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 - TypeScript breaking change: merge ThreadPoolOptions and ClusterPoolOptions types into PoolOptions type.
14 ## [3.0.14] - 2023-12-13
18 - Fix possible null exception with worker_threads pools.
20 ## [3.0.13] - 2023-12-12
24 - Ensure worker choice strategy wait for worker nodes readiness.
28 - Remove infinite retries support in worker choice strategy to avoid configuration leading to possible infinite recursion or loop.
30 ## [3.0.12] - 2023-12-12
34 - Add infinite retries support in worker choice strategy.
36 ## [3.0.11] - 2023-12-11
40 - Ensure pool asynchronous resource properly track tasks execution.
42 ## [3.0.10] - 2023-12-08
46 - Add a fastpath when tasks stealing or redistribution is impossible.
48 ## [3.0.9] - 2023-11-26
52 - Remove all pool events listener at pool destroying.
53 - Remove all worker node events listener at worker node destroying.
54 - Fix worker node event emitter listeners handling memory leak at pool options runtime change.
56 ## [3.0.8] - 2023-11-25
60 - Ensure continuous tasks stealing on idle start at worker node idling.
62 ## [3.0.7] - 2023-11-24
66 - Make continuous tasks stealing start at worker node idling.
68 ## [3.0.6] - 2023-11-24
72 - Ensure pool statuses are checked at initialization, `start()` or `destroy()`.
73 - Ensure pool `ready` event can be emitted after several `start()/destroy()` cycles.
75 ## [3.0.5] - 2023-10-27
79 - Ensure pool `ready` event can be emitted only once.
81 ## [3.0.4] - 2023-10-20
85 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
86 - Use builtin retry mechanism in worker choice strategies instead of custom one.
88 ## [3.0.3] - 2023-10-19
92 - Avoid null exception at sending message to worker.
93 - Avoid null exception at checking worker node readiness.
95 ## [3.0.2] - 2023-10-17
99 - 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).
101 ## [3.0.1] - 2023-10-16
105 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
109 - Switch the worker node eventing code to `EventTarget` API.
111 ## [3.0.0] - 2023-10-08
115 - Remove Node.js 16.x.x (EOL) support.
117 ## [2.7.5] - 2023-10-03
121 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
123 ## [2.7.4] - 2023-09-25
127 - Fix source maps (bundler issue).
129 ## [2.7.3] - 2023-09-24
133 - Convert pool event emitter to event emitter async resource.
135 ## [2.7.2] - 2023-09-23
139 - Add source maps to npm package to ease debugging.
143 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
145 ## [2.7.1] - 2023-09-20
149 - Ensure worker message listener used one time are removed after usage.
151 ## [2.7.0] - 2023-09-19
155 - Fix task stealing related tasks queue options handling at runtime.
159 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
163 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
164 - Stricter worker constructor arguments validation.
166 ## [2.6.45] - 2023-09-17
170 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
174 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
175 - Add `start()` method to pool API to start the minimum number of workers.
176 - 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.
177 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
179 ## [2.6.44] - 2023-09-08
183 - Use a dedicated PAT to publish on GitHub packages registry.
187 - Publish on GitHub packages registry on release.
191 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
193 ## [2.6.43] - 2023-09-08
197 - Publish on GitHub packages registry on release.
201 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
203 ## [2.6.42] - 2023-09-06
207 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
209 ## [2.6.41] - 2023-09-03
213 - Optimize worker choice strategies implementation.
215 ## [2.6.40] - 2023-09-01
219 - Do not pre-choose in WRR worker choice strategy to avoid bias.
220 - Avoid array out of bound in worker choice strategies after worker node removal.
222 ## [2.6.39] - 2023-08-30
226 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
228 ## [2.6.38] - 2023-08-30
232 - Bundle typescript types declaration into one file.
236 - Improve interleaved weighted round robin worker choice strategy implementation.
238 ## [2.6.37] - 2023-08-28
242 - Ensure unused worker usage statistics are deleted at runtime.
246 - Rename worker choice strategy options `choiceRetries` to `retries`.
247 - Avoid unnecessary branching in worker choice strategies.
249 ## [2.6.36] - 2023-08-27
253 - Fix pool `execute()` arguments check.
257 - Make continuous tasks stealing algorithm less aggressive.
258 - Fine tune tasks stealing algorithm under back pressure.
260 ## [2.6.35] - 2023-08-25
264 - Don't account worker usage statistics for tasks that have failed.
265 - Fix pool information runtime and wait time median computation.
269 - Update simple moving average implementation to use a circular buffer.
270 - Update simple moving median implementation to use a circular buffer.
271 - Account for stolen tasks in worker usage statistics and pool information.
275 - Continuous tasks stealing algorithm.
277 ## [2.6.34] - 2023-08-24
281 - Avoid cascading tasks stealing under back pressure.
285 - Add fastpath to queued tasks rescheduling.
287 ## [2.6.33] - 2023-08-24
291 - Fix queued tasks rescheduling.
295 - Rename tasks queue options `queueMaxSize` to `size`.
299 - Task stealing scheduling algorithm if tasks queueing is enabled.
301 ## [2.6.32] - 2023-08-23
305 - Ensure no task can be executed when the pool is destroyed.
309 - Add `queueMaxSize` option to tasks queue options.
310 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
311 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
313 ## [2.6.31] - 2023-08-20
317 - Fix worker choice strategy retries mechanism in some edge cases.
321 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
322 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
324 ## [2.6.30] - 2023-08-19
328 - Ensure pool event `backPressure` is emitted.
329 - Ensure pool event `full` is emitted only once.
330 - Ensure worker node cannot be instantiated without proper arguments.
332 ## [2.6.29] - 2023-08-18
336 - Fix race condition between readiness and task functions worker message handling at startup.
337 - Fix duplicate task function worker usage statistics computation per task function.
338 - Update task function worker usage statistics if and only if there's at least two different task functions.
339 - Fix race condition at task function worker usage executing task computation leading to negative value.
343 - 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).
344 - Use back pressure detection in worker choice strategies.
345 - Add worker choice strategies retries mechanism if no worker is eligible.
347 ## [2.6.28] - 2023-08-16
351 - Ensure pool workers are properly initialized.
355 - HTTP server pool examples: express-cluster, express-hybrid.
359 - Remove now useless branching in worker hot code path.
361 ## [2.6.27] - 2023-08-15
365 - Add `KillHandler` type definition to exported types.
369 - Add `destroy` event to pool API.
371 ## [2.6.26] - 2023-08-15
375 - Add kill handler to worker options allowing to execute custom code when worker is killed.
376 - Add `listTaskFunctions()` method to pool API.
377 - SMTP client pool example: nodemailer.
379 ## [2.6.25] - 2023-08-13
383 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
384 - WebSocket server pool examples: ws-cluster, ws-hybrid.
386 ## [2.6.24] - 2023-08-12
390 - Add array of transferable objects to the `execute()` method arguments.
391 - WebSocket server pool examples: ws-worker_threads.
393 ## [2.6.23] - 2023-08-11
397 - 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.
401 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
402 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
404 ## [2.6.22] - 2023-08-10
408 - Add missing `types` field to package.json `exports`.
412 - Structure markdown documentation (PR #811).
414 ## [2.6.21] - 2023-08-03
418 - Improve code documentation.
419 - Code refactoring and cleanup for better maintainability and readability.
421 ## [2.6.20] - 2023-07-21
425 - Fix queued tasks redistribution on error task execution starvation.
426 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
430 - Drastically reduce lookups by worker in the worker nodes.
432 ## [2.6.19] - 2023-07-20
436 - Dedicated internal communication channel for worker_threads pools.
438 ## [2.6.18] - 2023-07-19
442 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
444 ## [2.6.17] - 2023-07-16
448 - Add `listTaskFunctions()` method to worker API.
450 ## [2.6.16] - 2023-07-12
454 - Fix pool startup detection.
455 - Fix worker task functions handling.
457 ## [2.6.15] - 2023-07-11
461 - Take into account worker node readiness in worker choice strategies.
463 ## [2.6.14] - 2023-07-10
467 - Fix task function statistics tracking.
469 ## [2.6.13] - 2023-07-10
473 - Add per task function statistics tracking.
474 - Add public methods to manipulate the worker task functions at runtime.
476 ## [2.6.12] - 2023-07-09
480 - Workaround import issue with `node:os` module in node 16.x.x.
482 ## [2.6.11] - 2023-07-09
486 - Fix pool readiness semantic.
488 ## [2.6.10] - 2023-07-08
492 - Ensure workers are not recreated on error at pool startup.
496 - Add `ready` and `strategy` fields to pool information.
497 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
498 - Add dynamic pool sizing checks.
500 ## [2.6.9] - 2023-07-07
504 - Recreate the right worker type on uncaught exception.
508 - Add minimum and maximum to internal measurement statistics.
509 - Add `runTime` and `waitTime` to pool information.
510 - Check worker inactive time only on dynamic worker.
512 ## [2.6.8] - 2023-07-03
516 - Brown paper bag release to fix version handling in pool information.
518 ## [2.6.7] - 2023-07-03
522 - Ensure worker queued tasks at error are reassigned to other pool workers.
526 - Add pool `utilization` ratio to pool information.
527 - Add `version` to pool information.
528 - Add worker information to worker nodes.
530 ## [2.6.6] - 2023-07-01
534 - Add safe helper `availableParallelism()` to help sizing the pool.
538 - Ensure message handler is only registered in worker.
540 ## [2.6.5] - 2023-06-27
544 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
548 - Artificial version bump to 2.6.5 to workaround publication issue.
549 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
550 - Ensure pool event is emitted before task error promise rejection.
551 - Fix queued tasks count computation.
555 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
557 ## [2.6.4] - 2023-06-27
561 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
565 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
566 - Ensure pool event is emitted before task error promise rejection.
567 - Fix queued tasks count computation.
571 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
573 ## [2.6.3] - 2023-06-19
577 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
578 - Update strategies internals after statistics computation.
582 - Optimize O(1) queue implementation.
584 ## [2.6.2] - 2023-06-12
588 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
590 ## [2.6.1] - 2023-06-10
594 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
598 - Fix average statistics computation: ensure failed tasks are not accounted.
600 ## [2.6.0] - 2023-06-09
604 - Add `LEAST_ELU` worker choice strategy (experimental).
605 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
609 - Refactor pool worker node usage internals.
610 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
611 - Breaking change: pool information `info` property object fields have been renamed.
615 - Fix wait time accounting.
616 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
617 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
619 ## [2.5.4] - 2023-06-07
623 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
627 - Compute statistics at the worker level only if needed.
628 - Add `worker_threads` options to thread pool options.
632 - Make the `LEAST_BUSY` strategy only relies on task runtime.
634 ## [2.5.3] - 2023-06-04
638 - Refine pool information content.
639 - Limit pool internals public exposure.
641 ## [2.5.2] - 2023-06-02
645 - Add `taskError` pool event for task execution error.
646 - Add pool information `info` property to pool.
647 - Emit pool information on `busy` and `full` pool events.
649 ## [2.5.1] - 2023-06-01
653 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
654 - Add `error` pool event for uncaught worker error.
656 ## [2.5.0] - 2023-05-31
660 - Switch pool event emitter to `EventEmitterAsyncResource`.
661 - Add tasks wait time accounting in per worker tasks usage.
662 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
666 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
668 ## [2.4.14] - 2023-05-09
672 - Ensure no undefined task runtime can land in the tasks history.
673 - Fix median computation implementation once again.
677 - Unit tests for median and queue implementations.
679 ## [2.4.13] - 2023-05-08
683 - Fix worker choice strategy options validation.
684 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
686 ## [2.4.12] - 2023-05-06
690 - Support multiple task functions per worker.
691 - Add custom worker weights support to worker choice strategies options.
695 - Use O(1) queue implementation for tasks queueing.
699 - Fix median computation implementation.
700 - Fix fair share worker choice strategy internals update.
702 ## [2.4.11] - 2023-04-23
706 - Optimize free worker finding in worker choice strategies.
708 ## [2.4.10] - 2023-04-15
712 - Fix typescript type definition for task function: ensure the input data is optional.
713 - Fix typescript type definition for pool execute(): ensure the input data is optional.
715 ## [2.4.9] - 2023-04-15
719 - Add tasks queue enablement runtime setter to pool.
720 - Add tasks queue options runtime setter to pool.
721 - Add worker choice strategy options runtime setter to pool.
725 - Remove the tasks queuing experimental status.
729 - Fix task function type definition and validation.
730 - Fix worker choice strategy options handling.
732 ## [2.4.8] - 2023-04-12
736 - Fix message between main worker and worker type definition for tasks.
737 - Fix code documentation.
739 ## [2.4.7] - 2023-04-11
743 - Add worker tasks queue options to pool options.
747 - Fix missing documentation.
749 ## [2.4.6] - 2023-04-10
753 - Ensure one task at a time is executed per worker with tasks queueing enabled.
754 - Properly count worker executing tasks with tasks queueing enabled.
756 ## [2.4.5] - 2023-04-09
760 - Use monotonic high resolution timer for worker tasks runtime.
761 - Add worker tasks median runtime to statistics.
762 - Add worker tasks queue (experimental).
764 ## [2.4.4] - 2023-04-07
768 - Add `PoolEvents` enumeration and `PoolEvent` type.
772 - Destroy worker only on alive check.
774 ## [2.4.3] - 2023-04-07
778 - Fix typedoc generation with inheritance.
780 ## [2.4.2] - 2023-04-06
784 - Add `full` event to dynamic pool.
785 - Keep worker choice strategy in memory for conditional reuse.
789 - Fix possible negative worker key at worker removal in worker choice strategies.
791 ## [2.4.1] - 2023-04-05
795 - Optimize worker choice strategy for dynamic pool.
799 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
801 ## [2.4.0] - 2023-04-04
805 - Add `LESS_BUSY` worker choice strategy.
809 - Optimize worker storage in pool.
810 - Optimize worker alive status check.
811 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
812 - Optimize `LESS_USED` worker choice strategy.
813 - Update benchmark versus external threads pools.
814 - Optimize tasks usage statistics requirements for worker choice strategy.
818 - Ensure trimmable characters are checked at pool initialization.
819 - Fix message id integer overflow.
820 - Fix pool worker removal in worker choice strategy internals.
821 - Fix package publication with pnpm.
823 ## [2.4.0-3] - 2023-04-04
827 - Add `LESS_BUSY` worker choice strategy.
831 - Optimize worker storage in pool.
832 - Optimize worker alive status check.
833 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
834 - Optimize `LESS_USED` worker choice strategy.
835 - Update benchmark versus external threads pools.
839 - Ensure trimmable characters are checked at pool initialization.
840 - Fix message id integer overflow.
841 - Fix pool worker removal in worker choice strategy internals.
842 - Fix package publication with pnpm.
844 ## [2.4.0-2] - 2023-04-03
848 - Add `LESS_BUSY` worker choice strategy.
852 - Optimize worker storage in pool.
853 - Optimize worker alive status check.
854 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
855 - Optimize `LESS_USED` worker choice strategy.
859 - Ensure trimmable characters are checked at pool initialization.
860 - Fix message id integer overflow.
861 - Fix pool worker removal in worker choice strategy internals.
862 - Fix package publication with pnpm.
864 ## [2.4.0-1] - 2023-04-03
868 - Add `LESS_BUSY` worker choice strategy.
872 - Optimize worker storage in pool.
873 - Optimize worker alive status check.
874 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
875 - Optimize `LESS_USED` worker choice strategy.
879 - Ensure trimmable characters are checked at pool initialization.
880 - Fix message id integer overflow.
881 - Fix pool worker removal in worker choice strategy internals.
883 ## [2.4.0-0] - 2023-04-03
887 - Add `LESS_BUSY` worker choice strategy.
891 - Optimize worker storage in pool.
892 - Optimize worker alive status check.
893 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
894 - Optimize `LESS_USED` worker choice strategy.
898 - Ensure trimmable characters are checked at pool initialization.
899 - Fix message id integer overflow.
900 - Fix pool worker removal in worker choice strategy internals.
902 ## [2.3.10] - 2023-03-18
906 - Fix package.json `exports` syntax for ESM and CommonJS.
910 - Permit SemVer pre-release publication.
912 ## [2.3.10-2] - 2023-03-18
916 - Fix package.json `exports` syntax for ESM and CommonJS.
918 ## [2.3.10-1] - 2023-03-18
922 - Permit SemVer pre-release publication.
924 ## [2.3.10-0] - 2023-03-18
928 - Fix package.json `exports` syntax for ESM and CommonJS.
930 ## [2.3.9] - 2023-03-18
934 - Introduce ESM module support along with CommonJS one.
938 - Fix brown paper bag bug referencing the same object literal.
940 ## [2.3.8] - 2023-03-18
944 - Switch internal benchmarking code to benny.
945 - Switch to TypeScript 5.x.x.
946 - Switch rollup bundler plugins to core ones.
947 - Switch to TSDoc syntax.
948 - Enforce conventional commits.
952 - Fix random integer generator.
953 - Fix worker choice strategy pool type identification at initialization.
955 ## [2.3.7] - 2022-10-23
959 - Switch to open collective FOSS project funding platform.
960 - Switch to ts-standard linter configuration on TypeScript code.
964 - Fixed missing async on pool execute method.
965 - Fixed typing in TypeScript example.
966 - Fixed types in unit tests.
968 ## [2.3.6] - 2022-10-22
972 - Cleanup pool attributes and methods.
973 - Refine error types thrown.
977 - Fix continuous integration build on windows.
978 - Fix code coverage reporting by using c8 instead of nyc.
980 ## [2.3.5] - 2022-10-21
984 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
985 - Optimize tasks usage lookup implementation.
989 - Fix missed pool event emitter type export.
990 - Fix typedoc documentation generation.
992 ## [2.3.4] - 2022-10-17
996 - Fully automate release process with release-it.
1000 - Optimize fair share task scheduling algorithm implementation.
1001 - Update benchmark versus external pools results with latest version.
1003 ## [2.3.3] - 2022-10-15
1007 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
1009 ## [2.3.2] - 2022-10-14
1013 - Optimize fair share worker selection strategy implementation.
1017 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
1019 ## [2.3.1] - 2022-10-13
1023 - Pool worker choice strategies:
1024 - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
1025 - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
1027 ## [2.2.2] - 2022-10-09
1031 - Fixed `README.md` file.
1033 ## [2.2.1] - 2022-10-08
1037 - Dynamic worker choice strategy change at runtime.
1039 ## [2.2.0] - 2022-01-05
1041 ### Breaking Changes
1043 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
1045 ## [2.1.0] - 2021-08-29
1049 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
1051 ### Breaking Changes
1053 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
1054 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
1055 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
1056 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
1058 ## [2.0.2] - 2021-05-12
1062 - Fix `busy` event emission on fixed pool type
1064 ## [2.0.1] - 2021-03-16
1068 - Check if pool options are properly set.
1069 - `busy` event is emitted on all pool types.
1071 ## [2.0.0] - 2021-03-01
1075 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1077 ### Breaking Changes
1079 - `FullPool` event is now renamed to `busy`.
1080 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1081 _Find more details on our JSDoc._
1083 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1085 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1087 ### Pool options types declaration merge
1089 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1091 #### New `export` strategy
1095 const DynamicThreadPool = require('poolifier/lib/dynamic')
1097 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1100 But you should always prefer just using
1103 const { DynamicThreadPool } = require('poolifier')
1106 #### New type definitions for input data and response
1108 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1109 _This is not a limitation by poolifier but Node.js._
1111 #### Public property replacements
1113 `numWorkers` property is now `numberOfWorkers`
1115 #### Internal (protected) properties and methods renaming
1117 These properties are not intended for end users
1119 - `id` => `nextMessageId`
1121 These methods are not intended for end users
1123 - `_chooseWorker` => `chooseWorker`
1124 - `_newWorker` => `createWorker`
1125 - `_execute` => `internalExecute`
1126 - `_chooseWorker` => `chooseWorker`
1127 - `_checkAlive` => `checkAlive`
1129 - `_runAsync` => `runAsync`
1131 ## [1.1.0] - 2020-05-21
1135 - ThreadWorker support async functions as option
1136 - Various external library patches
1138 ## [1.0.0] - 2020-01-24
1142 - FixedThreadPool implementation
1143 - DynamicThreadPool implementation
1144 - WorkerThread implementation to improve developer experience