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