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