [2.6.18] - 2023-07-19
438 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
440 ## [2.6.17] - 2023-07-16
444 - Add `listTaskFunctions()` method to worker API.
446 ## [2.6.16] - 2023-07-12
450 - Fix pool startup detection.
451 - Fix worker task functions handling.
453 ## [2.6.15] - 2023-07-11
457 - Take into account worker node readiness in worker choice strategies.
459 ## [2.6.14] - 2023-07-10
463 - Fix task function statistics tracking.
465 ## [2.6.13] - 2023-07-10
469 - Add per task function statistics tracking.
470 - Add public methods to manipulate the worker task functions at runtime.
472 ## [2.6.12] - 2023-07-09
476 - Workaround import issue with `node:os` module in node 16.x.x.
478 ## [2.6.11] - 2023-07-09
482 - Fix pool readiness semantic.
484 ## [2.6.10] - 2023-07-08
488 - Ensure workers are not recreated on error at pool startup.
492 - Add `ready` and `strategy` fields to pool information.
493 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
494 - Add dynamic pool sizing checks.
496 ## [2.6.9] - 2023-07-07
500 - Recreate the right worker type on uncaught exception.
504 - Add minimum and maximum to internal measurement statistics.
505 - Add `runTime` and `waitTime` to pool information.
506 - Check worker inactive time only on dynamic worker.
508 ## [2.6.8] - 2023-07-03
512 - Brown paper bag release to fix version handling in pool information.
514 ## [2.6.7] - 2023-07-03
518 - Ensure worker queued tasks at error are reassigned to other pool workers.
522 - Add pool `utilization` ratio to pool information.
523 - Add `version` to pool information.
524 - Add worker information to worker nodes.
526 ## [2.6.6] - 2023-07-01
530 - Add safe helper `availableParallelism()` to help sizing the pool.
534 - Ensure message handler is only registered in worker.
536 ## [2.6.5] - 2023-06-27
540 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
544 - Artificial version bump to 2.6.5 to workaround publication issue.
545 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
546 - Ensure pool event is emitted before task error promise rejection.
547 - Fix queued tasks count computation.
551 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
553 ## [2.6.4] - 2023-06-27
557 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
561 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
562 - Ensure pool event is emitted before task error promise rejection.
563 - Fix queued tasks count computation.
567 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
569 ## [2.6.3] - 2023-06-19
573 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
574 - Update strategies internals after statistics computation.
578 - Optimize O(1) queue implementation.
580 ## [2.6.2] - 2023-06-12
584 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
586 ## [2.6.1] - 2023-06-10
590 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
594 - Fix average statistics computation: ensure failed tasks are not accounted.
596 ## [2.6.0] - 2023-06-09
600 - Add `LEAST_ELU` worker choice strategy (experimental).
601 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
605 - Refactor pool worker node usage internals.
606 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
607 - Breaking change: pool information `info` property object fields have been renamed.
611 - Fix wait time accounting.
612 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
613 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
615 ## [2.5.4] - 2023-06-07
619 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
623 - Compute statistics at the worker level only if needed.
624 - Add `worker_threads` options to thread pool options.
628 - Make the `LEAST_BUSY` strategy only relies on task runtime.
630 ## [2.5.3] - 2023-06-04
634 - Refine pool information content.
635 - Limit pool internals public exposure.
637 ## [2.5.2] - 2023-06-02
641 - Add `taskError` pool event for task execution error.
642 - Add pool information `info` property to pool.
643 - Emit pool information on `busy` and `full` pool events.
645 ## [2.5.1] - 2023-06-01
649 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
650 - Add `error` pool event for uncaught worker error.
652 ## [2.5.0] - 2023-05-31
656 - Switch pool event emitter to `EventEmitterAsyncResource`.
657 - Add tasks wait time accounting in per worker tasks usage.
658 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
662 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
664 ## [2.4.14] - 2023-05-09
668 - Ensure no undefined task runtime can land in the tasks history.
669 - Fix median computation implementation once again.
673 - Unit tests for median and queue implementations.
675 ## [2.4.13] - 2023-05-08
679 - Fix worker choice strategy options validation.
680 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
682 ## [2.4.12] - 2023-05-06
686 - Support multiple task functions per worker.
687 - Add custom worker weights support to worker choice strategies options.
691 - Use O(1) queue implementation for tasks queueing.
695 - Fix median computation implementation.
696 - Fix fair share worker choice strategy internals update.
698 ## [2.4.11] - 2023-04-23
702 - Optimize free worker finding in worker choice strategies.
704 ## [2.4.10] - 2023-04-15
708 - Fix typescript type definition for task function: ensure the input data is optional.
709 - Fix typescript type definition for pool execute(): ensure the input data is optional.
711 ## [2.4.9] - 2023-04-15
715 - Add tasks queue enablement runtime setter to pool.
716 - Add tasks queue options runtime setter to pool.
717 - Add worker choice strategy options runtime setter to pool.
721 - Remove the tasks queuing experimental status.
725 - Fix task function type definition and validation.
726 - Fix worker choice strategy options handling.
728 ## [2.4.8] - 2023-04-12
732 - Fix message between main worker and worker type definition for tasks.
733 - Fix code documentation.
735 ## [2.4.7] - 2023-04-11
739 - Add worker tasks queue options to pool options.
743 - Fix missing documentation.
745 ## [2.4.6] - 2023-04-10
749 - Ensure one task at a time is executed per worker with tasks queueing enabled.
750 - Properly count worker executing tasks with tasks queueing enabled.
752 ## [2.4.5] - 2023-04-09
756 - Use monotonic high resolution timer for worker tasks runtime.
757 - Add worker tasks median runtime to statistics.
758 - Add worker tasks queue (experimental).
760 ## [2.4.4] - 2023-04-07
764 - Add `PoolEvents` enumeration and `PoolEvent` type.
768 - Destroy worker only on alive check.
770 ## [2.4.3] - 2023-04-07
774 - Fix typedoc generation with inheritance.
776 ## [2.4.2] - 2023-04-06
780 - Add `full` event to dynamic pool.
781 - Keep worker choice strategy in memory for conditional reuse.
785 - Fix possible negative worker key at worker removal in worker choice strategies.
787 ## [2.4.1] - 2023-04-05
791 - Optimize worker choice strategy for dynamic pool.
795 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
797 ## [2.4.0] - 2023-04-04
801 - Add `LESS_BUSY` worker choice strategy.
805 - Optimize worker storage in pool.
806 - Optimize worker alive status check.
807 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
808 - Optimize `LESS_USED` worker choice strategy.
809 - Update benchmark versus external threads pools.
810 - Optimize tasks usage statistics requirements for worker choice strategy.
814 - Ensure trimmable characters are checked at pool initialization.
815 - Fix message id integer overflow.
816 - Fix pool worker removal in worker choice strategy internals.
817 - Fix package publication with pnpm.
819 ## [2.4.0-3] - 2023-04-04
823 - Add `LESS_BUSY` worker choice strategy.
827 - Optimize worker storage in pool.
828 - Optimize worker alive status check.
829 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
830 - Optimize `LESS_USED` worker choice strategy.
831 - Update benchmark versus external threads pools.
835 - Ensure trimmable characters are checked at pool initialization.
836 - Fix message id integer overflow.
837 - Fix pool worker removal in worker choice strategy internals.
838 - Fix package publication with pnpm.
840 ## [2.4.0-2] - 2023-04-03
844 - Add `LESS_BUSY` worker choice strategy.
848 - Optimize worker storage in pool.
849 - Optimize worker alive status check.
850 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
851 - Optimize `LESS_USED` worker choice strategy.
855 - Ensure trimmable characters are checked at pool initialization.
856 - Fix message id integer overflow.
857 - Fix pool worker removal in worker choice strategy internals.
858 - Fix package publication with pnpm.
860 ## [2.4.0-1] - 2023-04-03
864 - Add `LESS_BUSY` worker choice strategy.
868 - Optimize worker storage in pool.
869 - Optimize worker alive status check.
870 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
871 - Optimize `LESS_USED` worker choice strategy.
875 - Ensure trimmable characters are checked at pool initialization.
876 - Fix message id integer overflow.
877 - Fix pool worker removal in worker choice strategy internals.
879 ## [2.4.0-0] - 2023-04-03
883 - Add `LESS_BUSY` worker choice strategy.
887 - Optimize worker storage in pool.
888 - Optimize worker alive status check.
889 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
890 - Optimize `LESS_USED` worker choice strategy.
894 - Ensure trimmable characters are checked at pool initialization.
895 - Fix message id integer overflow.
896 - Fix pool worker removal in worker choice strategy internals.
898 ## [2.3.10] - 2023-03-18
902 - Fix package.json `exports` syntax for ESM and CommonJS.
906 - Permit SemVer pre-release publication.
908 ## [2.3.10-2] - 2023-03-18
912 - Fix package.json `exports` syntax for ESM and CommonJS.
914 ## [2.3.10-1] - 2023-03-18
918 - Permit SemVer pre-release publication.
920 ## [2.3.10-0] - 2023-03-18
924 - Fix package.json `exports` syntax for ESM and CommonJS.
926 ## [2.3.9] - 2023-03-18
930 - Introduce ESM module support along with CommonJS one.
934 - Fix brown paper bag bug referencing the same object literal.
936 ## [2.3.8] - 2023-03-18
940 - Switch internal benchmarking code to benny.
941 - Switch to TypeScript 5.x.x.
942 - Switch rollup bundler plugins to core ones.
943 - Switch to TSDoc syntax.
944 - Enforce conventional commits.
948 - Fix random integer generator.
949 - Fix worker choice strategy pool type identification at initialization.
951 ## [2.3.7] - 2022-10-23
955 - Switch to open collective FOSS project funding platform.
956 - Switch to ts-standard linter configuration on TypeScript code.
960 - Fixed missing async on pool execute method.
961 - Fixed typing in TypeScript example.
962 - Fixed types in unit tests.
964 ## [2.3.6] - 2022-10-22
968 - Cleanup pool attributes and methods.
969 - Refine error types thrown.
973 - Fix continuous integration build on windows.
974 - Fix code coverage reporting by using c8 instead of nyc.
976 ## [2.3.5] - 2022-10-21
980 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
981 - Optimize tasks usage lookup implementation.
985 - Fix missed pool event emitter type export.
986 - Fix typedoc documentation generation.
988 ## [2.3.4] - 2022-10-17
992 - Fully automate release process with release-it.
996 - Optimize fair share task scheduling algorithm implementation.
997 - Update benchmark versus external pools results with latest version.
999 ## [2.3.3] - 2022-10-15
1003 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
1005 ## [2.3.2] - 2022-10-14
1009 - Optimize fair share worker selection strategy implementation.
1013 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
1015 ## [2.3.1] - 2022-10-13
1019 - Pool worker choice strategies:
1020 - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
1021 - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
1023 ## [2.2.2] - 2022-10-09
1027 - Fixed `README.md` file.
1029 ## [2.2.1] - 2022-10-08
1033 - Dynamic worker choice strategy change at runtime.
1035 ## [2.2.0] - 2022-01-05
1037 ### Breaking Changes
1039 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
1041 ## [2.1.0] - 2021-08-29
1045 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
1047 ### Breaking Changes
1049 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
1050 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
1051 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
1052 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
1054 ## [2.0.2] - 2021-05-12
1058 - Fix `busy` event emission on fixed pool type
1060 ## [2.0.1] - 2021-03-16
1064 - Check if pool options are properly set.
1065 - `busy` event is emitted on all pool types.
1067 ## [2.0.0] - 2021-03-01
1071 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1073 ### Breaking Changes
1075 - `FullPool` event is now renamed to `busy`.
1076 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1077 _Find more details on our JSDoc._
1079 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1081 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1083 ### Pool options types declaration merge
1085 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1087 #### New `export` strategy
1091 const DynamicThreadPool = require('poolifier/lib/dynamic')
1093 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1096 But you should always prefer just using
1099 const { DynamicThreadPool } = require('poolifier')
1102 #### New type definitions for input data and response
1104 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1105 _This is not a limitation by poolifier but Node.js._
1107 #### Public property replacements
1109 `numWorkers` property is now `numberOfWorkers`
1111 #### Internal (protected) properties and methods renaming
1113 These properties are not intended for end users
1115 - `id` => `nextMessageId`
1117 These methods are not intended for end users
1119 - `_chooseWorker` => `chooseWorker`
1120 - `_newWorker` => `createWorker`
1121 - `_execute` => `internalExecute`
1122 - `_chooseWorker` => `chooseWorker`
1123 - `_checkAlive` => `checkAlive`
1125 - `_runAsync` => `runAsync`
1127 ## [1.1.0] - 2020-05-21
1131 - ThreadWorker support async functions as option
1132 - Various external library patches
1134 ## [1.0.0] - 2020-01-24
1138 - FixedThreadPool implementation
1139 - DynamicThreadPool implementation
1140 - WorkerThread implementation to improve developer experience