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