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 ### Fixed
  11
  12 - Fix pool destroying with tasks queuing enabled.
  13
  14 ## [3.1.5] - 2023-12-18
  15
  16 ### Added
  17
  18 - Add queued tasks end timeout support to worker node termination.
  19
  20 ## [3.1.4] - 2023-12-18
  21
  22 ### Fixed
  23
  24 - Make more robust the fix for possible null exception at handling task execution response.
  25
  26 ## [3.1.3] - 2023-12-17
  27
  28 ### Fixed
  29
  30 - Fix possible null exception at handling task execution response.
  31
  32 ## [3.1.2] - 2023-12-17
  33
  34 ### Fixed
  35
  36 - Wait for queued tasks to end at worker node termination.
  37
  38 ## [3.1.1] - 2023-12-16
  39
  40 ### Fixed
  41
  42 - Fix pool options TS type definition.
  43
  44 ## [3.1.0] - 2023-12-16
  45
  46 ### Changed
  47
  48 - TypeScript breaking change: merge ThreadPoolOptions and ClusterPoolOptions types into PoolOptions type.
  49
  50 ## [3.0.14] - 2023-12-13
  51
  52 ### Fixed
  53
  54 - Fix possible null exception with worker_threads pools.
  55
  56 ## [3.0.13] - 2023-12-12
  57
  58 ### Fixed
  59
  60 - Ensure worker choice strategy wait for worker nodes readiness.
  61
  62 ### Changed
  63
  64 - Remove infinite retries support in worker choice strategy to avoid configuration leading to possible infinite recursion or loop.
  65
  66 ## [3.0.12] - 2023-12-12
  67
  68 ### Changed
  69
  70 - Add infinite retries support in worker choice strategy.
  71
  72 ## [3.0.11] - 2023-12-11
  73
  74 ### Fixed
  75
  76 - Ensure pool asynchronous resource properly track tasks execution.
  77
  78 ## [3.0.10] - 2023-12-08
  79
  80 ### Changed
  81
  82 - Add a fastpath when tasks stealing or redistribution is impossible.
  83
  84 ## [3.0.9] - 2023-11-26
  85
  86 ### Fixed
  87
  88 - Remove all pool events listener at pool destroying.
  89 - Remove all worker node events listener at worker node destroying.
  90 - Fix worker node event emitter listeners handling memory leak at pool options runtime change.
  91
  92 ## [3.0.8] - 2023-11-25
  93
  94 ### Fixed
  95
  96 - Ensure continuous tasks stealing on idle start at worker node idling.
  97
  98 ## [3.0.7] - 2023-11-24
  99
 100 ### Changed
 101
 102 - Make continuous tasks stealing start at worker node idling.
 103
 104 ## [3.0.6] - 2023-11-24
 105
 106 ### Fixed
 107
 108 - Ensure pool statuses are checked at initialization, `start()` or `destroy()`.
 109 - Ensure pool `ready` event can be emitted after several `start()/destroy()` cycles.
 110
 111 ## [3.0.5] - 2023-10-27
 112
 113 ### Fixed
 114
 115 - Ensure pool `ready` event can be emitted only once.
 116
 117 ## [3.0.4] - 2023-10-20
 118
 119 ### Changed
 120
 121 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
 122 - Use builtin retry mechanism in worker choice strategies instead of custom one.
 123
 124 ## [3.0.3] - 2023-10-19
 125
 126 ### Fixed
 127
 128 - Avoid null exception at sending message to worker.
 129 - Avoid null exception at checking worker node readiness.
 130
 131 ## [3.0.2] - 2023-10-17
 132
 133 ### Fixed
 134
 135 - 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).
 136
 137 ## [3.0.1] - 2023-10-16
 138
 139 ### Fixed
 140
 141 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
 142
 143 ### Changed
 144
 145 - Switch the worker node eventing code to `EventTarget` API.
 146
 147 ## [3.0.0] - 2023-10-08
 148
 149 ### Changed
 150
 151 - Remove Node.js 16.x.x (EOL) support.
 152
 153 ## [2.7.5] - 2023-10-03
 154
 155 ### Changed
 156
 157 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
 158
 159 ## [2.7.4] - 2023-09-25
 160
 161 ### Fixed
 162
 163 - Fix source maps (bundler issue).
 164
 165 ## [2.7.3] - 2023-09-24
 166
 167 ### Changed
 168
 169 - Convert pool event emitter to event emitter async resource.
 170
 171 ## [2.7.2] - 2023-09-23
 172
 173 ### Changed
 174
 175 - Add source maps to npm package to ease debugging.
 176
 177 ### Added
 178
 179 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
 180
 181 ## [2.7.1] - 2023-09-20
 182
 183 ### Fixed
 184
 185 - Ensure worker message listener used one time are removed after usage.
 186
 187 ## [2.7.0] - 2023-09-19
 188
 189 ### Fixed
 190
 191 - Fix task stealing related tasks queue options handling at runtime.
 192
 193 ### Changed
 194
 195 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
 196
 197 ### Added
 198
 199 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
 200 - Stricter worker constructor arguments validation.
 201
 202 ## [2.6.45] - 2023-09-17
 203
 204 ### Changed
 205
 206 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
 207
 208 ### Added
 209
 210 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
 211 - Add `start()` method to pool API to start the minimum number of workers.
 212 - 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.
 213 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
 214
 215 ## [2.6.44] - 2023-09-08
 216
 217 ### Fixed
 218
 219 - Use a dedicated PAT to publish on GitHub packages registry.
 220
 221 ### Added
 222
 223 - Publish on GitHub packages registry on release.
 224
 225 ### Changed
 226
 227 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
 228
 229 ## [2.6.43] - 2023-09-08
 230
 231 ### Added
 232
 233 - Publish on GitHub packages registry on release.
 234
 235 ### Changed
 236
 237 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
 238
 239 ## [2.6.42] - 2023-09-06
 240
 241 ### Changed
 242
 243 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
 244
 245 ## [2.6.41] - 2023-09-03
 246
 247 ### Changed
 248
 249 - Optimize worker choice strategies implementation.
 250
 251 ## [2.6.40] - 2023-09-01
 252
 253 ### Fixed
 254
 255 - Do not pre-choose in WRR worker choice strategy to avoid bias.
 256 - Avoid array out of bound in worker choice strategies after worker node removal.
 257
 258 ## [2.6.39] - 2023-08-30
 259
 260 ### Fixed
 261
 262 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
 263
 264 ## [2.6.38] - 2023-08-30
 265
 266 ### Added
 267
 268 - Bundle typescript types declaration into one file.
 269
 270 ### Changed
 271
 272 - Improve interleaved weighted round robin worker choice strategy implementation.
 273
 274 ## [2.6.37] - 2023-08-28
 275
 276 ### Fixed
 277
 278 - Ensure unused worker usage statistics are deleted at runtime.
 279
 280 ### Changed
 281
 282 - Rename worker choice strategy options `choiceRetries` to `retries`.
 283 - Avoid unnecessary branching in worker choice strategies.
 284
 285 ## [2.6.36] - 2023-08-27
 286
 287 ### Fixed
 288
 289 - Fix pool `execute()` arguments check.
 290
 291 ### Changed
 292
 293 - Make continuous tasks stealing algorithm less aggressive.
 294 - Fine tune tasks stealing algorithm under back pressure.
 295
 296 ## [2.6.35] - 2023-08-25
 297
 298 ### Fixed
 299
 300 - Don't account worker usage statistics for tasks that have failed.
 301 - Fix pool information runtime and wait time median computation.
 302
 303 ### Changed
 304
 305 - Update simple moving average implementation to use a circular buffer.
 306 - Update simple moving median implementation to use a circular buffer.
 307 - Account for stolen tasks in worker usage statistics and pool information.
 308
 309 ### Added
 310
 311 - Continuous tasks stealing algorithm.
 312
 313 ## [2.6.34] - 2023-08-24
 314
 315 ### Fixes
 316
 317 - Avoid cascading tasks stealing under back pressure.
 318
 319 ### Changed
 320
 321 - Add fastpath to queued tasks rescheduling.
 322
 323 ## [2.6.33] - 2023-08-24
 324
 325 ### Fixed
 326
 327 - Fix queued tasks rescheduling.
 328
 329 ### Changed
 330
 331 - Rename tasks queue options `queueMaxSize` to `size`.
 332
 333 ### Added
 334
 335 - Task stealing scheduling algorithm if tasks queueing is enabled.
 336
 337 ## [2.6.32] - 2023-08-23
 338
 339 ### Fixed
 340
 341 - Ensure no task can be executed when the pool is destroyed.
 342
 343 ### Added
 344
 345 - Add `queueMaxSize` option to tasks queue options.
 346 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
 347 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
 348
 349 ## [2.6.31] - 2023-08-20
 350
 351 ### Fixed
 352
 353 - Fix worker choice strategy retries mechanism in some edge cases.
 354
 355 ### Changed
 356
 357 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
 358 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
 359
 360 ## [2.6.30] - 2023-08-19
 361
 362 ### Fixed
 363
 364 - Ensure pool event `backPressure` is emitted.
 365 - Ensure pool event `full` is emitted only once.
 366 - Ensure worker node cannot be instantiated without proper arguments.
 367
 368 ## [2.6.29] - 2023-08-18
 369
 370 ### Fixed
 371
 372 - Fix race condition between readiness and task functions worker message handling at startup.
 373 - Fix duplicate task function worker usage statistics computation per task function.
 374 - Update task function worker usage statistics if and only if there's at least two different task functions.
 375 - Fix race condition at task function worker usage executing task computation leading to negative value.
 376
 377 ### Added
 378
 379 - 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).
 380 - Use back pressure detection in worker choice strategies.
 381 - Add worker choice strategies retries mechanism if no worker is eligible.
 382
 383 ## [2.6.28] - 2023-08-16
 384
 385 ### Fixed
 386
 387 - Ensure pool workers are properly initialized.
 388
 389 ### Added
 390
 391 - HTTP server pool examples: express-cluster, express-hybrid.
 392
 393 ### Changed
 394
 395 - Remove now useless branching in worker hot code path.
 396
 397 ## [2.6.27] - 2023-08-15
 398
 399 ### Fixed
 400
 401 - Add `KillHandler` type definition to exported types.
 402
 403 ### Added
 404
 405 - Add `destroy` event to pool API.
 406
 407 ## [2.6.26] - 2023-08-15
 408
 409 ### Added
 410
 411 - Add kill handler to worker options allowing to execute custom code when worker is killed.
 412 - Add `listTaskFunctions()` method to pool API.
 413 - SMTP client pool example: nodemailer.
 414
 415 ## [2.6.25] - 2023-08-13
 416
 417 ### Added
 418
 419 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
 420 - WebSocket server pool examples: ws-cluster, ws-hybrid.
 421
 422 ## [2.6.24] - 2023-08-12
 423
 424 ### Added
 425
 426 - Add array of transferable objects to the `execute()` method arguments.
 427 - WebSocket server pool examples: ws-worker_threads.
 428
 429 ## [2.6.23] - 2023-08-11
 430
 431 ### Fixed
 432
 433 - 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.
 434
 435 ### Added
 436
 437 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
 438 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
 439
 440 ## [2.6.22] - 2023-08-10
 441
 442 ### Fixed
 443
 444 - Add missing `types` field to package.json `exports`.
 445
 446 ### Changed
 447
 448 - Structure markdown documentation (PR #811).
 449
 450 ## [2.6.21] - 2023-08-03
 451
 452 ### Changed
 453
 454 - Improve code documentation.
 455 - Code refactoring and cleanup for better maintainability and readability.
 456
 457 ## [2.6.20] - 2023-07-21
 458
 459 ### Fixed
 460
 461 - Fix queued tasks redistribution on error task execution starvation.
 462 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
 463
 464 ### Changed
 465
 466 - Drastically reduce lookups by worker in the worker nodes.
 467
 468 ## [2.6.19] - 2023-07-20
 469
 470 ### Added
 471
 472 - Dedicated internal communication channel for worker_threads pools.
 473
 474 ## [2.6.18] - 2023-07-19
 475
 476 ### Changed
 477
 478 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
 479
 480 ## [2.6.17] - 2023-07-16
 481
 482 ### Added
 483
 484 - Add `listTaskFunctions()` method to worker API.
 485
 486 ## [2.6.16] - 2023-07-12
 487
 488 ### Fixed
 489
 490 - Fix pool startup detection.
 491 - Fix worker task functions handling.
 492
 493 ## [2.6.15] - 2023-07-11
 494
 495 ### Added
 496
 497 - Take into account worker node readiness in worker choice strategies.
 498
 499 ## [2.6.14] - 2023-07-10
 500
 501 ### Fixed
 502
 503 - Fix task function statistics tracking.
 504
 505 ## [2.6.13] - 2023-07-10
 506
 507 ### Added
 508
 509 - Add per task function statistics tracking.
 510 - Add public methods to manipulate the worker task functions at runtime.
 511
 512 ## [2.6.12] - 2023-07-09
 513
 514 ### Fixed
 515
 516 - Workaround import issue with `node:os` module in node 16.x.x.
 517
 518 ## [2.6.11] - 2023-07-09
 519
 520 ### Fixed
 521
 522 - Fix pool readiness semantic.
 523
 524 ## [2.6.10] - 2023-07-08
 525
 526 ### Fixed
 527
 528 - Ensure workers are not recreated on error at pool startup.
 529
 530 ### Added
 531
 532 - Add `ready` and `strategy` fields to pool information.
 533 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
 534 - Add dynamic pool sizing checks.
 535
 536 ## [2.6.9] - 2023-07-07
 537
 538 ### Fixed
 539
 540 - Recreate the right worker type on uncaught exception.
 541
 542 ### Added
 543
 544 - Add minimum and maximum to internal measurement statistics.
 545 - Add `runTime` and `waitTime` to pool information.
 546 - Check worker inactive time only on dynamic worker.
 547
 548 ## [2.6.8] - 2023-07-03
 549
 550 ### Fixed
 551
 552 - Brown paper bag release to fix version handling in pool information.
 553
 554 ## [2.6.7] - 2023-07-03
 555
 556 ### Fixed
 557
 558 - Ensure worker queued tasks at error are reassigned to other pool workers.
 559
 560 ### Added
 561
 562 - Add pool `utilization` ratio to pool information.
 563 - Add `version` to pool information.
 564 - Add worker information to worker nodes.
 565
 566 ## [2.6.6] - 2023-07-01
 567
 568 ### Added
 569
 570 - Add safe helper `availableParallelism()` to help sizing the pool.
 571
 572 ### Fixed
 573
 574 - Ensure message handler is only registered in worker.
 575
 576 ## [2.6.5] - 2023-06-27
 577
 578 ### Known issues
 579
 580 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
 581
 582 ### Fixed
 583
 584 - Artificial version bump to 2.6.5 to workaround publication issue.
 585 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
 586 - Ensure pool event is emitted before task error promise rejection.
 587 - Fix queued tasks count computation.
 588
 589 ### Removed
 590
 591 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
 592
 593 ## [2.6.4] - 2023-06-27
 594
 595 ### Known issues
 596
 597 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
 598
 599 ### Fixed
 600
 601 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
 602 - Ensure pool event is emitted before task error promise rejection.
 603 - Fix queued tasks count computation.
 604
 605 ### Removed
 606
 607 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
 608
 609 ## [2.6.3] - 2023-06-19
 610
 611 ### Fixed
 612
 613 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
 614 - Update strategies internals after statistics computation.
 615
 616 ### Changed
 617
 618 - Optimize O(1) queue implementation.
 619
 620 ## [2.6.2] - 2023-06-12
 621
 622 ### Fixed
 623
 624 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
 625
 626 ## [2.6.1] - 2023-06-10
 627
 628 ### Added
 629
 630 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
 631
 632 ### Fixed
 633
 634 - Fix average statistics computation: ensure failed tasks are not accounted.
 635
 636 ## [2.6.0] - 2023-06-09
 637
 638 ### Added
 639
 640 - Add `LEAST_ELU` worker choice strategy (experimental).
 641 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
 642
 643 ### Changed
 644
 645 - Refactor pool worker node usage internals.
 646 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
 647 - Breaking change: pool information `info` property object fields have been renamed.
 648
 649 ### Fixed
 650
 651 - Fix wait time accounting.
 652 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
 653 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
 654
 655 ## [2.5.4] - 2023-06-07
 656
 657 ### Added
 658
 659 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
 660
 661 ### Changed
 662
 663 - Compute statistics at the worker level only if needed.
 664 - Add `worker_threads` options to thread pool options.
 665
 666 ### Fixed
 667
 668 - Make the `LEAST_BUSY` strategy only relies on task runtime.
 669
 670 ## [2.5.3] - 2023-06-04
 671
 672 ### Changed
 673
 674 - Refine pool information content.
 675 - Limit pool internals public exposure.
 676
 677 ## [2.5.2] - 2023-06-02
 678
 679 ### Added
 680
 681 - Add `taskError` pool event for task execution error.
 682 - Add pool information `info` property to pool.
 683 - Emit pool information on `busy` and `full` pool events.
 684
 685 ## [2.5.1] - 2023-06-01
 686
 687 ### Added
 688
 689 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
 690 - Add `error` pool event for uncaught worker error.
 691
 692 ## [2.5.0] - 2023-05-31
 693
 694 ### Added
 695
 696 - Switch pool event emitter to `EventEmitterAsyncResource`.
 697 - Add tasks wait time accounting in per worker tasks usage.
 698 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
 699
 700 ### Changed
 701
 702 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
 703
 704 ## [2.4.14] - 2023-05-09
 705
 706 ### Fixed
 707
 708 - Ensure no undefined task runtime can land in the tasks history.
 709 - Fix median computation implementation once again.
 710
 711 ### Added
 712
 713 - Unit tests for median and queue implementations.
 714
 715 ## [2.4.13] - 2023-05-08
 716
 717 ### Fixed
 718
 719 - Fix worker choice strategy options validation.
 720 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
 721
 722 ## [2.4.12] - 2023-05-06
 723
 724 ### Added
 725
 726 - Support multiple task functions per worker.
 727 - Add custom worker weights support to worker choice strategies options.
 728
 729 ### Changed
 730
 731 - Use O(1) queue implementation for tasks queueing.
 732
 733 ### Fixed
 734
 735 - Fix median computation implementation.
 736 - Fix fair share worker choice strategy internals update.
 737
 738 ## [2.4.11] - 2023-04-23
 739
 740 ### Changed
 741
 742 - Optimize free worker finding in worker choice strategies.
 743
 744 ## [2.4.10] - 2023-04-15
 745
 746 ### Fixed
 747
 748 - Fix typescript type definition for task function: ensure the input data is optional.
 749 - Fix typescript type definition for pool execute(): ensure the input data is optional.
 750
 751 ## [2.4.9] - 2023-04-15
 752
 753 ### Added
 754
 755 - Add tasks queue enablement runtime setter to pool.
 756 - Add tasks queue options runtime setter to pool.
 757 - Add worker choice strategy options runtime setter to pool.
 758
 759 ### Changed
 760
 761 - Remove the tasks queuing experimental status.
 762
 763 ### Fixed
 764
 765 - Fix task function type definition and validation.
 766 - Fix worker choice strategy options handling.
 767
 768 ## [2.4.8] - 2023-04-12
 769
 770 ### Fixed
 771
 772 - Fix message between main worker and worker type definition for tasks.
 773 - Fix code documentation.
 774
 775 ## [2.4.7] - 2023-04-11
 776
 777 ### Added
 778
 779 - Add worker tasks queue options to pool options.
 780
 781 ### Fixed
 782
 783 - Fix missing documentation.
 784
 785 ## [2.4.6] - 2023-04-10
 786
 787 ### Fixed
 788
 789 - Ensure one task at a time is executed per worker with tasks queueing enabled.
 790 - Properly count worker executing tasks with tasks queueing enabled.
 791
 792 ## [2.4.5] - 2023-04-09
 793
 794 ### Added
 795
 796 - Use monotonic high resolution timer for worker tasks runtime.
 797 - Add worker tasks median runtime to statistics.
 798 - Add worker tasks queue (experimental).
 799
 800 ## [2.4.4] - 2023-04-07
 801
 802 ### Added
 803
 804 - Add `PoolEvents` enumeration and `PoolEvent` type.
 805
 806 ### Fixed
 807
 808 - Destroy worker only on alive check.
 809
 810 ## [2.4.3] - 2023-04-07
 811
 812 ### Fixed
 813
 814 - Fix typedoc generation with inheritance.
 815
 816 ## [2.4.2] - 2023-04-06
 817
 818 ### Added
 819
 820 - Add `full` event to dynamic pool.
 821 - Keep worker choice strategy in memory for conditional reuse.
 822
 823 ### Fixed
 824
 825 - Fix possible negative worker key at worker removal in worker choice strategies.
 826
 827 ## [2.4.1] - 2023-04-05
 828
 829 ### Changed
 830
 831 - Optimize worker choice strategy for dynamic pool.
 832
 833 ### Fixed
 834
 835 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
 836
 837 ## [2.4.0] - 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 - Optimize tasks usage statistics requirements for worker choice strategy.
 851
 852 ### Fixed
 853
 854 - Ensure trimmable characters are checked at pool initialization.
 855 - Fix message id integer overflow.
 856 - Fix pool worker removal in worker choice strategy internals.
 857 - Fix package publication with pnpm.
 858
 859 ## [2.4.0-3] - 2023-04-04
 860
 861 ### Added
 862
 863 - Add `LESS_BUSY` worker choice strategy.
 864
 865 ### Changed
 866
 867 - Optimize worker storage in pool.
 868 - Optimize worker alive status check.
 869 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
 870 - Optimize `LESS_USED` worker choice strategy.
 871 - Update benchmark versus external threads pools.
 872
 873 ### Fixed
 874
 875 - Ensure trimmable characters are checked at pool initialization.
 876 - Fix message id integer overflow.
 877 - Fix pool worker removal in worker choice strategy internals.
 878 - Fix package publication with pnpm.
 879
 880 ## [2.4.0-2] - 2023-04-03
 881
 882 ### Added
 883
 884 - Add `LESS_BUSY` worker choice strategy.
 885
 886 ### Changed
 887
 888 - Optimize worker storage in pool.
 889 - Optimize worker alive status check.
 890 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
 891 - Optimize `LESS_USED` worker choice strategy.
 892
 893 ### Fixed
 894
 895 - Ensure trimmable characters are checked at pool initialization.
 896 - Fix message id integer overflow.
 897 - Fix pool worker removal in worker choice strategy internals.
 898 - Fix package publication with pnpm.
 899
 900 ## [2.4.0-1] - 2023-04-03
 901
 902 ### Added
 903
 904 - Add `LESS_BUSY` worker choice strategy.
 905
 906 ### Changed
 907
 908 - Optimize worker storage in pool.
 909 - Optimize worker alive status check.
 910 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
 911 - Optimize `LESS_USED` worker choice strategy.
 912
 913 ### Fixed
 914
 915 - Ensure trimmable characters are checked at pool initialization.
 916 - Fix message id integer overflow.
 917 - Fix pool worker removal in worker choice strategy internals.
 918
 919 ## [2.4.0-0] - 2023-04-03
 920
 921 ### Added
 922
 923 - Add `LESS_BUSY` worker choice strategy.
 924
 925 ### Changed
 926
 927 - Optimize worker storage in pool.
 928 - Optimize worker alive status check.
 929 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
 930 - Optimize `LESS_USED` worker choice strategy.
 931
 932 ### Fixed
 933
 934 - Ensure trimmable characters are checked at pool initialization.
 935 - Fix message id integer overflow.
 936 - Fix pool worker removal in worker choice strategy internals.
 937
 938 ## [2.3.10] - 2023-03-18
 939
 940 ### Fixed
 941
 942 - Fix package.json `exports` syntax for ESM and CommonJS.
 943
 944 ### Changed
 945
 946 - Permit SemVer pre-release publication.
 947
 948 ## [2.3.10-2] - 2023-03-18
 949
 950 ### Fixed
 951
 952 - Fix package.json `exports` syntax for ESM and CommonJS.
 953
 954 ## [2.3.10-1] - 2023-03-18
 955
 956 ### Changed
 957
 958 - Permit SemVer pre-release publication.
 959
 960 ## [2.3.10-0] - 2023-03-18
 961
 962 ### Fixed
 963
 964 - Fix package.json `exports` syntax for ESM and CommonJS.
 965
 966 ## [2.3.9] - 2023-03-18
 967
 968 ### Changed
 969
 970 - Introduce ESM module support along with CommonJS one.
 971
 972 ### Fixed
 973
 974 - Fix brown paper bag bug referencing the same object literal.
 975
 976 ## [2.3.8] - 2023-03-18
 977
 978 ### Changed
 979
 980 - Switch internal benchmarking code to benny.
 981 - Switch to TypeScript 5.x.x.
 982 - Switch rollup bundler plugins to core ones.
 983 - Switch to TSDoc syntax.
 984 - Enforce conventional commits.
 985
 986 ### Fixed
 987
 988 - Fix random integer generator.
 989 - Fix worker choice strategy pool type identification at initialization.
 990
 991 ## [2.3.7] - 2022-10-23
 992
 993 ### Changed
 994
 995 - Switch to open collective FOSS project funding platform.
 996 - Switch to ts-standard linter configuration on TypeScript code.
 997
 998 ### Fixed
 999
1000 - Fixed missing async on pool execute method.
1001 - Fixed typing in TypeScript example.
1002 - Fixed types in unit tests.
1003
1004 ## [2.3.6] - 2022-10-22
1005
1006 ### Changed
1007
1008 - Cleanup pool attributes and methods.
1009 - Refine error types thrown.
1010
1011 ### Fixed
1012
1013 - Fix continuous integration build on windows.
1014 - Fix code coverage reporting by using c8 instead of nyc.
1015
1016 ## [2.3.5] - 2022-10-21
1017
1018 ### Changed
1019
1020 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
1021 - Optimize tasks usage lookup implementation.
1022
1023 ### Fixed
1024
1025 - Fix missed pool event emitter type export.
1026 - Fix typedoc documentation generation.
1027
1028 ## [2.3.4] - 2022-10-17
1029
1030 ### Added
1031
1032 - Fully automate release process with release-it.
1033
1034 ### Changed
1035
1036 - Optimize fair share task scheduling algorithm implementation.
1037 - Update benchmark versus external pools results with latest version.
1038
1039 ## [2.3.3] - 2022-10-15
1040
1041 ### Added
1042
1043 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
1044
1045 ## [2.3.2] - 2022-10-14
1046
1047 ### Changed
1048
1049 - Optimize fair share worker selection strategy implementation.
1050
1051 ### Fixed
1052
1053 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
1054
1055 ## [2.3.1] - 2022-10-13
1056
1057 ### Added
1058
1059 - Pool worker choice strategies:
1060   - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
1061   - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
1062
1063 ## [2.2.2] - 2022-10-09
1064
1065 ### Fixed
1066
1067 - Fixed `README.md` file.
1068
1069 ## [2.2.1] - 2022-10-08
1070
1071 ### Added
1072
1073 - Dynamic worker choice strategy change at runtime.
1074
1075 ## [2.2.0] - 2022-01-05
1076
1077 ### Breaking Changes
1078
1079 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
1080
1081 ## [2.1.0] - 2021-08-29
1082
1083 ### Added
1084
1085 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
1086
1087 ### Breaking Changes
1088
1089 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
1090 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
1091 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
1092 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
1093
1094 ## [2.0.2] - 2021-05-12
1095
1096 ### Bug fixes
1097
1098 - Fix `busy` event emission on fixed pool type
1099
1100 ## [2.0.1] - 2021-03-16
1101
1102 ### Bug fixes
1103
1104 - Check if pool options are properly set.
1105 - `busy` event is emitted on all pool types.
1106
1107 ## [2.0.0] - 2021-03-01
1108
1109 ### Bug fixes
1110
1111 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1112
1113 ### Breaking Changes
1114
1115 - `FullPool` event is now renamed to `busy`.
1116 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1117   _Find more details on our JSDoc._
1118
1119 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1120
1121 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1122
1123 ### Pool options types declaration merge
1124
1125 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1126
1127 #### New `export` strategy
1128
1129 ```js
1130 // Before
1131 const DynamicThreadPool = require('poolifier/lib/dynamic')
1132 // After
1133 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1134 ```
1135
1136 But you should always prefer just using
1137
1138 ```js
1139 const { DynamicThreadPool } = require('poolifier')
1140 ```
1141
1142 #### New type definitions for input data and response
1143
1144 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1145 _This is not a limitation by poolifier but Node.js._
1146
1147 #### Public property replacements
1148
1149 `numWorkers` property is now `numberOfWorkers`
1150
1151 #### Internal (protected) properties and methods renaming
1152
1153 These properties are not intended for end users
1154
1155 - `id` => `nextMessageId`
1156
1157 These methods are not intended for end users
1158
1159 - `_chooseWorker` => `chooseWorker`
1160 - `_newWorker` => `createWorker`
1161 - `_execute` => `internalExecute`
1162 - `_chooseWorker` => `chooseWorker`
1163 - `_checkAlive` => `checkAlive`
1164 - `_run` => `run`
1165 - `_runAsync` => `runAsync`
1166
1167 ## [1.1.0] - 2020-05-21
1168
1169 ### Added
1170
1171 - ThreadWorker support async functions as option
1172 - Various external library patches
1173
1174 ## [1.0.0] - 2020-01-24
1175
1176 ### Added
1177
1178 - FixedThreadPool implementation
1179 - DynamicThreadPool implementation
1180 - WorkerThread implementation to improve developer experience