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