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 ## [3.1.3] - 2023-12-17
14 - Fix possible null exception at handling task execution response.
16 ## [3.1.2] - 2023-12-17
20 - Wait for queued tasks to end at worker termination.
22 ## [3.1.1] - 2023-12-16
26 - Fix pool options TS type definition.
28 ## [3.1.0] - 2023-12-16
32 - TypeScript breaking change: merge ThreadPoolOptions and ClusterPoolOptions types into PoolOptions type.
34 ## [3.0.14] - 2023-12-13
38 - Fix possible null exception with worker_threads pools.
40 ## [3.0.13] - 2023-12-12
44 - Ensure worker choice strategy wait for worker nodes readiness.
48 - Remove infinite retries support in worker choice strategy to avoid configuration leading to possible infinite recursion or loop.
50 ## [3.0.12] - 2023-12-12
54 - Add infinite retries support in worker choice strategy.
56 ## [3.0.11] - 2023-12-11
60 - Ensure pool asynchronous resource properly track tasks execution.
62 ## [3.0.10] - 2023-12-08
66 - Add a fastpath when tasks stealing or redistribution is impossible.
68 ## [3.0.9] - 2023-11-26
72 - Remove all pool events listener at pool destroying.
73 - Remove all worker node events listener at worker node destroying.
74 - Fix worker node event emitter listeners handling memory leak at pool options runtime change.
76 ## [3.0.8] - 2023-11-25
80 - Ensure continuous tasks stealing on idle start at worker node idling.
82 ## [3.0.7] - 2023-11-24
86 - Make continuous tasks stealing start at worker node idling.
88 ## [3.0.6] - 2023-11-24
92 - Ensure pool statuses are checked at initialization, `start()` or `destroy()`.
93 - Ensure pool `ready` event can be emitted after several `start()/destroy()` cycles.
95 ## [3.0.5] - 2023-10-27
99 - Ensure pool `ready` event can be emitted only once.
101 ## [3.0.4] - 2023-10-20
105 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
106 - Use builtin retry mechanism in worker choice strategies instead of custom one.
108 ## [3.0.3] - 2023-10-19
112 - Avoid null exception at sending message to worker.
113 - Avoid null exception at checking worker node readiness.
115 ## [3.0.2] - 2023-10-17
119 - 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).
121 ## [3.0.1] - 2023-10-16
125 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
129 - Switch the worker node eventing code to `EventTarget` API.
131 ## [3.0.0] - 2023-10-08
135 - Remove Node.js 16.x.x (EOL) support.
137 ## [2.7.5] - 2023-10-03
141 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
143 ## [2.7.4] - 2023-09-25
147 - Fix source maps (bundler issue).
149 ## [2.7.3] - 2023-09-24
153 - Convert pool event emitter to event emitter async resource.
155 ## [2.7.2] - 2023-09-23
159 - Add source maps to npm package to ease debugging.
163 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
165 ## [2.7.1] - 2023-09-20
169 - Ensure worker message listener used one time are removed after usage.
171 ## [2.7.0] - 2023-09-19
175 - Fix task stealing related tasks queue options handling at runtime.
179 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
183 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
184 - Stricter worker constructor arguments validation.
186 ## [2.6.45] - 2023-09-17
190 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
194 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
195 - Add `start()` method to pool API to start the minimum number of workers.
196 - 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.
197 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
199 ## [2.6.44] - 2023-09-08
203 - Use a dedicated PAT to publish on GitHub packages registry.
207 - Publish on GitHub packages registry on release.
211 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
213 ## [2.6.43] - 2023-09-08
217 - Publish on GitHub packages registry on release.
221 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
223 ## [2.6.42] - 2023-09-06
227 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
229 ## [2.6.41] - 2023-09-03
233 - Optimize worker choice strategies implementation.
235 ## [2.6.40] - 2023-09-01
239 - Do not pre-choose in WRR worker choice strategy to avoid bias.
240 - Avoid array out of bound in worker choice strategies after worker node removal.
242 ## [2.6.39] - 2023-08-30
246 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
248 ## [2.6.38] - 2023-08-30
252 - Bundle typescript types declaration into one file.
256 - Improve interleaved weighted round robin worker choice strategy implementation.
258 ## [2.6.37] - 2023-08-28
262 - Ensure unused worker usage statistics are deleted at runtime.
266 - Rename worker choice strategy options `choiceRetries` to `retries`.
267 - Avoid unnecessary branching in worker choice strategies.
269 ## [2.6.36] - 2023-08-27
273 - Fix pool `execute()` arguments check.
277 - Make continuous tasks stealing algorithm less aggressive.
278 - Fine tune tasks stealing algorithm under back pressure.
280 ## [2.6.35] - 2023-08-25
284 - Don't account worker usage statistics for tasks that have failed.
285 - Fix pool information runtime and wait time median computation.
289 - Update simple moving average implementation to use a circular buffer.
290 - Update simple moving median implementation to use a circular buffer.
291 - Account for stolen tasks in worker usage statistics and pool information.
295 - Continuous tasks stealing algorithm.
297 ## [2.6.34] - 2023-08-24
301 - Avoid cascading tasks stealing under back pressure.
305 - Add fastpath to queued tasks rescheduling.
307 ## [2.6.33] - 2023-08-24
311 - Fix queued tasks rescheduling.
315 - Rename tasks queue options `queueMaxSize` to `size`.
319 - Task stealing scheduling algorithm if tasks queueing is enabled.
321 ## [2.6.32] - 2023-08-23
325 - Ensure no task can be executed when the pool is destroyed.
329 - Add `queueMaxSize` option to tasks queue options.
330 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
331 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
333 ## [2.6.31] - 2023-08-20
337 - Fix worker choice strategy retries mechanism in some edge cases.
341 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
342 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
344 ## [2.6.30] - 2023-08-19
348 - Ensure pool event `backPressure` is emitted.
349 - Ensure pool event `full` is emitted only once.
350 - Ensure worker node cannot be instantiated without proper arguments.
352 ## [2.6.29] - 2023-08-18
356 - Fix race condition between readiness and task functions worker message handling at startup.
357 - Fix duplicate task function worker usage statistics computation per task function.
358 - Update task function worker usage statistics if and only if there's at least two different task functions.
359 - Fix race condition at task function worker usage executing task computation leading to negative value.
363 - 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).
364 - Use back pressure detection in worker choice strategies.
365 - Add worker choice strategies retries mechanism if no worker is eligible.
367 ## [2.6.28] - 2023-08-16
371 - Ensure pool workers are properly initialized.
375 - HTTP server pool examples: express-cluster, express-hybrid.
379 - Remove now useless branching in worker hot code path.
381 ## [2.6.27] - 2023-08-15
385 - Add `KillHandler` type definition to exported types.
389 - Add `destroy` event to pool API.
391 ## [2.6.26] - 2023-08-15
395 - Add kill handler to worker options allowing to execute custom code when worker is killed.
396 - Add `listTaskFunctions()` method to pool API.
397 - SMTP client pool example: nodemailer.
399 ## [2.6.25] - 2023-08-13
403 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
404 - WebSocket server pool examples: ws-cluster, ws-hybrid.
406 ## [2.6.24] - 2023-08-12
410 - Add array of transferable objects to the `execute()` method arguments.
411 - WebSocket server pool examples: ws-worker_threads.
413 ## [2.6.23] - 2023-08-11
417 - 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.
421 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
422 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
424 ## [2.6.22] - 2023-08-10
428 - Add missing `types` field to package.json `exports`.
432 - Structure markdown documentation (PR #811).
434 ## [2.6.21] - 2023-08-03
438 - Improve code documentation.
439 - Code refactoring and cleanup for better maintainability and readability.
441 ## [2.6.20] - 2023-07-21
445 - Fix queued tasks redistribution on error task execution starvation.
446 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
450 - Drastically reduce lookups by worker in the worker nodes.
452 ## [2.6.19] - 2023-07-20
456 - Dedicated internal communication channel for worker_threads pools.
458 ## [2.6.18] - 2023-07-19
462 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
464 ## [2.6.17] - 2023-07-16
468 - Add `listTaskFunctions()` method to worker API.
470 ## [2.6.16] - 2023-07-12
474 - Fix pool startup detection.
475 - Fix worker task functions handling.
477 ## [2.6.15] - 2023-07-11
481 - Take into account worker node readiness in worker choice strategies.
483 ## [2.6.14] - 2023-07-10
487 - Fix task function statistics tracking.
489 ## [2.6.13] - 2023-07-10
493 - Add per task function statistics tracking.
494 - Add public methods to manipulate the worker task functions at runtime.
496 ## [2.6.12] - 2023-07-09
500 - Workaround import issue with `node:os` module in node 16.x.x.
502 ## [2.6.11] - 2023-07-09
506 - Fix pool readiness semantic.
508 ## [2.6.10] - 2023-07-08
512 - Ensure workers are not recreated on error at pool startup.
516 - Add `ready` and `strategy` fields to pool information.
517 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
518 - Add dynamic pool sizing checks.
520 ## [2.6.9] - 2023-07-07
524 - Recreate the right worker type on uncaught exception.
528 - Add minimum and maximum to internal measurement statistics.
529 - Add `runTime` and `waitTime` to pool information.
530 - Check worker inactive time only on dynamic worker.
532 ## [2.6.8] - 2023-07-03
536 - Brown paper bag release to fix version handling in pool information.
538 ## [2.6.7] - 2023-07-03
542 - Ensure worker queued tasks at error are reassigned to other pool workers.
546 - Add pool `utilization` ratio to pool information.
547 - Add `version` to pool information.
548 - Add worker information to worker nodes.
550 ## [2.6.6] - 2023-07-01
554 - Add safe helper `availableParallelism()` to help sizing the pool.
558 - Ensure message handler is only registered in worker.
560 ## [2.6.5] - 2023-06-27
564 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
568 - Artificial version bump to 2.6.5 to workaround publication issue.
569 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
570 - Ensure pool event is emitted before task error promise rejection.
571 - Fix queued tasks count computation.
575 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
577 ## [2.6.4] - 2023-06-27
581 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
585 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
586 - Ensure pool event is emitted before task error promise rejection.
587 - Fix queued tasks count computation.
591 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
593 ## [2.6.3] - 2023-06-19
597 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
598 - Update strategies internals after statistics computation.
602 - Optimize O(1) queue implementation.
604 ## [2.6.2] - 2023-06-12
608 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
610 ## [2.6.1] - 2023-06-10
614 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
618 - Fix average statistics computation: ensure failed tasks are not accounted.
620 ## [2.6.0] - 2023-06-09
624 - Add `LEAST_ELU` worker choice strategy (experimental).
625 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
629 - Refactor pool worker node usage internals.
630 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
631 - Breaking change: pool information `info` property object fields have been renamed.
635 - Fix wait time accounting.
636 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
637 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
639 ## [2.5.4] - 2023-06-07
643 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
647 - Compute statistics at the worker level only if needed.
648 - Add `worker_threads` options to thread pool options.
652 - Make the `LEAST_BUSY` strategy only relies on task runtime.
654 ## [2.5.3] - 2023-06-04
658 - Refine pool information content.
659 - Limit pool internals public exposure.
661 ## [2.5.2] - 2023-06-02
665 - Add `taskError` pool event for task execution error.
666 - Add pool information `info` property to pool.
667 - Emit pool information on `busy` and `full` pool events.
669 ## [2.5.1] - 2023-06-01
673 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
674 - Add `error` pool event for uncaught worker error.
676 ## [2.5.0] - 2023-05-31
680 - Switch pool event emitter to `EventEmitterAsyncResource`.
681 - Add tasks wait time accounting in per worker tasks usage.
682 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
686 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
688 ## [2.4.14] - 2023-05-09
692 - Ensure no undefined task runtime can land in the tasks history.
693 - Fix median computation implementation once again.
697 - Unit tests for median and queue implementations.
699 ## [2.4.13] - 2023-05-08
703 - Fix worker choice strategy options validation.
704 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
706 ## [2.4.12] - 2023-05-06
710 - Support multiple task functions per worker.
711 - Add custom worker weights support to worker choice strategies options.
715 - Use O(1) queue implementation for tasks queueing.
719 - Fix median computation implementation.
720 - Fix fair share worker choice strategy internals update.
722 ## [2.4.11] - 2023-04-23
726 - Optimize free worker finding in worker choice strategies.
728 ## [2.4.10] - 2023-04-15
732 - Fix typescript type definition for task function: ensure the input data is optional.
733 - Fix typescript type definition for pool execute(): ensure the input data is optional.
735 ## [2.4.9] - 2023-04-15
739 - Add tasks queue enablement runtime setter to pool.
740 - Add tasks queue options runtime setter to pool.
741 - Add worker choice strategy options runtime setter to pool.
745 - Remove the tasks queuing experimental status.
749 - Fix task function type definition and validation.
750 - Fix worker choice strategy options handling.
752 ## [2.4.8] - 2023-04-12
756 - Fix message between main worker and worker type definition for tasks.
757 - Fix code documentation.
759 ## [2.4.7] - 2023-04-11
763 - Add worker tasks queue options to pool options.
767 - Fix missing documentation.
769 ## [2.4.6] - 2023-04-10
773 - Ensure one task at a time is executed per worker with tasks queueing enabled.
774 - Properly count worker executing tasks with tasks queueing enabled.
776 ## [2.4.5] - 2023-04-09
780 - Use monotonic high resolution timer for worker tasks runtime.
781 - Add worker tasks median runtime to statistics.
782 - Add worker tasks queue (experimental).
784 ## [2.4.4] - 2023-04-07
788 - Add `PoolEvents` enumeration and `PoolEvent` type.
792 - Destroy worker only on alive check.
794 ## [2.4.3] - 2023-04-07
798 - Fix typedoc generation with inheritance.
800 ## [2.4.2] - 2023-04-06
804 - Add `full` event to dynamic pool.
805 - Keep worker choice strategy in memory for conditional reuse.
809 - Fix possible negative worker key at worker removal in worker choice strategies.
811 ## [2.4.1] - 2023-04-05
815 - Optimize worker choice strategy for dynamic pool.
819 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
821 ## [2.4.0] - 2023-04-04
825 - Add `LESS_BUSY` worker choice strategy.
829 - Optimize worker storage in pool.
830 - Optimize worker alive status check.
831 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
832 - Optimize `LESS_USED` worker choice strategy.
833 - Update benchmark versus external threads pools.
834 - Optimize tasks usage statistics requirements for worker choice strategy.
838 - Ensure trimmable characters are checked at pool initialization.
839 - Fix message id integer overflow.
840 - Fix pool worker removal in worker choice strategy internals.
841 - Fix package publication with pnpm.
843 ## [2.4.0-3] - 2023-04-04
847 - Add `LESS_BUSY` worker choice strategy.
851 - Optimize worker storage in pool.
852 - Optimize worker alive status check.
853 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
854 - Optimize `LESS_USED` worker choice strategy.
855 - Update benchmark versus external threads pools.
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 ## [2.4.0-2] - 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.
882 - Fix package publication with pnpm.
884 ## [2.4.0-1] - 2023-04-03
888 - Add `LESS_BUSY` worker choice strategy.
892 - Optimize worker storage in pool.
893 - Optimize worker alive status check.
894 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
895 - Optimize `LESS_USED` worker choice strategy.
899 - Ensure trimmable characters are checked at pool initialization.
900 - Fix message id integer overflow.
901 - Fix pool worker removal in worker choice strategy internals.
903 ## [2.4.0-0] - 2023-04-03
907 - Add `LESS_BUSY` worker choice strategy.
911 - Optimize worker storage in pool.
912 - Optimize worker alive status check.
913 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
914 - Optimize `LESS_USED` worker choice strategy.
918 - Ensure trimmable characters are checked at pool initialization.
919 - Fix message id integer overflow.
920 - Fix pool worker removal in worker choice strategy internals.
922 ## [2.3.10] - 2023-03-18
926 - Fix package.json `exports` syntax for ESM and CommonJS.
930 - Permit SemVer pre-release publication.
932 ## [2.3.10-2] - 2023-03-18
936 - Fix package.json `exports` syntax for ESM and CommonJS.
938 ## [2.3.10-1] - 2023-03-18
942 - Permit SemVer pre-release publication.
944 ## [2.3.10-0] - 2023-03-18
948 - Fix package.json `exports` syntax for ESM and CommonJS.
950 ## [2.3.9] - 2023-03-18
954 - Introduce ESM module support along with CommonJS one.
958 - Fix brown paper bag bug referencing the same object literal.
960 ## [2.3.8] - 2023-03-18
964 - Switch internal benchmarking code to benny.
965 - Switch to TypeScript 5.x.x.
966 - Switch rollup bundler plugins to core ones.
967 - Switch to TSDoc syntax.
968 - Enforce conventional commits.
972 - Fix random integer generator.
973 - Fix worker choice strategy pool type identification at initialization.
975 ## [2.3.7] - 2022-10-23
979 - Switch to open collective FOSS project funding platform.
980 - Switch to ts-standard linter configuration on TypeScript code.
984 - Fixed missing async on pool execute method.
985 - Fixed typing in TypeScript example.
986 - Fixed types in unit tests.
988 ## [2.3.6] - 2022-10-22
992 - Cleanup pool attributes and methods.
993 - Refine error types thrown.
997 - Fix continuous integration build on windows.
998 - Fix code coverage reporting by using c8 instead of nyc.
1000 ## [2.3.5] - 2022-10-21
1004 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
1005 - Optimize tasks usage lookup implementation.
1009 - Fix missed pool event emitter type export.
1010 - Fix typedoc documentation generation.
1012 ## [2.3.4] - 2022-10-17
1016 - Fully automate release process with release-it.
1020 - Optimize fair share task scheduling algorithm implementation.
1021 - Update benchmark versus external pools results with latest version.
1023 ## [2.3.3] - 2022-10-15
1027 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
1029 ## [2.3.2] - 2022-10-14
1033 - Optimize fair share worker selection strategy implementation.
1037 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
1039 ## [2.3.1] - 2022-10-13
1043 - Pool worker choice strategies:
1044 - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
1045 - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
1047 ## [2.2.2] - 2022-10-09
1051 - Fixed `README.md` file.
1053 ## [2.2.1] - 2022-10-08
1057 - Dynamic worker choice strategy change at runtime.
1059 ## [2.2.0] - 2022-01-05
1061 ### Breaking Changes
1063 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
1065 ## [2.1.0] - 2021-08-29
1069 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
1071 ### Breaking Changes
1073 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
1074 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
1075 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
1076 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
1078 ## [2.0.2] - 2021-05-12
1082 - Fix `busy` event emission on fixed pool type
1084 ## [2.0.1] - 2021-03-16
1088 - Check if pool options are properly set.
1089 - `busy` event is emitted on all pool types.
1091 ## [2.0.0] - 2021-03-01
1095 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1097 ### Breaking Changes
1099 - `FullPool` event is now renamed to `busy`.
1100 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1101 _Find more details on our JSDoc._
1103 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1105 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1107 ### Pool options types declaration merge
1109 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1111 #### New `export` strategy
1115 const DynamicThreadPool = require('poolifier/lib/dynamic')
1117 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1120 But you should always prefer just using
1123 const { DynamicThreadPool } = require('poolifier')
1126 #### New type definitions for input data and response
1128 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1129 _This is not a limitation by poolifier but Node.js._
1131 #### Public property replacements
1133 `numWorkers` property is now `numberOfWorkers`
1135 #### Internal (protected) properties and methods renaming
1137 These properties are not intended for end users
1139 - `id` => `nextMessageId`
1141 These methods are not intended for end users
1143 - `_chooseWorker` => `chooseWorker`
1144 - `_newWorker` => `createWorker`
1145 - `_execute` => `internalExecute`
1146 - `_chooseWorker` => `chooseWorker`
1147 - `_checkAlive` => `checkAlive`
1149 - `_runAsync` => `runAsync`
1151 ## [1.1.0] - 2020-05-21
1155 - ThreadWorker support async functions as option
1156 - Various external library patches
1158 ## [1.0.0] - 2020-01-24
1162 - FixedThreadPool implementation
1163 - DynamicThreadPool implementation
1164 - WorkerThread implementation to improve developer experience