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 - Wait for queued tasks to end at worker termination.
14 ## [3.1.1] - 2023-12-16
18 - Fix pool options TS type definition.
20 ## [3.1.0] - 2023-12-16
24 - TypeScript breaking change: merge ThreadPoolOptions and ClusterPoolOptions types into PoolOptions type.
26 ## [3.0.14] - 2023-12-13
30 - Fix possible null exception with worker_threads pools.
32 ## [3.0.13] - 2023-12-12
36 - Ensure worker choice strategy wait for worker nodes readiness.
40 - Remove infinite retries support in worker choice strategy to avoid configuration leading to possible infinite recursion or loop.
42 ## [3.0.12] - 2023-12-12
46 - Add infinite retries support in worker choice strategy.
48 ## [3.0.11] - 2023-12-11
52 - Ensure pool asynchronous resource properly track tasks execution.
54 ## [3.0.10] - 2023-12-08
58 - Add a fastpath when tasks stealing or redistribution is impossible.
60 ## [3.0.9] - 2023-11-26
64 - Remove all pool events listener at pool destroying.
65 - Remove all worker node events listener at worker node destroying.
66 - Fix worker node event emitter listeners handling memory leak at pool options runtime change.
68 ## [3.0.8] - 2023-11-25
72 - Ensure continuous tasks stealing on idle start at worker node idling.
74 ## [3.0.7] - 2023-11-24
78 - Make continuous tasks stealing start at worker node idling.
80 ## [3.0.6] - 2023-11-24
84 - Ensure pool statuses are checked at initialization, `start()` or `destroy()`.
85 - Ensure pool `ready` event can be emitted after several `start()/destroy()` cycles.
87 ## [3.0.5] - 2023-10-27
91 - Ensure pool `ready` event can be emitted only once.
93 ## [3.0.4] - 2023-10-20
97 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
98 - Use builtin retry mechanism in worker choice strategies instead of custom one.
100 ## [3.0.3] - 2023-10-19
104 - Avoid null exception at sending message to worker.
105 - Avoid null exception at checking worker node readiness.
107 ## [3.0.2] - 2023-10-17
111 - 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).
113 ## [3.0.1] - 2023-10-16
117 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
121 - Switch the worker node eventing code to `EventTarget` API.
123 ## [3.0.0] - 2023-10-08
127 - Remove Node.js 16.x.x (EOL) support.
129 ## [2.7.5] - 2023-10-03
133 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
135 ## [2.7.4] - 2023-09-25
139 - Fix source maps (bundler issue).
141 ## [2.7.3] - 2023-09-24
145 - Convert pool event emitter to event emitter async resource.
147 ## [2.7.2] - 2023-09-23
151 - Add source maps to npm package to ease debugging.
155 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
157 ## [2.7.1] - 2023-09-20
161 - Ensure worker message listener used one time are removed after usage.
163 ## [2.7.0] - 2023-09-19
167 - Fix task stealing related tasks queue options handling at runtime.
171 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
175 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
176 - Stricter worker constructor arguments validation.
178 ## [2.6.45] - 2023-09-17
182 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
186 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
187 - Add `start()` method to pool API to start the minimum number of workers.
188 - 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.
189 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
191 ## [2.6.44] - 2023-09-08
195 - Use a dedicated PAT to publish on GitHub packages registry.
199 - Publish on GitHub packages registry on release.
203 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
205 ## [2.6.43] - 2023-09-08
209 - Publish on GitHub packages registry on release.
213 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
215 ## [2.6.42] - 2023-09-06
219 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
221 ## [2.6.41] - 2023-09-03
225 - Optimize worker choice strategies implementation.
227 ## [2.6.40] - 2023-09-01
231 - Do not pre-choose in WRR worker choice strategy to avoid bias.
232 - Avoid array out of bound in worker choice strategies after worker node removal.
234 ## [2.6.39] - 2023-08-30
238 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
240 ## [2.6.38] - 2023-08-30
244 - Bundle typescript types declaration into one file.
248 - Improve interleaved weighted round robin worker choice strategy implementation.
250 ## [2.6.37] - 2023-08-28
254 - Ensure unused worker usage statistics are deleted at runtime.
258 - Rename worker choice strategy options `choiceRetries` to `retries`.
259 - Avoid unnecessary branching in worker choice strategies.
261 ## [2.6.36] - 2023-08-27
265 - Fix pool `execute()` arguments check.
269 - Make continuous tasks stealing algorithm less aggressive.
270 - Fine tune tasks stealing algorithm under back pressure.
272 ## [2.6.35] - 2023-08-25
276 - Don't account worker usage statistics for tasks that have failed.
277 - Fix pool information runtime and wait time median computation.
281 - Update simple moving average implementation to use a circular buffer.
282 - Update simple moving median implementation to use a circular buffer.
283 - Account for stolen tasks in worker usage statistics and pool information.
287 - Continuous tasks stealing algorithm.
289 ## [2.6.34] - 2023-08-24
293 - Avoid cascading tasks stealing under back pressure.
297 - Add fastpath to queued tasks rescheduling.
299 ## [2.6.33] - 2023-08-24
303 - Fix queued tasks rescheduling.
307 - Rename tasks queue options `queueMaxSize` to `size`.
311 - Task stealing scheduling algorithm if tasks queueing is enabled.
313 ## [2.6.32] - 2023-08-23
317 - Ensure no task can be executed when the pool is destroyed.
321 - Add `queueMaxSize` option to tasks queue options.
322 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
323 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
325 ## [2.6.31] - 2023-08-20
329 - Fix worker choice strategy retries mechanism in some edge cases.
333 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
334 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
336 ## [2.6.30] - 2023-08-19
340 - Ensure pool event `backPressure` is emitted.
341 - Ensure pool event `full` is emitted only once.
342 - Ensure worker node cannot be instantiated without proper arguments.
344 ## [2.6.29] - 2023-08-18
348 - Fix race condition between readiness and task functions worker message handling at startup.
349 - Fix duplicate task function worker usage statistics computation per task function.
350 - Update task function worker usage statistics if and only if there's at least two different task functions.
351 - Fix race condition at task function worker usage executing task computation leading to negative value.
355 - 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).
356 - Use back pressure detection in worker choice strategies.
357 - Add worker choice strategies retries mechanism if no worker is eligible.
359 ## [2.6.28] - 2023-08-16
363 - Ensure pool workers are properly initialized.
367 - HTTP server pool examples: express-cluster, express-hybrid.
371 - Remove now useless branching in worker hot code path.
373 ## [2.6.27] - 2023-08-15
377 - Add `KillHandler` type definition to exported types.
381 - Add `destroy` event to pool API.
383 ## [2.6.26] - 2023-08-15
387 - Add kill handler to worker options allowing to execute custom code when worker is killed.
388 - Add `listTaskFunctions()` method to pool API.
389 - SMTP client pool example: nodemailer.
391 ## [2.6.25] - 2023-08-13
395 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
396 - WebSocket server pool examples: ws-cluster, ws-hybrid.
398 ## [2.6.24] - 2023-08-12
402 - Add array of transferable objects to the `execute()` method arguments.
403 - WebSocket server pool examples: ws-worker_threads.
405 ## [2.6.23] - 2023-08-11
409 - 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.
413 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
414 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
416 ## [2.6.22] - 2023-08-10
420 - Add missing `types` field to package.json `exports`.
424 - Structure markdown documentation (PR #811).
426 ## [2.6.21] - 2023-08-03
430 - Improve code documentation.
431 - Code refactoring and cleanup for better maintainability and readability.
433 ## [2.6.20] - 2023-07-21
437 - Fix queued tasks redistribution on error task execution starvation.
438 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
442 - Drastically reduce lookups by worker in the worker nodes.
444 ## [2.6.19] - 2023-07-20
448 - Dedicated internal communication channel for worker_threads pools.
450 ## [2.6.18] - 2023-07-19
454 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
456 ## [2.6.17] - 2023-07-16
460 - Add `listTaskFunctions()` method to worker API.
462 ## [2.6.16] - 2023-07-12
466 - Fix pool startup detection.
467 - Fix worker task functions handling.
469 ## [2.6.15] - 2023-07-11
473 - Take into account worker node readiness in worker choice strategies.
475 ## [2.6.14] - 2023-07-10
479 - Fix task function statistics tracking.
481 ## [2.6.13] - 2023-07-10
485 - Add per task function statistics tracking.
486 - Add public methods to manipulate the worker task functions at runtime.
488 ## [2.6.12] - 2023-07-09
492 - Workaround import issue with `node:os` module in node 16.x.x.
494 ## [2.6.11] - 2023-07-09
498 - Fix pool readiness semantic.
500 ## [2.6.10] - 2023-07-08
504 - Ensure workers are not recreated on error at pool startup.
508 - Add `ready` and `strategy` fields to pool information.
509 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
510 - Add dynamic pool sizing checks.
512 ## [2.6.9] - 2023-07-07
516 - Recreate the right worker type on uncaught exception.
520 - Add minimum and maximum to internal measurement statistics.
521 - Add `runTime` and `waitTime` to pool information.
522 - Check worker inactive time only on dynamic worker.
524 ## [2.6.8] - 2023-07-03
528 - Brown paper bag release to fix version handling in pool information.
530 ## [2.6.7] - 2023-07-03
534 - Ensure worker queued tasks at error are reassigned to other pool workers.
538 - Add pool `utilization` ratio to pool information.
539 - Add `version` to pool information.
540 - Add worker information to worker nodes.
542 ## [2.6.6] - 2023-07-01
546 - Add safe helper `availableParallelism()` to help sizing the pool.
550 - Ensure message handler is only registered in worker.
552 ## [2.6.5] - 2023-06-27
556 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
560 - Artificial version bump to 2.6.5 to workaround publication issue.
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 ## [2.6.4] - 2023-06-27
573 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
577 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
578 - Ensure pool event is emitted before task error promise rejection.
579 - Fix queued tasks count computation.
583 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
585 ## [2.6.3] - 2023-06-19
589 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
590 - Update strategies internals after statistics computation.
594 - Optimize O(1) queue implementation.
596 ## [2.6.2] - 2023-06-12
600 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
602 ## [2.6.1] - 2023-06-10
606 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
610 - Fix average statistics computation: ensure failed tasks are not accounted.
612 ## [2.6.0] - 2023-06-09
616 - Add `LEAST_ELU` worker choice strategy (experimental).
617 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
621 - Refactor pool worker node usage internals.
622 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
623 - Breaking change: pool information `info` property object fields have been renamed.
627 - Fix wait time accounting.
628 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
629 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
631 ## [2.5.4] - 2023-06-07
635 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
639 - Compute statistics at the worker level only if needed.
640 - Add `worker_threads` options to thread pool options.
644 - Make the `LEAST_BUSY` strategy only relies on task runtime.
646 ## [2.5.3] - 2023-06-04
650 - Refine pool information content.
651 - Limit pool internals public exposure.
653 ## [2.5.2] - 2023-06-02
657 - Add `taskError` pool event for task execution error.
658 - Add pool information `info` property to pool.
659 - Emit pool information on `busy` and `full` pool events.
661 ## [2.5.1] - 2023-06-01
665 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
666 - Add `error` pool event for uncaught worker error.
668 ## [2.5.0] - 2023-05-31
672 - Switch pool event emitter to `EventEmitterAsyncResource`.
673 - Add tasks wait time accounting in per worker tasks usage.
674 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
678 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
680 ## [2.4.14] - 2023-05-09
684 - Ensure no undefined task runtime can land in the tasks history.
685 - Fix median computation implementation once again.
689 - Unit tests for median and queue implementations.
691 ## [2.4.13] - 2023-05-08
695 - Fix worker choice strategy options validation.
696 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
698 ## [2.4.12] - 2023-05-06
702 - Support multiple task functions per worker.
703 - Add custom worker weights support to worker choice strategies options.
707 - Use O(1) queue implementation for tasks queueing.
711 - Fix median computation implementation.
712 - Fix fair share worker choice strategy internals update.
714 ## [2.4.11] - 2023-04-23
718 - Optimize free worker finding in worker choice strategies.
720 ## [2.4.10] - 2023-04-15
724 - Fix typescript type definition for task function: ensure the input data is optional.
725 - Fix typescript type definition for pool execute(): ensure the input data is optional.
727 ## [2.4.9] - 2023-04-15
731 - Add tasks queue enablement runtime setter to pool.
732 - Add tasks queue options runtime setter to pool.
733 - Add worker choice strategy options runtime setter to pool.
737 - Remove the tasks queuing experimental status.
741 - Fix task function type definition and validation.
742 - Fix worker choice strategy options handling.
744 ## [2.4.8] - 2023-04-12
748 - Fix message between main worker and worker type definition for tasks.
749 - Fix code documentation.
751 ## [2.4.7] - 2023-04-11
755 - Add worker tasks queue options to pool options.
759 - Fix missing documentation.
761 ## [2.4.6] - 2023-04-10
765 - Ensure one task at a time is executed per worker with tasks queueing enabled.
766 - Properly count worker executing tasks with tasks queueing enabled.
768 ## [2.4.5] - 2023-04-09
772 - Use monotonic high resolution timer for worker tasks runtime.
773 - Add worker tasks median runtime to statistics.
774 - Add worker tasks queue (experimental).
776 ## [2.4.4] - 2023-04-07
780 - Add `PoolEvents` enumeration and `PoolEvent` type.
784 - Destroy worker only on alive check.
786 ## [2.4.3] - 2023-04-07
790 - Fix typedoc generation with inheritance.
792 ## [2.4.2] - 2023-04-06
796 - Add `full` event to dynamic pool.
797 - Keep worker choice strategy in memory for conditional reuse.
801 - Fix possible negative worker key at worker removal in worker choice strategies.
803 ## [2.4.1] - 2023-04-05
807 - Optimize worker choice strategy for dynamic pool.
811 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
813 ## [2.4.0] - 2023-04-04
817 - Add `LESS_BUSY` worker choice strategy.
821 - Optimize worker storage in pool.
822 - Optimize worker alive status check.
823 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
824 - Optimize `LESS_USED` worker choice strategy.
825 - Update benchmark versus external threads pools.
826 - Optimize tasks usage statistics requirements for worker choice strategy.
830 - Ensure trimmable characters are checked at pool initialization.
831 - Fix message id integer overflow.
832 - Fix pool worker removal in worker choice strategy internals.
833 - Fix package publication with pnpm.
835 ## [2.4.0-3] - 2023-04-04
839 - Add `LESS_BUSY` worker choice strategy.
843 - Optimize worker storage in pool.
844 - Optimize worker alive status check.
845 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
846 - Optimize `LESS_USED` worker choice strategy.
847 - Update benchmark versus external threads pools.
851 - Ensure trimmable characters are checked at pool initialization.
852 - Fix message id integer overflow.
853 - Fix pool worker removal in worker choice strategy internals.
854 - Fix package publication with pnpm.
856 ## [2.4.0-2] - 2023-04-03
860 - Add `LESS_BUSY` worker choice strategy.
864 - Optimize worker storage in pool.
865 - Optimize worker alive status check.
866 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
867 - Optimize `LESS_USED` worker choice strategy.
871 - Ensure trimmable characters are checked at pool initialization.
872 - Fix message id integer overflow.
873 - Fix pool worker removal in worker choice strategy internals.
874 - Fix package publication with pnpm.
876 ## [2.4.0-1] - 2023-04-03
880 - Add `LESS_BUSY` worker choice strategy.
884 - Optimize worker storage in pool.
885 - Optimize worker alive status check.
886 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
887 - Optimize `LESS_USED` worker choice strategy.
891 - Ensure trimmable characters are checked at pool initialization.
892 - Fix message id integer overflow.
893 - Fix pool worker removal in worker choice strategy internals.
895 ## [2.4.0-0] - 2023-04-03
899 - Add `LESS_BUSY` worker choice strategy.
903 - Optimize worker storage in pool.
904 - Optimize worker alive status check.
905 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
906 - Optimize `LESS_USED` worker choice strategy.
910 - Ensure trimmable characters are checked at pool initialization.
911 - Fix message id integer overflow.
912 - Fix pool worker removal in worker choice strategy internals.
914 ## [2.3.10] - 2023-03-18
918 - Fix package.json `exports` syntax for ESM and CommonJS.
922 - Permit SemVer pre-release publication.
924 ## [2.3.10-2] - 2023-03-18
928 - Fix package.json `exports` syntax for ESM and CommonJS.
930 ## [2.3.10-1] - 2023-03-18
934 - Permit SemVer pre-release publication.
936 ## [2.3.10-0] - 2023-03-18
940 - Fix package.json `exports` syntax for ESM and CommonJS.
942 ## [2.3.9] - 2023-03-18
946 - Introduce ESM module support along with CommonJS one.
950 - Fix brown paper bag bug referencing the same object literal.
952 ## [2.3.8] - 2023-03-18
956 - Switch internal benchmarking code to benny.
957 - Switch to TypeScript 5.x.x.
958 - Switch rollup bundler plugins to core ones.
959 - Switch to TSDoc syntax.
960 - Enforce conventional commits.
964 - Fix random integer generator.
965 - Fix worker choice strategy pool type identification at initialization.
967 ## [2.3.7] - 2022-10-23
971 - Switch to open collective FOSS project funding platform.
972 - Switch to ts-standard linter configuration on TypeScript code.
976 - Fixed missing async on pool execute method.
977 - Fixed typing in TypeScript example.
978 - Fixed types in unit tests.
980 ## [2.3.6] - 2022-10-22
984 - Cleanup pool attributes and methods.
985 - Refine error types thrown.
989 - Fix continuous integration build on windows.
990 - Fix code coverage reporting by using c8 instead of nyc.
992 ## [2.3.5] - 2022-10-21
996 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
997 - Optimize tasks usage lookup implementation.
1001 - Fix missed pool event emitter type export.
1002 - Fix typedoc documentation generation.
1004 ## [2.3.4] - 2022-10-17
1008 - Fully automate release process with release-it.
1012 - Optimize fair share task scheduling algorithm implementation.
1013 - Update benchmark versus external pools results with latest version.
1015 ## [2.3.3] - 2022-10-15
1019 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
1021 ## [2.3.2] - 2022-10-14
1025 - Optimize fair share worker selection strategy implementation.
1029 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
1031 ## [2.3.1] - 2022-10-13
1035 - Pool worker choice strategies:
1036 - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
1037 - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
1039 ## [2.2.2] - 2022-10-09
1043 - Fixed `README.md` file.
1045 ## [2.2.1] - 2022-10-08
1049 - Dynamic worker choice strategy change at runtime.
1051 ## [2.2.0] - 2022-01-05
1053 ### Breaking Changes
1055 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
1057 ## [2.1.0] - 2021-08-29
1061 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
1063 ### Breaking Changes
1065 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
1066 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
1067 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
1068 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
1070 ## [2.0.2] - 2021-05-12
1074 - Fix `busy` event emission on fixed pool type
1076 ## [2.0.1] - 2021-03-16
1080 - Check if pool options are properly set.
1081 - `busy` event is emitted on all pool types.
1083 ## [2.0.0] - 2021-03-01
1087 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1089 ### Breaking Changes
1091 - `FullPool` event is now renamed to `busy`.
1092 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1093 _Find more details on our JSDoc._
1095 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1097 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1099 ### Pool options types declaration merge
1101 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1103 #### New `export` strategy
1107 const DynamicThreadPool = require('poolifier/lib/dynamic')
1109 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1112 But you should always prefer just using
1115 const { DynamicThreadPool } = require('poolifier')
1118 #### New type definitions for input data and response
1120 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1121 _This is not a limitation by poolifier but Node.js._
1123 #### Public property replacements
1125 `numWorkers` property is now `numberOfWorkers`
1127 #### Internal (protected) properties and methods renaming
1129 These properties are not intended for end users
1131 - `id` => `nextMessageId`
1133 These methods are not intended for end users
1135 - `_chooseWorker` => `chooseWorker`
1136 - `_newWorker` => `createWorker`
1137 - `_execute` => `internalExecute`
1138 - `_chooseWorker` => `chooseWorker`
1139 - `_checkAlive` => `checkAlive`
1141 - `_runAsync` => `runAsync`
1143 ## [1.1.0] - 2020-05-21
1147 - ThreadWorker support async functions as option
1148 - Various external library patches
1150 ## [1.0.0] - 2020-01-24
1154 - FixedThreadPool implementation
1155 - DynamicThreadPool implementation
1156 - WorkerThread implementation to improve developer experience