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()`.
13 - Sort IWRR worker choice strategy round weights in descending order.
15 ## [3.0.5] - 2023-10-27
19 - Ensure pool ready event can be emitted only once.
21 ## [3.0.4] - 2023-10-20
25 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
26 - Use builtin retry mechanism in worker choice strategies instead of custom one.
28 ## [3.0.3] - 2023-10-19
32 - Avoid null exception at sending message to worker.
33 - Avoid null exception at checking worker node readiness.
35 ## [3.0.2] - 2023-10-17
39 - 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).
41 ## [3.0.1] - 2023-10-16
45 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
49 - Switch the worker node eventing code to `EventTarget` API.
51 ## [3.0.0] - 2023-10-08
55 - Remove Node.js 16.x.x (EOL) support.
57 ## [2.7.5] - 2023-10-03
61 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
63 ## [2.7.4] - 2023-09-25
67 - Fix source maps (bundler issue).
69 ## [2.7.3] - 2023-09-24
73 - Convert pool event emitter to event emitter async resource.
75 ## [2.7.2] - 2023-09-23
79 - Add source maps to npm package to ease debugging.
83 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
85 ## [2.7.1] - 2023-09-20
89 - Ensure worker message listener used one time are removed after usage.
91 ## [2.7.0] - 2023-09-19
95 - Fix task stealing related tasks queue options handling at runtime.
99 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
103 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
104 - Stricter worker constructor arguments validation.
106 ## [2.6.45] - 2023-09-17
110 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
114 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
115 - Add `start()` method to pool API to start the minimum number of workers.
116 - 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.
117 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
119 ## [2.6.44] - 2023-09-08
123 - Use a dedicated PAT to publish on GitHub packages registry.
127 - Publish on GitHub packages registry on release.
131 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
133 ## [2.6.43] - 2023-09-08
137 - Publish on GitHub packages registry on release.
141 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
143 ## [2.6.42] - 2023-09-06
147 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
149 ## [2.6.41] - 2023-09-03
153 - Optimize worker choice strategies implementation.
155 ## [2.6.40] - 2023-09-01
159 - Do not pre-choose in WRR worker choice strategy to avoid bias.
160 - Avoid array out of bound in worker choice strategies after worker node removal.
162 ## [2.6.39] - 2023-08-30
166 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
168 ## [2.6.38] - 2023-08-30
172 - Bundle typescript types declaration into one file.
176 - Improve interleaved weighted round robin worker choice strategy implementation.
178 ## [2.6.37] - 2023-08-28
182 - Ensure unused worker usage statistics are deleted at runtime.
186 - Rename worker choice strategy options `choiceRetries` to `retries`.
187 - Avoid unnecessary branching in worker choice strategies.
189 ## [2.6.36] - 2023-08-27
193 - Fix pool `execute()` arguments check.
197 - Make continuous tasks stealing algorithm less aggressive.
198 - Fine tune tasks stealing algorithm under back pressure.
200 ## [2.6.35] - 2023-08-25
204 - Don't account worker usage statistics for tasks that have failed.
205 - Fix pool information runtime and wait time median computation.
209 - Update simple moving average implementation to use a circular buffer.
210 - Update simple moving median implementation to use a circular buffer.
211 - Account for stolen tasks in worker usage statistics and pool information.
215 - Continuous tasks stealing algorithm.
217 ## [2.6.34] - 2023-08-24
221 - Avoid cascading tasks stealing under back pressure.
225 - Add fastpath to queued tasks rescheduling.
227 ## [2.6.33] - 2023-08-24
231 - Fix queued tasks rescheduling.
235 - Rename tasks queue options `queueMaxSize` to `size`.
239 - Task stealing scheduling algorithm if tasks queueing is enabled.
241 ## [2.6.32] - 2023-08-23
245 - Ensure no task can be executed when the pool is destroyed.
249 - Add `queueMaxSize` option to tasks queue options.
250 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
251 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
253 ## [2.6.31] - 2023-08-20
257 - Fix worker choice strategy retries mechanism in some edge cases.
261 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
262 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
264 ## [2.6.30] - 2023-08-19
268 - Ensure pool event `backPressure` is emitted.
269 - Ensure pool event `full` is emitted only once.
270 - Ensure worker node cannot be instantiated without proper arguments.
272 ## [2.6.29] - 2023-08-18
276 - Fix race condition between ready and task functions worker message handling at startup.
277 - Fix duplicate task function worker usage statistics computation per task function.
278 - Update task function worker usage statistics if and only if there's at least two different task functions.
279 - Fix race condition at task function worker usage executing task computation leading to negative value.
283 - 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).
284 - Use back pressure detection in worker choice strategies.
285 - Add worker choice strategies retries mechanism if no worker is eligible.
287 ## [2.6.28] - 2023-08-16
291 - Ensure pool workers are properly initialized.
295 - HTTP server pool examples: express-cluster, express-hybrid.
299 - Remove now useless branching in worker hot code path.
301 ## [2.6.27] - 2023-08-15
305 - Add `KillHandler` type definition to exported types.
309 - Add `destroy` event to pool API.
311 ## [2.6.26] - 2023-08-15
315 - Add kill handler to worker options allowing to execute custom code when worker is killed.
316 - Add `listTaskFunctions()` method to pool API.
317 - SMTP client pool example: nodemailer.
319 ## [2.6.25] - 2023-08-13
323 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
324 - WebSocket server pool examples: ws-cluster, ws-hybrid.
326 ## [2.6.24] - 2023-08-12
330 - Add array of transferable objects to the `execute()` method arguments.
331 - WebSocket server pool examples: ws-worker_threads.
333 ## [2.6.23] - 2023-08-11
337 - 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.
341 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
342 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
344 ## [2.6.22] - 2023-08-10
348 - Add missing `types` field to package.json `exports`.
352 - Structure markdown documentation (PR #811).
354 ## [2.6.21] - 2023-08-03
358 - Improve code documentation.
359 - Code refactoring and cleanup for better maintainability and readability.
361 ## [2.6.20] - 2023-07-21
365 - Fix queued tasks redistribution on error task execution starvation.
366 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
370 - Drastically reduce lookups by worker in the worker nodes.
372 ## [2.6.19] - 2023-07-20
376 - Dedicated internal communication channel for worker_threads pools.
378 ## [2.6.18] - 2023-07-19
382 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
384 ## [2.6.17] - 2023-07-16
388 - Add `listTaskFunctions()` method to worker API.
390 ## [2.6.16] - 2023-07-12
394 - Fix pool startup detection.
395 - Fix worker task functions handling.
397 ## [2.6.15] - 2023-07-11
401 - Take into account worker node readiness in worker choice strategies.
403 ## [2.6.14] - 2023-07-10
407 - Fix task function statistics tracking.
409 ## [2.6.13] - 2023-07-10
413 - Add per task function statistics tracking.
414 - Add public methods to manipulate the worker task functions at runtime.
416 ## [2.6.12] - 2023-07-09
420 - Workaround import issue with `node:os` module in node 16.x.x.
422 ## [2.6.11] - 2023-07-09
426 - Fix pool readiness semantic.
428 ## [2.6.10] - 2023-07-08
432 - Ensure workers are not recreated on error at pool startup.
436 - Add `ready` and `strategy` fields to pool information.
437 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
438 - Add dynamic pool sizing checks.
440 ## [2.6.9] - 2023-07-07
444 - Recreate the right worker type on uncaught exception.
448 - Add minimum and maximum to internal measurement statistics.
449 - Add `runTime` and `waitTime` to pool information.
450 - Check worker inactive time only on dynamic worker.
452 ## [2.6.8] - 2023-07-03
456 - Brown paper bag release to fix version handling in pool information.
458 ## [2.6.7] - 2023-07-03
462 - Ensure worker queued tasks at error are reassigned to other pool workers.
466 - Add pool `utilization` ratio to pool information.
467 - Add `version` to pool information.
468 - Add worker information to worker nodes.
470 ## [2.6.6] - 2023-07-01
474 - Add safe helper `availableParallelism()` to help sizing the pool.
478 - Ensure message handler is only registered in worker.
480 ## [2.6.5] - 2023-06-27
484 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
488 - Artificial version bump to 2.6.5 to workaround publication issue.
489 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
490 - Ensure pool event is emitted before task error promise rejection.
491 - Fix queued tasks count computation.
495 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
497 ## [2.6.4] - 2023-06-27
501 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
505 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
506 - Ensure pool event is emitted before task error promise rejection.
507 - Fix queued tasks count computation.
511 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
513 ## [2.6.3] - 2023-06-19
517 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
518 - Update strategies internals after statistics computation.
522 - Optimize O(1) queue implementation.
524 ## [2.6.2] - 2023-06-12
528 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
530 ## [2.6.1] - 2023-06-10
534 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
538 - Fix average statistics computation: ensure failed tasks are not accounted.
540 ## [2.6.0] - 2023-06-09
544 - Add `LEAST_ELU` worker choice strategy (experimental).
545 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
549 - Refactor pool worker node usage internals.
550 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
551 - Breaking change: pool information `info` property object fields have been renamed.
555 - Fix wait time accounting.
556 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
557 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
559 ## [2.5.4] - 2023-06-07
563 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
567 - Compute statistics at the worker level only if needed.
568 - Add `worker_threads` options to thread pool options.
572 - Make the `LEAST_BUSY` strategy only relies on task runtime.
574 ## [2.5.3] - 2023-06-04
578 - Refine pool information content.
579 - Limit pool internals public exposure.
581 ## [2.5.2] - 2023-06-02
585 - Add `taskError` pool event for task execution error.
586 - Add pool information `info` property to pool.
587 - Emit pool information on `busy` and `full` pool events.
589 ## [2.5.1] - 2023-06-01
593 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
594 - Add `error` pool event for uncaught worker error.
596 ## [2.5.0] - 2023-05-31
600 - Switch pool event emitter to `EventEmitterAsyncResource`.
601 - Add tasks wait time accounting in per worker tasks usage.
602 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
606 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
608 ## [2.4.14] - 2023-05-09
612 - Ensure no undefined task runtime can land in the tasks history.
613 - Fix median computation implementation once again.
617 - Unit tests for median and queue implementations.
619 ## [2.4.13] - 2023-05-08
623 - Fix worker choice strategy options validation.
624 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
626 ## [2.4.12] - 2023-05-06
630 - Support multiple task functions per worker.
631 - Add custom worker weights support to worker choice strategies options.
635 - Use O(1) queue implementation for tasks queueing.
639 - Fix median computation implementation.
640 - Fix fair share worker choice strategy internals update.
642 ## [2.4.11] - 2023-04-23
646 - Optimize free worker finding in worker choice strategies.
648 ## [2.4.10] - 2023-04-15
652 - Fix typescript type definition for task function: ensure the input data is optional.
653 - Fix typescript type definition for pool execute(): ensure the input data is optional.
655 ## [2.4.9] - 2023-04-15
659 - Add tasks queue enablement runtime setter to pool.
660 - Add tasks queue options runtime setter to pool.
661 - Add worker choice strategy options runtime setter to pool.
665 - Remove the tasks queuing experimental status.
669 - Fix task function type definition and validation.
670 - Fix worker choice strategy options handling.
672 ## [2.4.8] - 2023-04-12
676 - Fix message between main worker and worker type definition for tasks.
677 - Fix code documentation.
679 ## [2.4.7] - 2023-04-11
683 - Add worker tasks queue options to pool options.
687 - Fix missing documentation.
689 ## [2.4.6] - 2023-04-10
693 - Ensure one task at a time is executed per worker with tasks queueing enabled.
694 - Properly count worker executing tasks with tasks queueing enabled.
696 ## [2.4.5] - 2023-04-09
700 - Use monotonic high resolution timer for worker tasks runtime.
701 - Add worker tasks median runtime to statistics.
702 - Add worker tasks queue (experimental).
704 ## [2.4.4] - 2023-04-07
708 - Add `PoolEvents` enumeration and `PoolEvent` type.
712 - Destroy worker only on alive check.
714 ## [2.4.3] - 2023-04-07
718 - Fix typedoc generation with inheritance.
720 ## [2.4.2] - 2023-04-06
724 - Add `full` event to dynamic pool.
725 - Keep worker choice strategy in memory for conditional reuse.
729 - Fix possible negative worker key at worker removal in worker choice strategies.
731 ## [2.4.1] - 2023-04-05
735 - Optimize worker choice strategy for dynamic pool.
739 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
741 ## [2.4.0] - 2023-04-04
745 - Add `LESS_BUSY` worker choice strategy.
749 - Optimize worker storage in pool.
750 - Optimize worker alive status check.
751 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
752 - Optimize `LESS_USED` worker choice strategy.
753 - Update benchmark versus external threads pools.
754 - Optimize tasks usage statistics requirements for worker choice strategy.
758 - Ensure trimmable characters are checked at pool initialization.
759 - Fix message id integer overflow.
760 - Fix pool worker removal in worker choice strategy internals.
761 - Fix package publication with pnpm.
763 ## [2.4.0-3] - 2023-04-04
767 - Add `LESS_BUSY` worker choice strategy.
771 - Optimize worker storage in pool.
772 - Optimize worker alive status check.
773 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
774 - Optimize `LESS_USED` worker choice strategy.
775 - Update benchmark versus external threads pools.
779 - Ensure trimmable characters are checked at pool initialization.
780 - Fix message id integer overflow.
781 - Fix pool worker removal in worker choice strategy internals.
782 - Fix package publication with pnpm.
784 ## [2.4.0-2] - 2023-04-03
788 - Add `LESS_BUSY` worker choice strategy.
792 - Optimize worker storage in pool.
793 - Optimize worker alive status check.
794 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
795 - Optimize `LESS_USED` worker choice strategy.
799 - Ensure trimmable characters are checked at pool initialization.
800 - Fix message id integer overflow.
801 - Fix pool worker removal in worker choice strategy internals.
802 - Fix package publication with pnpm.
804 ## [2.4.0-1] - 2023-04-03
808 - Add `LESS_BUSY` worker choice strategy.
812 - Optimize worker storage in pool.
813 - Optimize worker alive status check.
814 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
815 - Optimize `LESS_USED` worker choice strategy.
819 - Ensure trimmable characters are checked at pool initialization.
820 - Fix message id integer overflow.
821 - Fix pool worker removal in worker choice strategy internals.
823 ## [2.4.0-0] - 2023-04-03
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.
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.
842 ## [2.3.10] - 2023-03-18
846 - Fix package.json `exports` syntax for ESM and CommonJS.
850 - Permit SemVer pre-release publication.
852 ## [2.3.10-2] - 2023-03-18
856 - Fix package.json `exports` syntax for ESM and CommonJS.
858 ## [2.3.10-1] - 2023-03-18
862 - Permit SemVer pre-release publication.
864 ## [2.3.10-0] - 2023-03-18
868 - Fix package.json `exports` syntax for ESM and CommonJS.
870 ## [2.3.9] - 2023-03-18
874 - Introduce ESM module support along with CommonJS one.
878 - Fix brown paper bag bug referencing the same object literal.
880 ## [2.3.8] - 2023-03-18
884 - Switch internal benchmarking code to benny.
885 - Switch to TypeScript 5.x.x.
886 - Switch rollup bundler plugins to core ones.
887 - Switch to TSDoc syntax.
888 - Enforce conventional commits.
892 - Fix random integer generator.
893 - Fix worker choice strategy pool type identification at initialization.
895 ## [2.3.7] - 2022-10-23
899 - Switch to open collective FOSS project funding platform.
900 - Switch to ts-standard linter configuration on TypeScript code.
904 - Fixed missing async on pool execute method.
905 - Fixed typing in TypeScript example.
906 - Fixed types in unit tests.
908 ## [2.3.6] - 2022-10-22
912 - Cleanup pool attributes and methods.
913 - Refine error types thrown.
917 - Fix continuous integration build on windows.
918 - Fix code coverage reporting by using c8 instead of nyc.
920 ## [2.3.5] - 2022-10-21
924 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
925 - Optimize tasks usage lookup implementation.
929 - Fix missed pool event emitter type export.
930 - Fix typedoc documentation generation.
932 ## [2.3.4] - 2022-10-17
936 - Fully automate release process with release-it.
940 - Optimize fair share task scheduling algorithm implementation.
941 - Update benchmark versus external pools results with latest version.
943 ## [2.3.3] - 2022-10-15
947 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
949 ## [2.3.2] - 2022-10-14
953 - Optimize fair share worker selection strategy implementation.
957 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
959 ## [2.3.1] - 2022-10-13
963 - Pool worker choice strategies:
964 - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
965 - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
967 ## [2.2.2] - 2022-10-09
971 - Fixed `README.md` file.
973 ## [2.2.1] - 2022-10-08
977 - Dynamic worker choice strategy change at runtime.
979 ## [2.2.0] - 2022-01-05
983 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
985 ## [2.1.0] - 2021-08-29
989 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
993 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
994 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
995 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
996 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
998 ## [2.0.2] - 2021-05-12
1002 - Fix `busy` event emission on fixed pool type
1004 ## [2.0.1] - 2021-03-16
1008 - Check if pool options are properly set.
1009 - `busy` event is emitted on all pool types.
1011 ## [2.0.0] - 2021-03-01
1015 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1017 ### Breaking Changes
1019 - `FullPool` event is now renamed to `busy`.
1020 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1021 _Find more details on our JSDoc._
1023 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1025 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1027 ### Pool options types declaration merge
1029 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1031 #### New `export` strategy
1035 const DynamicThreadPool = require('poolifier/lib/dynamic')
1037 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1040 But you should always prefer just using
1043 const { DynamicThreadPool } = require('poolifier')
1046 #### New type definitions for input data and response
1048 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1049 _This is not a limitation by poolifier but Node.js._
1051 #### Public property replacements
1053 `numWorkers` property is now `numberOfWorkers`
1055 #### Internal (protected) properties and methods renaming
1057 These properties are not intended for end users
1059 - `id` => `nextMessageId`
1061 These methods are not intended for end users
1063 - `_chooseWorker` => `chooseWorker`
1064 - `_newWorker` => `createWorker`
1065 - `_execute` => `internalExecute`
1066 - `_chooseWorker` => `chooseWorker`
1067 - `_checkAlive` => `checkAlive`
1069 - `_runAsync` => `runAsync`
1071 ## [1.1.0] - 2020-05-21
1075 - ThreadWorker support async functions as option
1076 - Various external library patches
1078 ## [1.0.0] - 2020-01-24
1082 - FixedThreadPool implementation
1083 - DynamicThreadPool implementation
1084 - WorkerThread implementation to improve developer experience