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