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