3 All notable changes to this project will be documented in this file.
5 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
6 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
12 - Ensure pool statuses are checked at initialization, `start()` or `destroy()`.
14 ## [3.0.5] - 2023-10-27
18 - Ensure pool ready event can be emitted only once.
20 ## [3.0.4] - 2023-10-20
24 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
25 - Use builtin retry mechanism in worker choice strategies instead of custom one.
27 ## [3.0.3] - 2023-10-19
31 - Avoid null exception at sending message to worker.
32 - Avoid null exception at checking worker node readiness.
34 ## [3.0.2] - 2023-10-17
38 - 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).
40 ## [3.0.1] - 2023-10-16
44 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
48 - Switch the worker node eventing code to `EventTarget` API.
50 ## [3.0.0] - 2023-10-08
54 - Remove Node.js 16.x.x (EOL) support.
56 ## [2.7.5] - 2023-10-03
60 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
62 ## [2.7.4] - 2023-09-25
66 - Fix source maps (bundler issue).
68 ## [2.7.3] - 2023-09-24
72 - Convert pool event emitter to event emitter async resource.
74 ## [2.7.2] - 2023-09-23
78 - Add source maps to npm package to ease debugging.
82 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
84 ## [2.7.1] - 2023-09-20
88 - Ensure worker message listener used one time are removed after usage.
90 ## [2.7.0] - 2023-09-19
94 - Fix task stealing related tasks queue options handling at runtime.
98 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
102 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
103 - Stricter worker constructor arguments validation.
105 ## [2.6.45] - 2023-09-17
109 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
113 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
114 - Add `start()` method to pool API to start the minimum number of workers.
115 - 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.
116 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
118 ## [2.6.44] - 2023-09-08
122 - Use a dedicated PAT to publish on GitHub packages registry.
126 - Publish on GitHub packages registry on release.
130 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
132 ## [2.6.43] - 2023-09-08
136 - Publish on GitHub packages registry on release.
140 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
142 ## [2.6.42] - 2023-09-06
146 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
148 ## [2.6.41] - 2023-09-03
152 - Optimize worker choice strategies implementation.
154 ## [2.6.40] - 2023-09-01
158 - Do not pre-choose in WRR worker choice strategy to avoid bias.
159 - Avoid array out of bound in worker choice strategies after worker node removal.
161 ## [2.6.39] - 2023-08-30
165 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
167 ## [2.6.38] - 2023-08-30
171 - Bundle typescript types declaration into one file.
175 - Improve interleaved weighted round robin worker choice strategy implementation.
177 ## [2.6.37] - 2023-08-28
181 - Ensure unused worker usage statistics are deleted at runtime.
185 - Rename worker choice strategy options `choiceRetries` to `retries`.
186 - Avoid unnecessary branching in worker choice strategies.
188 ## [2.6.36] - 2023-08-27
192 - Fix pool `execute()` arguments check.
196 - Make continuous tasks stealing algorithm less aggressive.
197 - Fine tune tasks stealing algorithm under back pressure.
199 ## [2.6.35] - 2023-08-25
203 - Don't account worker usage statistics for tasks that have failed.
204 - Fix pool information runtime and wait time median computation.
208 - Update simple moving average implementation to use a circular buffer.
209 - Update simple moving median implementation to use a circular buffer.
210 - Account for stolen tasks in worker usage statistics and pool information.
214 - Continuous tasks stealing algorithm.
216 ## [2.6.34] - 2023-08-24
220 - Avoid cascading tasks stealing under back pressure.
224 - Add fastpath to queued tasks rescheduling.
226 ## [2.6.33] - 2023-08-24
230 - Fix queued tasks rescheduling.
234 - Rename tasks queue options `queueMaxSize` to `size`.
238 - Task stealing scheduling algorithm if tasks queueing is enabled.
240 ## [2.6.32] - 2023-08-23
244 - Ensure no task can be executed when the pool is destroyed.
248 - Add `queueMaxSize` option to tasks queue options.
249 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
250 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
252 ## [2.6.31] - 2023-08-20
256 - Fix worker choice strategy retries mechanism in some edge cases.
260 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
261 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
263 ## [2.6.30] - 2023-08-19
267 - Ensure pool event `backPressure` is emitted.
268 - Ensure pool event `full` is emitted only once.
269 - Ensure worker node cannot be instantiated without proper arguments.
271 ## [2.6.29] - 2023-08-18
275 - Fix race condition between ready and task functions worker message handling at startup.
276 - Fix duplicate task function worker usage statistics computation per task function.
277 - Update task function worker usage statistics if and only if there's at least two different task functions.
278 - Fix race condition at task function worker usage executing task computation leading to negative value.
282 - 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).
283 - Use back pressure detection in worker choice strategies.
284 - Add worker choice strategies retries mechanism if no worker is eligible.
286 ## [2.6.28] - 2023-08-16
290 - Ensure pool workers are properly initialized.
294 - HTTP server pool examples: express-cluster, express-hybrid.
298 - Remove now useless branching in worker hot code path.
300 ## [2.6.27] - 2023-08-15
304 - Add `KillHandler` type definition to exported types.
308 - Add `destroy` event to pool API.
310 ## [2.6.26] - 2023-08-15
314 - Add kill handler to worker options allowing to execute custom code when worker is killed.
315 - Add `listTaskFunctions()` method to pool API.
316 - SMTP client pool example: nodemailer.
318 ## [2.6.25] - 2023-08-13
322 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
323 - WebSocket server pool examples: ws-cluster, ws-hybrid.
325 ## [2.6.24] - 2023-08-12
329 - Add array of transferable objects to the `execute()` method arguments.
330 - WebSocket server pool examples: ws-worker_threads.
332 ## [2.6.23] - 2023-08-11
336 - 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.
340 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
341 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
343 ## [2.6.22] - 2023-08-10
347 - Add missing `types` field to package.json `exports`.
351 - Structure markdown documentation (PR #811).
353 ## [2.6.21] - 2023-08-03
357 - Improve code documentation.
358 - Code refactoring and cleanup for better maintainability and readability.
360 ## [2.6.20] - 2023-07-21
364 - Fix queued tasks redistribution on error task execution starvation.
365 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
369 - Drastically reduce lookups by worker in the worker nodes.
371 ## [2.6.19] - 2023-07-20
375 - Dedicated internal communication channel for worker_threads pools.
377 ## [2.6.18] - 2023-07-19
381 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
383 ## [2.6.17] - 2023-07-16
387 - Add `listTaskFunctions()` method to worker API.
389 ## [2.6.16] - 2023-07-12
393 - Fix pool startup detection.
394 - Fix worker task functions handling.
396 ## [2.6.15] - 2023-07-11
400 - Take into account worker node readiness in worker choice strategies.
402 ## [2.6.14] - 2023-07-10
406 - Fix task function statistics tracking.
408 ## [2.6.13] - 2023-07-10
412 - Add per task function statistics tracking.
413 - Add public methods to manipulate the worker task functions at runtime.
415 ## [2.6.12] - 2023-07-09
419 - Workaround import issue with `node:os` module in node 16.x.x.
421 ## [2.6.11] - 2023-07-09
425 - Fix pool readiness semantic.
427 ## [2.6.10] - 2023-07-08
431 - Ensure workers are not recreated on error at pool startup.
435 - Add `ready` and `strategy` fields to pool information.
436 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
437 - Add dynamic pool sizing checks.
439 ## [2.6.9] - 2023-07-07
443 - Recreate the right worker type on uncaught exception.
447 - Add minimum and maximum to internal measurement statistics.
448 - Add `runTime` and `waitTime` to pool information.
449 - Check worker inactive time only on dynamic worker.
451 ## [2.6.8] - 2023-07-03
455 - Brown paper bag release to fix version handling in pool information.
457 ## [2.6.7] - 2023-07-03
461 - Ensure worker queued tasks at error are reassigned to other pool workers.
465 - Add pool `utilization` ratio to pool information.
466 - Add `version` to pool information.
467 - Add worker information to worker nodes.
469 ## [2.6.6] - 2023-07-01
473 - Add safe helper `availableParallelism()` to help sizing the pool.
477 - Ensure message handler is only registered in worker.
479 ## [2.6.5] - 2023-06-27
483 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
487 - Artificial version bump to 2.6.5 to workaround publication issue.
488 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
489 - Ensure pool event is emitted before task error promise rejection.
490 - Fix queued tasks count computation.
494 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
496 ## [2.6.4] - 2023-06-27
500 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
504 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
505 - Ensure pool event is emitted before task error promise rejection.
506 - Fix queued tasks count computation.
510 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
512 ## [2.6.3] - 2023-06-19
516 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
517 - Update strategies internals after statistics computation.
521 - Optimize O(1) queue implementation.
523 ## [2.6.2] - 2023-06-12
527 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
529 ## [2.6.1] - 2023-06-10
533 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
537 - Fix average statistics computation: ensure failed tasks are not accounted.
539 ## [2.6.0] - 2023-06-09
543 - Add `LEAST_ELU` worker choice strategy (experimental).
544 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
548 - Refactor pool worker node usage internals.
549 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
550 - Breaking change: pool information `info` property object fields have been renamed.
554 - Fix wait time accounting.
555 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
556 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
558 ## [2.5.4] - 2023-06-07
562 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
566 - Compute statistics at the worker level only if needed.
567 - Add `worker_threads` options to thread pool options.
571 - Make the `LEAST_BUSY` strategy only relies on task runtime.
573 ## [2.5.3] - 2023-06-04
577 - Refine pool information content.
578 - Limit pool internals public exposure.
580 ## [2.5.2] - 2023-06-02
584 - Add `taskError` pool event for task execution error.
585 - Add pool information `info` property to pool.
586 - Emit pool information on `busy` and `full` pool events.
588 ## [2.5.1] - 2023-06-01
592 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
593 - Add `error` pool event for uncaught worker error.
595 ## [2.5.0] - 2023-05-31
599 - Switch pool event emitter to `EventEmitterAsyncResource`.
600 - Add tasks wait time accounting in per worker tasks usage.
601 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
605 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
607 ## [2.4.14] - 2023-05-09
611 - Ensure no undefined task runtime can land in the tasks history.
612 - Fix median computation implementation once again.
616 - Unit tests for median and queue implementations.
618 ## [2.4.13] - 2023-05-08
622 - Fix worker choice strategy options validation.
623 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
625 ## [2.4.12] - 2023-05-06
629 - Support multiple task functions per worker.
630 - Add custom worker weights support to worker choice strategies options.
634 - Use O(1) queue implementation for tasks queueing.
638 - Fix median computation implementation.
639 - Fix fair share worker choice strategy internals update.
641 ## [2.4.11] - 2023-04-23
645 - Optimize free worker finding in worker choice strategies.
647 ## [2.4.10] - 2023-04-15
651 - Fix typescript type definition for task function: ensure the input data is optional.
652 - Fix typescript type definition for pool execute(): ensure the input data is optional.
654 ## [2.4.9] - 2023-04-15
658 - Add tasks queue enablement runtime setter to pool.
659 - Add tasks queue options runtime setter to pool.
660 - Add worker choice strategy options runtime setter to pool.
664 - Remove the tasks queuing experimental status.
668 - Fix task function type definition and validation.
669 - Fix worker choice strategy options handling.
671 ## [2.4.8] - 2023-04-12
675 - Fix message between main worker and worker type definition for tasks.
676 - Fix code documentation.
678 ## [2.4.7] - 2023-04-11
682 - Add worker tasks queue options to pool options.
686 - Fix missing documentation.
688 ## [2.4.6] - 2023-04-10
692 - Ensure one task at a time is executed per worker with tasks queueing enabled.
693 - Properly count worker executing tasks with tasks queueing enabled.
695 ## [2.4.5] - 2023-04-09
699 - Use monotonic high resolution timer for worker tasks runtime.
700 - Add worker tasks median runtime to statistics.
701 - Add worker tasks queue (experimental).
703 ## [2.4.4] - 2023-04-07
707 - Add `PoolEvents` enumeration and `PoolEvent` type.
711 - Destroy worker only on alive check.
713 ## [2.4.3] - 2023-04-07
717 - Fix typedoc generation with inheritance.
719 ## [2.4.2] - 2023-04-06
723 - Add `full` event to dynamic pool.
724 - Keep worker choice strategy in memory for conditional reuse.
728 - Fix possible negative worker key at worker removal in worker choice strategies.
730 ## [2.4.1] - 2023-04-05
734 - Optimize worker choice strategy for dynamic pool.
738 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
740 ## [2.4.0] - 2023-04-04
744 - Add `LESS_BUSY` worker choice strategy.
748 - Optimize worker storage in pool.
749 - Optimize worker alive status check.
750 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
751 - Optimize `LESS_USED` worker choice strategy.
752 - Update benchmark versus external threads pools.
753 - Optimize tasks usage statistics requirements for worker choice strategy.
757 - Ensure trimmable characters are checked at pool initialization.
758 - Fix message id integer overflow.
759 - Fix pool worker removal in worker choice strategy internals.
760 - Fix package publication with pnpm.
762 ## [2.4.0-3] - 2023-04-04
766 - Add `LESS_BUSY` worker choice strategy.
770 - Optimize worker storage in pool.
771 - Optimize worker alive status check.
772 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
773 - Optimize `LESS_USED` worker choice strategy.
774 - Update benchmark versus external threads pools.
778 - Ensure trimmable characters are checked at pool initialization.
779 - Fix message id integer overflow.
780 - Fix pool worker removal in worker choice strategy internals.
781 - Fix package publication with pnpm.
783 ## [2.4.0-2] - 2023-04-03
787 - Add `LESS_BUSY` worker choice strategy.
791 - Optimize worker storage in pool.
792 - Optimize worker alive status check.
793 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
794 - Optimize `LESS_USED` worker choice strategy.
798 - Ensure trimmable characters are checked at pool initialization.
799 - Fix message id integer overflow.
800 - Fix pool worker removal in worker choice strategy internals.
801 - Fix package publication with pnpm.
803 ## [2.4.0-1] - 2023-04-03
807 - Add `LESS_BUSY` worker choice strategy.
811 - Optimize worker storage in pool.
812 - Optimize worker alive status check.
813 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
814 - Optimize `LESS_USED` 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.
822 ## [2.4.0-0] - 2023-04-03
826 - Add `LESS_BUSY` worker choice strategy.
830 - Optimize worker storage in pool.
831 - Optimize worker alive status check.
832 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
833 - Optimize `LESS_USED` worker choice strategy.
837 - Ensure trimmable characters are checked at pool initialization.
838 - Fix message id integer overflow.
839 - Fix pool worker removal in worker choice strategy internals.
841 ## [2.3.10] - 2023-03-18
845 - Fix package.json `exports` syntax for ESM and CommonJS.
849 - Permit SemVer pre-release publication.
851 ## [2.3.10-2] - 2023-03-18
855 - Fix package.json `exports` syntax for ESM and CommonJS.
857 ## [2.3.10-1] - 2023-03-18
861 - Permit SemVer pre-release publication.
863 ## [2.3.10-0] - 2023-03-18
867 - Fix package.json `exports` syntax for ESM and CommonJS.
869 ## [2.3.9] - 2023-03-18
873 - Introduce ESM module support along with CommonJS one.
877 - Fix brown paper bag bug referencing the same object literal.
879 ## [2.3.8] - 2023-03-18
883 - Switch internal benchmarking code to benny.
884 - Switch to TypeScript 5.x.x.
885 - Switch rollup bundler plugins to core ones.
886 - Switch to TSDoc syntax.
887 - Enforce conventional commits.
891 - Fix random integer generator.
892 - Fix worker choice strategy pool type identification at initialization.
894 ## [2.3.7] - 2022-10-23
898 - Switch to open collective FOSS project funding platform.
899 - Switch to ts-standard linter configuration on TypeScript code.
903 - Fixed missing async on pool execute method.
904 - Fixed typing in TypeScript example.
905 - Fixed types in unit tests.
907 ## [2.3.6] - 2022-10-22
911 - Cleanup pool attributes and methods.
912 - Refine error types thrown.
916 - Fix continuous integration build on windows.
917 - Fix code coverage reporting by using c8 instead of nyc.
919 ## [2.3.5] - 2022-10-21
923 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
924 - Optimize tasks usage lookup implementation.
928 - Fix missed pool event emitter type export.
929 - Fix typedoc documentation generation.
931 ## [2.3.4] - 2022-10-17
935 - Fully automate release process with release-it.
939 - Optimize fair share task scheduling algorithm implementation.
940 - Update benchmark versus external pools results with latest version.
942 ## [2.3.3] - 2022-10-15
946 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
948 ## [2.3.2] - 2022-10-14
952 - Optimize fair share worker selection strategy implementation.
956 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
958 ## [2.3.1] - 2022-10-13
962 - Pool worker choice strategies:
963 - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
964 - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
966 ## [2.2.2] - 2022-10-09
970 - Fixed `README.md` file.
972 ## [2.2.1] - 2022-10-08
976 - Dynamic worker choice strategy change at runtime.
978 ## [2.2.0] - 2022-01-05
982 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
984 ## [2.1.0] - 2021-08-29
988 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
992 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
993 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
994 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
995 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
997 ## [2.0.2] - 2021-05-12
1001 - Fix `busy` event emission on fixed pool type
1003 ## [2.0.1] - 2021-03-16
1007 - Check if pool options are properly set.
1008 - `busy` event is emitted on all pool types.
1010 ## [2.0.0] - 2021-03-01
1014 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1016 ### Breaking Changes
1018 - `FullPool` event is now renamed to `busy`.
1019 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1020 _Find more details on our JSDoc._
1022 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1024 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1026 ### Pool options types declaration merge
1028 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1030 #### New `export` strategy
1034 const DynamicThreadPool = require('poolifier/lib/dynamic')
1036 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1039 But you should always prefer just using
1042 const { DynamicThreadPool } = require('poolifier')
1045 #### New type definitions for input data and response
1047 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1048 _This is not a limitation by poolifier but Node.js._
1050 #### Public property replacements
1052 `numWorkers` property is now `numberOfWorkers`
1054 #### Internal (protected) properties and methods renaming
1056 These properties are not intended for end users
1058 - `id` => `nextMessageId`
1060 These methods are not intended for end users
1062 - `_chooseWorker` => `chooseWorker`
1063 - `_newWorker` => `createWorker`
1064 - `_execute` => `internalExecute`
1065 - `_chooseWorker` => `chooseWorker`
1066 - `_checkAlive` => `checkAlive`
1068 - `_runAsync` => `runAsync`
1070 ## [1.1.0] - 2020-05-21
1074 - ThreadWorker support async functions as option
1075 - Various external library patches
1077 ## [1.0.0] - 2020-01-24
1081 - FixedThreadPool implementation
1082 - DynamicThreadPool implementation
1083 - WorkerThread implementation to improve developer experience