docs: generate documentation
[poolifier.git] / CHANGELOG.md
1 # Changelog
2
3 All notable changes to this project will be documented in this file.
4
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).
7
8 ## [Unreleased]
9
10 ## [3.1.2] - 2023-12-17
11
12 ### Fixed
13
14 - Wait for queued tasks to end at worker termination.
15
16 ## [3.1.1] - 2023-12-16
17
18 ### Fixed
19
20 - Fix pool options TS type definition.
21
22 ## [3.1.0] - 2023-12-16
23
24 ### Changed
25
26 - TypeScript breaking change: merge ThreadPoolOptions and ClusterPoolOptions types into PoolOptions type.
27
28 ## [3.0.14] - 2023-12-13
29
30 ### Fixed
31
32 - Fix possible null exception with worker_threads pools.
33
34 ## [3.0.13] - 2023-12-12
35
36 ### Fixed
37
38 - Ensure worker choice strategy wait for worker nodes readiness.
39
40 ### Changed
41
42 - Remove infinite retries support in worker choice strategy to avoid configuration leading to possible infinite recursion or loop.
43
44 ## [3.0.12] - 2023-12-12
45
46 ### Changed
47
48 - Add infinite retries support in worker choice strategy.
49
50 ## [3.0.11] - 2023-12-11
51
52 ### Fixed
53
54 - Ensure pool asynchronous resource properly track tasks execution.
55
56 ## [3.0.10] - 2023-12-08
57
58 ### Changed
59
60 - Add a fastpath when tasks stealing or redistribution is impossible.
61
62 ## [3.0.9] - 2023-11-26
63
64 ### Fixed
65
66 - Remove all pool events listener at pool destroying.
67 - Remove all worker node events listener at worker node destroying.
68 - Fix worker node event emitter listeners handling memory leak at pool options runtime change.
69
70 ## [3.0.8] - 2023-11-25
71
72 ### Fixed
73
74 - Ensure continuous tasks stealing on idle start at worker node idling.
75
76 ## [3.0.7] - 2023-11-24
77
78 ### Changed
79
80 - Make continuous tasks stealing start at worker node idling.
81
82 ## [3.0.6] - 2023-11-24
83
84 ### Fixed
85
86 - Ensure pool statuses are checked at initialization, `start()` or `destroy()`.
87 - Ensure pool `ready` event can be emitted after several `start()/destroy()` cycles.
88
89 ## [3.0.5] - 2023-10-27
90
91 ### Fixed
92
93 - Ensure pool `ready` event can be emitted only once.
94
95 ## [3.0.4] - 2023-10-20
96
97 ### Changed
98
99 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
100 - Use builtin retry mechanism in worker choice strategies instead of custom one.
101
102 ## [3.0.3] - 2023-10-19
103
104 ### Fixed
105
106 - Avoid null exception at sending message to worker.
107 - Avoid null exception at checking worker node readiness.
108
109 ## [3.0.2] - 2023-10-17
110
111 ### Fixed
112
113 - 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).
114
115 ## [3.0.1] - 2023-10-16
116
117 ### Fixed
118
119 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
120
121 ### Changed
122
123 - Switch the worker node eventing code to `EventTarget` API.
124
125 ## [3.0.0] - 2023-10-08
126
127 ### Changed
128
129 - Remove Node.js 16.x.x (EOL) support.
130
131 ## [2.7.5] - 2023-10-03
132
133 ### Changed
134
135 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
136
137 ## [2.7.4] - 2023-09-25
138
139 ### Fixed
140
141 - Fix source maps (bundler issue).
142
143 ## [2.7.3] - 2023-09-24
144
145 ### Changed
146
147 - Convert pool event emitter to event emitter async resource.
148
149 ## [2.7.2] - 2023-09-23
150
151 ### Changed
152
153 - Add source maps to npm package to ease debugging.
154
155 ### Added
156
157 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
158
159 ## [2.7.1] - 2023-09-20
160
161 ### Fixed
162
163 - Ensure worker message listener used one time are removed after usage.
164
165 ## [2.7.0] - 2023-09-19
166
167 ### Fixed
168
169 - Fix task stealing related tasks queue options handling at runtime.
170
171 ### Changed
172
173 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
174
175 ### Added
176
177 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
178 - Stricter worker constructor arguments validation.
179
180 ## [2.6.45] - 2023-09-17
181
182 ### Changed
183
184 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
185
186 ### Added
187
188 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
189 - Add `start()` method to pool API to start the minimum number of workers.
190 - 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.
191 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
192
193 ## [2.6.44] - 2023-09-08
194
195 ### Fixed
196
197 - Use a dedicated PAT to publish on GitHub packages registry.
198
199 ### Added
200
201 - Publish on GitHub packages registry on release.
202
203 ### Changed
204
205 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
206
207 ## [2.6.43] - 2023-09-08
208
209 ### Added
210
211 - Publish on GitHub packages registry on release.
212
213 ### Changed
214
215 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
216
217 ## [2.6.42] - 2023-09-06
218
219 ### Changed
220
221 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
222
223 ## [2.6.41] - 2023-09-03
224
225 ### Changed
226
227 - Optimize worker choice strategies implementation.
228
229 ## [2.6.40] - 2023-09-01
230
231 ### Fixed
232
233 - Do not pre-choose in WRR worker choice strategy to avoid bias.
234 - Avoid array out of bound in worker choice strategies after worker node removal.
235
236 ## [2.6.39] - 2023-08-30
237
238 ### Fixed
239
240 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
241
242 ## [2.6.38] - 2023-08-30
243
244 ### Added
245
246 - Bundle typescript types declaration into one file.
247
248 ### Changed
249
250 - Improve interleaved weighted round robin worker choice strategy implementation.
251
252 ## [2.6.37] - 2023-08-28
253
254 ### Fixed
255
256 - Ensure unused worker usage statistics are deleted at runtime.
257
258 ### Changed
259
260 - Rename worker choice strategy options `choiceRetries` to `retries`.
261 - Avoid unnecessary branching in worker choice strategies.
262
263 ## [2.6.36] - 2023-08-27
264
265 ### Fixed
266
267 - Fix pool `execute()` arguments check.
268
269 ### Changed
270
271 - Make continuous tasks stealing algorithm less aggressive.
272 - Fine tune tasks stealing algorithm under back pressure.
273
274 ## [2.6.35] - 2023-08-25
275
276 ### Fixed
277
278 - Don't account worker usage statistics for tasks that have failed.
279 - Fix pool information runtime and wait time median computation.
280
281 ### Changed
282
283 - Update simple moving average implementation to use a circular buffer.
284 - Update simple moving median implementation to use a circular buffer.
285 - Account for stolen tasks in worker usage statistics and pool information.
286
287 ### Added
288
289 - Continuous tasks stealing algorithm.
290
291 ## [2.6.34] - 2023-08-24
292
293 ### Fixes
294
295 - Avoid cascading tasks stealing under back pressure.
296
297 ### Changed
298
299 - Add fastpath to queued tasks rescheduling.
300
301 ## [2.6.33] - 2023-08-24
302
303 ### Fixed
304
305 - Fix queued tasks rescheduling.
306
307 ### Changed
308
309 - Rename tasks queue options `queueMaxSize` to `size`.
310
311 ### Added
312
313 - Task stealing scheduling algorithm if tasks queueing is enabled.
314
315 ## [2.6.32] - 2023-08-23
316
317 ### Fixed
318
319 - Ensure no task can be executed when the pool is destroyed.
320
321 ### Added
322
323 - Add `queueMaxSize` option to tasks queue options.
324 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
325 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
326
327 ## [2.6.31] - 2023-08-20
328
329 ### Fixed
330
331 - Fix worker choice strategy retries mechanism in some edge cases.
332
333 ### Changed
334
335 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
336 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
337
338 ## [2.6.30] - 2023-08-19
339
340 ### Fixed
341
342 - Ensure pool event `backPressure` is emitted.
343 - Ensure pool event `full` is emitted only once.
344 - Ensure worker node cannot be instantiated without proper arguments.
345
346 ## [2.6.29] - 2023-08-18
347
348 ### Fixed
349
350 - Fix race condition between readiness and task functions worker message handling at startup.
351 - Fix duplicate task function worker usage statistics computation per task function.
352 - Update task function worker usage statistics if and only if there's at least two different task functions.
353 - Fix race condition at task function worker usage executing task computation leading to negative value.
354
355 ### Added
356
357 - 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).
358 - Use back pressure detection in worker choice strategies.
359 - Add worker choice strategies retries mechanism if no worker is eligible.
360
361 ## [2.6.28] - 2023-08-16
362
363 ### Fixed
364
365 - Ensure pool workers are properly initialized.
366
367 ### Added
368
369 - HTTP server pool examples: express-cluster, express-hybrid.
370
371 ### Changed
372
373 - Remove now useless branching in worker hot code path.
374
375 ## [2.6.27] - 2023-08-15
376
377 ### Fixed
378
379 - Add `KillHandler` type definition to exported types.
380
381 ### Added
382
383 - Add `destroy` event to pool API.
384
385 ## [2.6.26] - 2023-08-15
386
387 ### Added
388
389 - Add kill handler to worker options allowing to execute custom code when worker is killed.
390 - Add `listTaskFunctions()` method to pool API.
391 - SMTP client pool example: nodemailer.
392
393 ## [2.6.25] - 2023-08-13
394
395 ### Added
396
397 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
398 - WebSocket server pool examples: ws-cluster, ws-hybrid.
399
400 ## [2.6.24] - 2023-08-12
401
402 ### Added
403
404 - Add array of transferable objects to the `execute()` method arguments.
405 - WebSocket server pool examples: ws-worker_threads.
406
407 ## [2.6.23] - 2023-08-11
408
409 ### Fixed
410
411 - 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.
412
413 ### Added
414
415 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
416 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
417
418 ## [2.6.22] - 2023-08-10
419
420 ### Fixed
421
422 - Add missing `types` field to package.json `exports`.
423
424 ### Changed
425
426 - Structure markdown documentation (PR #811).
427
428 ## [2.6.21] - 2023-08-03
429
430 ### Changed
431
432 - Improve code documentation.
433 - Code refactoring and cleanup for better maintainability and readability.
434
435 ## [2.6.20] - 2023-07-21
436
437 ### Fixed
438
439 - Fix queued tasks redistribution on error task execution starvation.
440 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
441
442 ### Changed
443
444 - Drastically reduce lookups by worker in the worker nodes.
445
446 ## [2.6.19] - 2023-07-20
447
448 ### Added
449
450 - Dedicated internal communication channel for worker_threads pools.
451
452 ## [2.6.18] - 2023-07-19
453
454 ### Changed
455
456 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
457
458 ## [2.6.17] - 2023-07-16
459
460 ### Added
461
462 - Add `listTaskFunctions()` method to worker API.
463
464 ## [2.6.16] - 2023-07-12
465
466 ### Fixed
467
468 - Fix pool startup detection.
469 - Fix worker task functions handling.
470
471 ## [2.6.15] - 2023-07-11
472
473 ### Added
474
475 - Take into account worker node readiness in worker choice strategies.
476
477 ## [2.6.14] - 2023-07-10
478
479 ### Fixed
480
481 - Fix task function statistics tracking.
482
483 ## [2.6.13] - 2023-07-10
484
485 ### Added
486
487 - Add per task function statistics tracking.
488 - Add public methods to manipulate the worker task functions at runtime.
489
490 ## [2.6.12] - 2023-07-09
491
492 ### Fixed
493
494 - Workaround import issue with `node:os` module in node 16.x.x.
495
496 ## [2.6.11] - 2023-07-09
497
498 ### Fixed
499
500 - Fix pool readiness semantic.
501
502 ## [2.6.10] - 2023-07-08
503
504 ### Fixed
505
506 - Ensure workers are not recreated on error at pool startup.
507
508 ### Added
509
510 - Add `ready` and `strategy` fields to pool information.
511 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
512 - Add dynamic pool sizing checks.
513
514 ## [2.6.9] - 2023-07-07
515
516 ### Fixed
517
518 - Recreate the right worker type on uncaught exception.
519
520 ### Added
521
522 - Add minimum and maximum to internal measurement statistics.
523 - Add `runTime` and `waitTime` to pool information.
524 - Check worker inactive time only on dynamic worker.
525
526 ## [2.6.8] - 2023-07-03
527
528 ### Fixed
529
530 - Brown paper bag release to fix version handling in pool information.
531
532 ## [2.6.7] - 2023-07-03
533
534 ### Fixed
535
536 - Ensure worker queued tasks at error are reassigned to other pool workers.
537
538 ### Added
539
540 - Add pool `utilization` ratio to pool information.
541 - Add `version` to pool information.
542 - Add worker information to worker nodes.
543
544 ## [2.6.6] - 2023-07-01
545
546 ### Added
547
548 - Add safe helper `availableParallelism()` to help sizing the pool.
549
550 ### Fixed
551
552 - Ensure message handler is only registered in worker.
553
554 ## [2.6.5] - 2023-06-27
555
556 ### Known issues
557
558 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
559
560 ### Fixed
561
562 - Artificial version bump to 2.6.5 to workaround publication issue.
563 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
564 - Ensure pool event is emitted before task error promise rejection.
565 - Fix queued tasks count computation.
566
567 ### Removed
568
569 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
570
571 ## [2.6.4] - 2023-06-27
572
573 ### Known issues
574
575 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
576
577 ### Fixed
578
579 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
580 - Ensure pool event is emitted before task error promise rejection.
581 - Fix queued tasks count computation.
582
583 ### Removed
584
585 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
586
587 ## [2.6.3] - 2023-06-19
588
589 ### Fixed
590
591 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
592 - Update strategies internals after statistics computation.
593
594 ### Changed
595
596 - Optimize O(1) queue implementation.
597
598 ## [2.6.2] - 2023-06-12
599
600 ### Fixed
601
602 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
603
604 ## [2.6.1] - 2023-06-10
605
606 ### Added
607
608 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
609
610 ### Fixed
611
612 - Fix average statistics computation: ensure failed tasks are not accounted.
613
614 ## [2.6.0] - 2023-06-09
615
616 ### Added
617
618 - Add `LEAST_ELU` worker choice strategy (experimental).
619 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
620
621 ### Changed
622
623 - Refactor pool worker node usage internals.
624 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
625 - Breaking change: pool information `info` property object fields have been renamed.
626
627 ### Fixed
628
629 - Fix wait time accounting.
630 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
631 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
632
633 ## [2.5.4] - 2023-06-07
634
635 ### Added
636
637 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
638
639 ### Changed
640
641 - Compute statistics at the worker level only if needed.
642 - Add `worker_threads` options to thread pool options.
643
644 ### Fixed
645
646 - Make the `LEAST_BUSY` strategy only relies on task runtime.
647
648 ## [2.5.3] - 2023-06-04
649
650 ### Changed
651
652 - Refine pool information content.
653 - Limit pool internals public exposure.
654
655 ## [2.5.2] - 2023-06-02
656
657 ### Added
658
659 - Add `taskError` pool event for task execution error.
660 - Add pool information `info` property to pool.
661 - Emit pool information on `busy` and `full` pool events.
662
663 ## [2.5.1] - 2023-06-01
664
665 ### Added
666
667 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
668 - Add `error` pool event for uncaught worker error.
669
670 ## [2.5.0] - 2023-05-31
671
672 ### Added
673
674 - Switch pool event emitter to `EventEmitterAsyncResource`.
675 - Add tasks wait time accounting in per worker tasks usage.
676 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
677
678 ### Changed
679
680 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
681
682 ## [2.4.14] - 2023-05-09
683
684 ### Fixed
685
686 - Ensure no undefined task runtime can land in the tasks history.
687 - Fix median computation implementation once again.
688
689 ### Added
690
691 - Unit tests for median and queue implementations.
692
693 ## [2.4.13] - 2023-05-08
694
695 ### Fixed
696
697 - Fix worker choice strategy options validation.
698 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
699
700 ## [2.4.12] - 2023-05-06
701
702 ### Added
703
704 - Support multiple task functions per worker.
705 - Add custom worker weights support to worker choice strategies options.
706
707 ### Changed
708
709 - Use O(1) queue implementation for tasks queueing.
710
711 ### Fixed
712
713 - Fix median computation implementation.
714 - Fix fair share worker choice strategy internals update.
715
716 ## [2.4.11] - 2023-04-23
717
718 ### Changed
719
720 - Optimize free worker finding in worker choice strategies.
721
722 ## [2.4.10] - 2023-04-15
723
724 ### Fixed
725
726 - Fix typescript type definition for task function: ensure the input data is optional.
727 - Fix typescript type definition for pool execute(): ensure the input data is optional.
728
729 ## [2.4.9] - 2023-04-15
730
731 ### Added
732
733 - Add tasks queue enablement runtime setter to pool.
734 - Add tasks queue options runtime setter to pool.
735 - Add worker choice strategy options runtime setter to pool.
736
737 ### Changed
738
739 - Remove the tasks queuing experimental status.
740
741 ### Fixed
742
743 - Fix task function type definition and validation.
744 - Fix worker choice strategy options handling.
745
746 ## [2.4.8] - 2023-04-12
747
748 ### Fixed
749
750 - Fix message between main worker and worker type definition for tasks.
751 - Fix code documentation.
752
753 ## [2.4.7] - 2023-04-11
754
755 ### Added
756
757 - Add worker tasks queue options to pool options.
758
759 ### Fixed
760
761 - Fix missing documentation.
762
763 ## [2.4.6] - 2023-04-10
764
765 ### Fixed
766
767 - Ensure one task at a time is executed per worker with tasks queueing enabled.
768 - Properly count worker executing tasks with tasks queueing enabled.
769
770 ## [2.4.5] - 2023-04-09
771
772 ### Added
773
774 - Use monotonic high resolution timer for worker tasks runtime.
775 - Add worker tasks median runtime to statistics.
776 - Add worker tasks queue (experimental).
777
778 ## [2.4.4] - 2023-04-07
779
780 ### Added
781
782 - Add `PoolEvents` enumeration and `PoolEvent` type.
783
784 ### Fixed
785
786 - Destroy worker only on alive check.
787
788 ## [2.4.3] - 2023-04-07
789
790 ### Fixed
791
792 - Fix typedoc generation with inheritance.
793
794 ## [2.4.2] - 2023-04-06
795
796 ### Added
797
798 - Add `full` event to dynamic pool.
799 - Keep worker choice strategy in memory for conditional reuse.
800
801 ### Fixed
802
803 - Fix possible negative worker key at worker removal in worker choice strategies.
804
805 ## [2.4.1] - 2023-04-05
806
807 ### Changed
808
809 - Optimize worker choice strategy for dynamic pool.
810
811 ### Fixed
812
813 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
814
815 ## [2.4.0] - 2023-04-04
816
817 ### Added
818
819 - Add `LESS_BUSY` worker choice strategy.
820
821 ### Changed
822
823 - Optimize worker storage in pool.
824 - Optimize worker alive status check.
825 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
826 - Optimize `LESS_USED` worker choice strategy.
827 - Update benchmark versus external threads pools.
828 - Optimize tasks usage statistics requirements for worker choice strategy.
829
830 ### Fixed
831
832 - Ensure trimmable characters are checked at pool initialization.
833 - Fix message id integer overflow.
834 - Fix pool worker removal in worker choice strategy internals.
835 - Fix package publication with pnpm.
836
837 ## [2.4.0-3] - 2023-04-04
838
839 ### Added
840
841 - Add `LESS_BUSY` worker choice strategy.
842
843 ### Changed
844
845 - Optimize worker storage in pool.
846 - Optimize worker alive status check.
847 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
848 - Optimize `LESS_USED` worker choice strategy.
849 - Update benchmark versus external threads pools.
850
851 ### Fixed
852
853 - Ensure trimmable characters are checked at pool initialization.
854 - Fix message id integer overflow.
855 - Fix pool worker removal in worker choice strategy internals.
856 - Fix package publication with pnpm.
857
858 ## [2.4.0-2] - 2023-04-03
859
860 ### Added
861
862 - Add `LESS_BUSY` worker choice strategy.
863
864 ### Changed
865
866 - Optimize worker storage in pool.
867 - Optimize worker alive status check.
868 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
869 - Optimize `LESS_USED` worker choice strategy.
870
871 ### Fixed
872
873 - Ensure trimmable characters are checked at pool initialization.
874 - Fix message id integer overflow.
875 - Fix pool worker removal in worker choice strategy internals.
876 - Fix package publication with pnpm.
877
878 ## [2.4.0-1] - 2023-04-03
879
880 ### Added
881
882 - Add `LESS_BUSY` worker choice strategy.
883
884 ### Changed
885
886 - Optimize worker storage in pool.
887 - Optimize worker alive status check.
888 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
889 - Optimize `LESS_USED` worker choice strategy.
890
891 ### Fixed
892
893 - Ensure trimmable characters are checked at pool initialization.
894 - Fix message id integer overflow.
895 - Fix pool worker removal in worker choice strategy internals.
896
897 ## [2.4.0-0] - 2023-04-03
898
899 ### Added
900
901 - Add `LESS_BUSY` worker choice strategy.
902
903 ### Changed
904
905 - Optimize worker storage in pool.
906 - Optimize worker alive status check.
907 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
908 - Optimize `LESS_USED` worker choice strategy.
909
910 ### Fixed
911
912 - Ensure trimmable characters are checked at pool initialization.
913 - Fix message id integer overflow.
914 - Fix pool worker removal in worker choice strategy internals.
915
916 ## [2.3.10] - 2023-03-18
917
918 ### Fixed
919
920 - Fix package.json `exports` syntax for ESM and CommonJS.
921
922 ### Changed
923
924 - Permit SemVer pre-release publication.
925
926 ## [2.3.10-2] - 2023-03-18
927
928 ### Fixed
929
930 - Fix package.json `exports` syntax for ESM and CommonJS.
931
932 ## [2.3.10-1] - 2023-03-18
933
934 ### Changed
935
936 - Permit SemVer pre-release publication.
937
938 ## [2.3.10-0] - 2023-03-18
939
940 ### Fixed
941
942 - Fix package.json `exports` syntax for ESM and CommonJS.
943
944 ## [2.3.9] - 2023-03-18
945
946 ### Changed
947
948 - Introduce ESM module support along with CommonJS one.
949
950 ### Fixed
951
952 - Fix brown paper bag bug referencing the same object literal.
953
954 ## [2.3.8] - 2023-03-18
955
956 ### Changed
957
958 - Switch internal benchmarking code to benny.
959 - Switch to TypeScript 5.x.x.
960 - Switch rollup bundler plugins to core ones.
961 - Switch to TSDoc syntax.
962 - Enforce conventional commits.
963
964 ### Fixed
965
966 - Fix random integer generator.
967 - Fix worker choice strategy pool type identification at initialization.
968
969 ## [2.3.7] - 2022-10-23
970
971 ### Changed
972
973 - Switch to open collective FOSS project funding platform.
974 - Switch to ts-standard linter configuration on TypeScript code.
975
976 ### Fixed
977
978 - Fixed missing async on pool execute method.
979 - Fixed typing in TypeScript example.
980 - Fixed types in unit tests.
981
982 ## [2.3.6] - 2022-10-22
983
984 ### Changed
985
986 - Cleanup pool attributes and methods.
987 - Refine error types thrown.
988
989 ### Fixed
990
991 - Fix continuous integration build on windows.
992 - Fix code coverage reporting by using c8 instead of nyc.
993
994 ## [2.3.5] - 2022-10-21
995
996 ### Changed
997
998 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
999 - Optimize tasks usage lookup implementation.
1000
1001 ### Fixed
1002
1003 - Fix missed pool event emitter type export.
1004 - Fix typedoc documentation generation.
1005
1006 ## [2.3.4] - 2022-10-17
1007
1008 ### Added
1009
1010 - Fully automate release process with release-it.
1011
1012 ### Changed
1013
1014 - Optimize fair share task scheduling algorithm implementation.
1015 - Update benchmark versus external pools results with latest version.
1016
1017 ## [2.3.3] - 2022-10-15
1018
1019 ### Added
1020
1021 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
1022
1023 ## [2.3.2] - 2022-10-14
1024
1025 ### Changed
1026
1027 - Optimize fair share worker selection strategy implementation.
1028
1029 ### Fixed
1030
1031 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
1032
1033 ## [2.3.1] - 2022-10-13
1034
1035 ### Added
1036
1037 - Pool worker choice strategies:
1038 - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
1039 - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
1040
1041 ## [2.2.2] - 2022-10-09
1042
1043 ### Fixed
1044
1045 - Fixed `README.md` file.
1046
1047 ## [2.2.1] - 2022-10-08
1048
1049 ### Added
1050
1051 - Dynamic worker choice strategy change at runtime.
1052
1053 ## [2.2.0] - 2022-01-05
1054
1055 ### Breaking Changes
1056
1057 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
1058
1059 ## [2.1.0] - 2021-08-29
1060
1061 ### Added
1062
1063 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
1064
1065 ### Breaking Changes
1066
1067 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
1068 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
1069 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
1070 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
1071
1072 ## [2.0.2] - 2021-05-12
1073
1074 ### Bug fixes
1075
1076 - Fix `busy` event emission on fixed pool type
1077
1078 ## [2.0.1] - 2021-03-16
1079
1080 ### Bug fixes
1081
1082 - Check if pool options are properly set.
1083 - `busy` event is emitted on all pool types.
1084
1085 ## [2.0.0] - 2021-03-01
1086
1087 ### Bug fixes
1088
1089 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1090
1091 ### Breaking Changes
1092
1093 - `FullPool` event is now renamed to `busy`.
1094 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1095 _Find more details on our JSDoc._
1096
1097 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1098
1099 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1100
1101 ### Pool options types declaration merge
1102
1103 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1104
1105 #### New `export` strategy
1106
1107 ```js
1108 // Before
1109 const DynamicThreadPool = require('poolifier/lib/dynamic')
1110 // After
1111 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1112 ```
1113
1114 But you should always prefer just using
1115
1116 ```js
1117 const { DynamicThreadPool } = require('poolifier')
1118 ```
1119
1120 #### New type definitions for input data and response
1121
1122 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1123 _This is not a limitation by poolifier but Node.js._
1124
1125 #### Public property replacements
1126
1127 `numWorkers` property is now `numberOfWorkers`
1128
1129 #### Internal (protected) properties and methods renaming
1130
1131 These properties are not intended for end users
1132
1133 - `id` => `nextMessageId`
1134
1135 These methods are not intended for end users
1136
1137 - `_chooseWorker` => `chooseWorker`
1138 - `_newWorker` => `createWorker`
1139 - `_execute` => `internalExecute`
1140 - `_chooseWorker` => `chooseWorker`
1141 - `_checkAlive` => `checkAlive`
1142 - `_run` => `run`
1143 - `_runAsync` => `runAsync`
1144
1145 ## [1.1.0] - 2020-05-21
1146
1147 ### Added
1148
1149 - ThreadWorker support async functions as option
1150 - Various external library patches
1151
1152 ## [1.0.0] - 2020-01-24
1153
1154 ### Added
1155
1156 - FixedThreadPool implementation
1157 - DynamicThreadPool implementation
1158 - WorkerThread implementation to improve developer experience