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