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 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
  13
  14 ## [2.7.4] - 2023-09-25
  15
  16 ### Fixed
  17
  18 - Fix source maps (bundler issue).
  19
  20 ## [2.7.3] - 2023-09-24
  21
  22 ### Changed
  23
  24 - Convert pool event emitter to event emitter async resource.
  25
  26 ## [2.7.2] - 2023-09-23
  27
  28 ### Changed
  29
  30 - Add source maps to npm package to ease debugging.
  31
  32 ### Added
  33
  34 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
  35
  36 ## [2.7.1] - 2023-09-20
  37
  38 ### Fixed
  39
  40 - Ensure worker message listener used one time are removed after usage.
  41
  42 ## [2.7.0] - 2023-09-19
  43
  44 ### Fixed
  45
  46 - Fix task stealing related tasks queue options handling at runtime.
  47
  48 ### Changed
  49
  50 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
  51
  52 ### Added
  53
  54 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
  55 - Stricter worker constructor arguments validation.
  56
  57 ## [2.6.45] - 2023-09-17
  58
  59 ### Changed
  60
  61 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
  62
  63 ### Added
  64
  65 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
  66 - Add `start()` method to pool API to start the minimum number of workers.
  67 - Add `taskStealing` and `tasksStealingOnPressure` to tasks queue options to whether enable task stealing or not and whether enable tasks stealing under back pressure or not.
  68 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
  69
  70 ## [2.6.44] - 2023-09-08
  71
  72 ### Fixed
  73
  74 - Use a dedicated PAT to publish on GitHub packages registry.
  75
  76 ### Added
  77
  78 - Publish on GitHub packages registry on release.
  79
  80 ### Changed
  81
  82 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
  83
  84 ## [2.6.43] - 2023-09-08
  85
  86 ### Added
  87
  88 - Publish on GitHub packages registry on release.
  89
  90 ### Changed
  91
  92 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
  93
  94 ## [2.6.42] - 2023-09-06
  95
  96 ### Changed
  97
  98 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
  99
 100 ## [2.6.41] - 2023-09-03
 101
 102 ### Changed
 103
 104 - Optimize worker choice strategies implementation.
 105
 106 ## [2.6.40] - 2023-09-01
 107
 108 ### Fixed
 109
 110 - Do not pre-choose in WRR worker choice strategy to avoid bias.
 111 - Avoid array out of bound in worker choice strategies after worker node removal.
 112
 113 ## [2.6.39] - 2023-08-30
 114
 115 ### Fixed
 116
 117 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
 118
 119 ## [2.6.38] - 2023-08-30
 120
 121 ### Added
 122
 123 - Bundle typescript types declaration into one file.
 124
 125 ### Changed
 126
 127 - Improve interleaved weighted round robin worker choice strategy implementation.
 128
 129 ## [2.6.37] - 2023-08-28
 130
 131 ### Fixed
 132
 133 - Ensure unused worker usage statistics are deleted at runtime.
 134
 135 ### Changed
 136
 137 - Rename worker choice strategy options `choiceRetries` to `retries`.
 138 - Avoid unnecessary branching in worker choice strategies.
 139
 140 ## [2.6.36] - 2023-08-27
 141
 142 ### Fixed
 143
 144 - Fix pool `execute()` arguments check.
 145
 146 ### Changed
 147
 148 - Make continuous tasks stealing algorithm less aggressive.
 149 - Fine tune tasks stealing algorithm under back pressure.
 150
 151 ## [2.6.35] - 2023-08-25
 152
 153 ### Fixed
 154
 155 - Don't account worker usage statistics for tasks that have failed.
 156 - Fix pool information runtime and wait time median computation.
 157
 158 ### Changed
 159
 160 - Update simple moving average implementation to use a circular buffer.
 161 - Update simple moving median implementation to use a circular buffer.
 162 - Account for stolen tasks in worker usage statistics and pool information.
 163
 164 ### Added
 165
 166 - Continuous tasks stealing algorithm.
 167
 168 ## [2.6.34] - 2023-08-24
 169
 170 ### Fixes
 171
 172 - Avoid cascading tasks stealing under back pressure.
 173
 174 ### Changed
 175
 176 - Add fastpath to queued tasks rescheduling.
 177
 178 ## [2.6.33] - 2023-08-24
 179
 180 ### Fixed
 181
 182 - Fix queued tasks rescheduling.
 183
 184 ### Changed
 185
 186 - Rename tasks queue options `queueMaxSize` to `size`.
 187
 188 ### Added
 189
 190 - Task stealing scheduling algorithm if tasks queueing is enabled.
 191
 192 ## [2.6.32] - 2023-08-23
 193
 194 ### Fixed
 195
 196 - Ensure no task can be executed when the pool is destroyed.
 197
 198 ### Added
 199
 200 - Add `queueMaxSize` option to tasks queue options.
 201 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
 202 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
 203
 204 ## [2.6.31] - 2023-08-20
 205
 206 ### Fixed
 207
 208 - Fix worker choice strategy retries mechanism in some edge cases.
 209
 210 ### Changed
 211
 212 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
 213 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
 214
 215 ## [2.6.30] - 2023-08-19
 216
 217 ### Fixed
 218
 219 - Ensure pool event `backPressure` is emitted.
 220 - Ensure pool event `full` is emitted only once.
 221 - Ensure worker node cannot be instantiated without proper arguments.
 222
 223 ## [2.6.29] - 2023-08-18
 224
 225 ### Fixed
 226
 227 - Fix race condition between ready and task functions worker message handling at startup.
 228 - Fix duplicate task function worker usage statistics computation per task function.
 229 - Update task function worker usage statistics if and only if there's at least two different task functions.
 230 - Fix race condition at task function worker usage executing task computation leading to negative value.
 231
 232 ### Added
 233
 234 - 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).
 235 - Use back pressure detection in worker choice strategies.
 236 - Add worker choice strategies retries mechanism if no worker is eligible.
 237
 238 ## [2.6.28] - 2023-08-16
 239
 240 ### Fixed
 241
 242 - Ensure pool workers are properly initialized.
 243
 244 ### Added
 245
 246 - HTTP server pool examples: express-cluster, express-hybrid.
 247
 248 ### Changed
 249
 250 - Remove now useless branching in worker hot code path.
 251
 252 ## [2.6.27] - 2023-08-15
 253
 254 ### Fixed
 255
 256 - Add `KillHandler` type definition to exported types.
 257
 258 ### Added
 259
 260 - Add `destroy` event to pool API.
 261
 262 ## [2.6.26] - 2023-08-15
 263
 264 ### Added
 265
 266 - Add kill handler to worker options allowing to execute custom code when worker is killed.
 267 - Add `listTaskFunctions()` method to pool API.
 268 - SMTP client pool example: nodemailer.
 269
 270 ## [2.6.25] - 2023-08-13
 271
 272 ### Added
 273
 274 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
 275 - WebSocket server pool examples: ws-cluster, ws-hybrid.
 276
 277 ## [2.6.24] - 2023-08-12
 278
 279 ### Added
 280
 281 - Add array of transferable objects to the `execute()` method arguments.
 282 - WebSocket server pool examples: ws-worker_threads.
 283
 284 ## [2.6.23] - 2023-08-11
 285
 286 ### Fixed
 287
 288 - 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.
 289
 290 ### Added
 291
 292 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
 293 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
 294
 295 ## [2.6.22] - 2023-08-10
 296
 297 ### Fixed
 298
 299 - Add missing `types` field to package.json `exports`.
 300
 301 ### Changed
 302
 303 - Structure markdown documentation (PR #811).
 304
 305 ## [2.6.21] - 2023-08-03
 306
 307 ### Changed
 308
 309 - Improve code documentation.
 310 - Code refactoring and cleanup for better maintainability and readability.
 311
 312 ## [2.6.20] - 2023-07-21
 313
 314 ### Fixed
 315
 316 - Fix queued tasks redistribution on error task execution starvation.
 317 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
 318
 319 ### Changed
 320
 321 - Drastically reduce lookups by worker in the worker nodes.
 322
 323 ## [2.6.19] - 2023-07-20
 324
 325 ### Added
 326
 327 - Dedicated internal communication channel for worker_threads pools.
 328
 329 ## [2.6.18] - 2023-07-19
 330
 331 ### Changed
 332
 333 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
 334
 335 ## [2.6.17] - 2023-07-16
 336
 337 ### Added
 338
 339 - Add `listTaskFunctions()` method to worker API.
 340
 341 ## [2.6.16] - 2023-07-12
 342
 343 ### Fixed
 344
 345 - Fix pool startup detection.
 346 - Fix worker task functions handling.
 347
 348 ## [2.6.15] - 2023-07-11
 349
 350 ### Added
 351
 352 - Take into account worker node readiness in worker choice strategies.
 353
 354 ## [2.6.14] - 2023-07-10
 355
 356 ### Fixed
 357
 358 - Fix task function statistics tracking.
 359
 360 ## [2.6.13] - 2023-07-10
 361
 362 ### Added
 363
 364 - Add per task function statistics tracking.
 365 - Add public methods to manipulate the worker task functions at runtime.
 366
 367 ## [2.6.12] - 2023-07-09
 368
 369 ### Fixed
 370
 371 - Workaround import issue with `node:os` module in node 16.x.x.
 372
 373 ## [2.6.11] - 2023-07-09
 374
 375 ### Fixed
 376
 377 - Fix pool readiness semantic.
 378
 379 ## [2.6.10] - 2023-07-08
 380
 381 ### Fixed
 382
 383 - Ensure workers are not recreated on error at pool startup.
 384
 385 ### Added
 386
 387 - Add `ready` and `strategy` fields to pool information.
 388 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
 389 - Add dynamic pool sizing checks.
 390
 391 ## [2.6.9] - 2023-07-07
 392
 393 ### Fixed
 394
 395 - Recreate the right worker type on uncaught exception.
 396
 397 ### Added
 398
 399 - Add minimum and maximum to internal measurement statistics.
 400 - Add `runTime` and `waitTime` to pool information.
 401 - Check worker inactive time only on dynamic worker.
 402
 403 ## [2.6.8] - 2023-07-03
 404
 405 ### Fixed
 406
 407 - Brown paper bag release to fix version handling in pool information.
 408
 409 ## [2.6.7] - 2023-07-03
 410
 411 ### Fixed
 412
 413 - Ensure worker queued tasks at error are reassigned to other pool workers.
 414
 415 ### Added
 416
 417 - Add pool `utilization` ratio to pool information.
 418 - Add `version` to pool information.
 419 - Add worker information to worker nodes.
 420
 421 ## [2.6.6] - 2023-07-01
 422
 423 ### Added
 424
 425 - Add safe helper `availableParallelism()` to help sizing the pool.
 426
 427 ### Fixed
 428
 429 - Ensure message handler is only registered in worker.
 430
 431 ## [2.6.5] - 2023-06-27
 432
 433 ### Known issues
 434
 435 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
 436
 437 ### Fixed
 438
 439 - Artificial version bump to 2.6.5 to workaround publication issue.
 440 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
 441 - Ensure pool event is emitted before task error promise rejection.
 442 - Fix queued tasks count computation.
 443
 444 ### Removed
 445
 446 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
 447
 448 ## [2.6.4] - 2023-06-27
 449
 450 ### Known issues
 451
 452 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
 453
 454 ### Fixed
 455
 456 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
 457 - Ensure pool event is emitted before task error promise rejection.
 458 - Fix queued tasks count computation.
 459
 460 ### Removed
 461
 462 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
 463
 464 ## [2.6.3] - 2023-06-19
 465
 466 ### Fixed
 467
 468 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
 469 - Update strategies internals after statistics computation.
 470
 471 ### Changed
 472
 473 - Optimize O(1) queue implementation.
 474
 475 ## [2.6.2] - 2023-06-12
 476
 477 ### Fixed
 478
 479 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
 480
 481 ## [2.6.1] - 2023-06-10
 482
 483 ### Added
 484
 485 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
 486
 487 ### Fixed
 488
 489 - Fix average statistics computation: ensure failed tasks are not accounted.
 490
 491 ## [2.6.0] - 2023-06-09
 492
 493 ### Added
 494
 495 - Add `LEAST_ELU` worker choice strategy (experimental).
 496 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
 497
 498 ### Changed
 499
 500 - Refactor pool worker node usage internals.
 501 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
 502 - Breaking change: pool information `info` property object fields have been renamed.
 503
 504 ### Fixed
 505
 506 - Fix wait time accounting.
 507 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
 508 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
 509
 510 ## [2.5.4] - 2023-06-07
 511
 512 ### Added
 513
 514 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
 515
 516 ### Changed
 517
 518 - Compute statistics at the worker level only if needed.
 519 - Add `worker_threads` options to thread pool options.
 520
 521 ### Fixed
 522
 523 - Make the `LEAST_BUSY` strategy only relies on task runtime.
 524
 525 ## [2.5.3] - 2023-06-04
 526
 527 ### Changed
 528
 529 - Refine pool information content.
 530 - Limit pool internals public exposure.
 531
 532 ## [2.5.2] - 2023-06-02
 533
 534 ### Added
 535
 536 - Add `taskError` pool event for task execution error.
 537 - Add pool information `info` property to pool.
 538 - Emit pool information on `busy` and `full` pool events.
 539
 540 ## [2.5.1] - 2023-06-01
 541
 542 ### Added
 543
 544 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
 545 - Add `error` pool event for uncaught worker error.
 546
 547 ## [2.5.0] - 2023-05-31
 548
 549 ### Added
 550
 551 - Switch pool event emitter to `EventEmitterAsyncResource`.
 552 - Add tasks wait time accounting in per worker tasks usage.
 553 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
 554
 555 ### Changed
 556
 557 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
 558
 559 ## [2.4.14] - 2023-05-09
 560
 561 ### Fixed
 562
 563 - Ensure no undefined task runtime can land in the tasks history.
 564 - Fix median computation implementation once again.
 565
 566 ### Added
 567
 568 - Unit tests for median and queue implementations.
 569
 570 ## [2.4.13] - 2023-05-08
 571
 572 ### Fixed
 573
 574 - Fix worker choice strategy options validation.
 575 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
 576
 577 ## [2.4.12] - 2023-05-06
 578
 579 ### Added
 580
 581 - Support multiple task functions per worker.
 582 - Add custom worker weights support to worker choice strategies options.
 583
 584 ### Changed
 585
 586 - Use O(1) queue implementation for tasks queueing.
 587
 588 ### Fixed
 589
 590 - Fix median computation implementation.
 591 - Fix fair share worker choice strategy internals update.
 592
 593 ## [2.4.11] - 2023-04-23
 594
 595 ### Changed
 596
 597 - Optimize free worker finding in worker choice strategies.
 598
 599 ## [2.4.10] - 2023-04-15
 600
 601 ### Fixed
 602
 603 - Fix typescript type definition for task function: ensure the input data is optional.
 604 - Fix typescript type definition for pool execute(): ensure the input data is optional.
 605
 606 ## [2.4.9] - 2023-04-15
 607
 608 ### Added
 609
 610 - Add tasks queue enablement runtime setter to pool.
 611 - Add tasks queue options runtime setter to pool.
 612 - Add worker choice strategy options runtime setter to pool.
 613
 614 ### Changed
 615
 616 - Remove the tasks queuing experimental status.
 617
 618 ### Fixed
 619
 620 - Fix task function type definition and validation.
 621 - Fix worker choice strategy options handling.
 622
 623 ## [2.4.8] - 2023-04-12
 624
 625 ### Fixed
 626
 627 - Fix message between main worker and worker type definition for tasks.
 628 - Fix code documentation.
 629
 630 ## [2.4.7] - 2023-04-11
 631
 632 ### Added
 633
 634 - Add worker tasks queue options to pool options.
 635
 636 ### Fixed
 637
 638 - Fix missing documentation.
 639
 640 ## [2.4.6] - 2023-04-10
 641
 642 ### Fixed
 643
 644 - Ensure one task at a time is executed per worker with tasks queueing enabled.
 645 - Properly count worker executing tasks with tasks queueing enabled.
 646
 647 ## [2.4.5] - 2023-04-09
 648
 649 ### Added
 650
 651 - Use monotonic high resolution timer for worker tasks runtime.
 652 - Add worker tasks median runtime to statistics.
 653 - Add worker tasks queue (experimental).
 654
 655 ## [2.4.4] - 2023-04-07
 656
 657 ### Added
 658
 659 - Add `PoolEvents` enumeration and `PoolEvent` type.
 660
 661 ### Fixed
 662
 663 - Destroy worker only on alive check.
 664
 665 ## [2.4.3] - 2023-04-07
 666
 667 ### Fixed
 668
 669 - Fix typedoc generation with inheritance.
 670
 671 ## [2.4.2] - 2023-04-06
 672
 673 ### Added
 674
 675 - Add `full` event to dynamic pool.
 676 - Keep worker choice strategy in memory for conditional reuse.
 677
 678 ### Fixed
 679
 680 - Fix possible negative worker key at worker removal in worker choice strategies.
 681
 682 ## [2.4.1] - 2023-04-05
 683
 684 ### Changed
 685
 686 - Optimize worker choice strategy for dynamic pool.
 687
 688 ### Fixed
 689
 690 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
 691
 692 ## [2.4.0] - 2023-04-04
 693
 694 ### Added
 695
 696 - Add `LESS_BUSY` worker choice strategy.
 697
 698 ### Changed
 699
 700 - Optimize worker storage in pool.
 701 - Optimize worker alive status check.
 702 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
 703 - Optimize `LESS_USED` worker choice strategy.
 704 - Update benchmark versus external threads pools.
 705 - Optimize tasks usage statistics requirements for worker choice strategy.
 706
 707 ### Fixed
 708
 709 - Ensure trimmable characters are checked at pool initialization.
 710 - Fix message id integer overflow.
 711 - Fix pool worker removal in worker choice strategy internals.
 712 - Fix package publication with pnpm.
 713
 714 ## [2.4.0-3] - 2023-04-04
 715
 716 ### Added
 717
 718 - Add `LESS_BUSY` worker choice strategy.
 719
 720 ### Changed
 721
 722 - Optimize worker storage in pool.
 723 - Optimize worker alive status check.
 724 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
 725 - Optimize `LESS_USED` worker choice strategy.
 726 - Update benchmark versus external threads pools.
 727
 728 ### Fixed
 729
 730 - Ensure trimmable characters are checked at pool initialization.
 731 - Fix message id integer overflow.
 732 - Fix pool worker removal in worker choice strategy internals.
 733 - Fix package publication with pnpm.
 734
 735 ## [2.4.0-2] - 2023-04-03
 736
 737 ### Added
 738
 739 - Add `LESS_BUSY` worker choice strategy.
 740
 741 ### Changed
 742
 743 - Optimize worker storage in pool.
 744 - Optimize worker alive status check.
 745 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
 746 - Optimize `LESS_USED` worker choice strategy.
 747
 748 ### Fixed
 749
 750 - Ensure trimmable characters are checked at pool initialization.
 751 - Fix message id integer overflow.
 752 - Fix pool worker removal in worker choice strategy internals.
 753 - Fix package publication with pnpm.
 754
 755 ## [2.4.0-1] - 2023-04-03
 756
 757 ### Added
 758
 759 - Add `LESS_BUSY` worker choice strategy.
 760
 761 ### Changed
 762
 763 - Optimize worker storage in pool.
 764 - Optimize worker alive status check.
 765 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
 766 - Optimize `LESS_USED` worker choice strategy.
 767
 768 ### Fixed
 769
 770 - Ensure trimmable characters are checked at pool initialization.
 771 - Fix message id integer overflow.
 772 - Fix pool worker removal in worker choice strategy internals.
 773
 774 ## [2.4.0-0] - 2023-04-03
 775
 776 ### Added
 777
 778 - Add `LESS_BUSY` worker choice strategy.
 779
 780 ### Changed
 781
 782 - Optimize worker storage in pool.
 783 - Optimize worker alive status check.
 784 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
 785 - Optimize `LESS_USED` worker choice strategy.
 786
 787 ### Fixed
 788
 789 - Ensure trimmable characters are checked at pool initialization.
 790 - Fix message id integer overflow.
 791 - Fix pool worker removal in worker choice strategy internals.
 792
 793 ## [2.3.10] - 2023-03-18
 794
 795 ### Fixed
 796
 797 - Fix package.json `exports` syntax for ESM and CommonJS.
 798
 799 ### Changed
 800
 801 - Permit SemVer pre-release publication.
 802
 803 ## [2.3.10-2] - 2023-03-18
 804
 805 ### Fixed
 806
 807 - Fix package.json `exports` syntax for ESM and CommonJS.
 808
 809 ## [2.3.10-1] - 2023-03-18
 810
 811 ### Changed
 812
 813 - Permit SemVer pre-release publication.
 814
 815 ## [2.3.10-0] - 2023-03-18
 816
 817 ### Fixed
 818
 819 - Fix package.json `exports` syntax for ESM and CommonJS.
 820
 821 ## [2.3.9] - 2023-03-18
 822
 823 ### Changed
 824
 825 - Introduce ESM module support along with CommonJS one.
 826
 827 ### Fixed
 828
 829 - Fix brown paper bag bug referencing the same object literal.
 830
 831 ## [2.3.8] - 2023-03-18
 832
 833 ### Changed
 834
 835 - Switch internal benchmarking code to benny.
 836 - Switch to TypeScript 5.x.x.
 837 - Switch rollup bundler plugins to core ones.
 838 - Switch to TSDoc syntax.
 839 - Enforce conventional commits.
 840
 841 ### Fixed
 842
 843 - Fix random integer generator.
 844 - Fix worker choice strategy pool type identification at initialization.
 845
 846 ## [2.3.7] - 2022-10-23
 847
 848 ### Changed
 849
 850 - Switch to open collective FOSS project funding platform.
 851 - Switch to ts-standard linter configuration on TypeScript code.
 852
 853 ### Fixed
 854
 855 - Fixed missing async on pool execute method.
 856 - Fixed typing in TypeScript example.
 857 - Fixed types in unit tests.
 858
 859 ## [2.3.6] - 2022-10-22
 860
 861 ### Changed
 862
 863 - Cleanup pool attributes and methods.
 864 - Refine error types thrown.
 865
 866 ### Fixed
 867
 868 - Fix continuous integration build on windows.
 869 - Fix code coverage reporting by using c8 instead of nyc.
 870
 871 ## [2.3.5] - 2022-10-21
 872
 873 ### Changed
 874
 875 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
 876 - Optimize tasks usage lookup implementation.
 877
 878 ### Fixed
 879
 880 - Fix missed pool event emitter type export.
 881 - Fix typedoc documentation generation.
 882
 883 ## [2.3.4] - 2022-10-17
 884
 885 ### Added
 886
 887 - Fully automate release process with release-it.
 888
 889 ### Changed
 890
 891 - Optimize fair share task scheduling algorithm implementation.
 892 - Update benchmark versus external pools results with latest version.
 893
 894 ## [2.3.3] - 2022-10-15
 895
 896 ### Added
 897
 898 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
 899
 900 ## [2.3.2] - 2022-10-14
 901
 902 ### Changed
 903
 904 - Optimize fair share worker selection strategy implementation.
 905
 906 ### Fixed
 907
 908 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
 909
 910 ## [2.3.1] - 2022-10-13
 911
 912 ### Added
 913
 914 - Pool worker choice strategies:
 915   - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
 916   - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
 917
 918 ## [2.2.2] - 2022-10-09
 919
 920 ### Fixed
 921
 922 - Fixed `README.md` file.
 923
 924 ## [2.2.1] - 2022-10-08
 925
 926 ### Added
 927
 928 - Dynamic worker choice strategy change at runtime.
 929
 930 ## [2.2.0] - 2022-01-05
 931
 932 ### Breaking Changes
 933
 934 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
 935
 936 ## [2.1.0] - 2021-08-29
 937
 938 ### Added
 939
 940 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
 941
 942 ### Breaking Changes
 943
 944 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
 945 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
 946 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
 947 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
 948
 949 ## [2.0.2] - 2021-05-12
 950
 951 ### Bug fixes
 952
 953 - Fix `busy` event emission on fixed pool type
 954
 955 ## [2.0.1] - 2021-03-16
 956
 957 ### Bug fixes
 958
 959 - Check if pool options are properly set.
 960 - `busy` event is emitted on all pool types.
 961
 962 ## [2.0.0] - 2021-03-01
 963
 964 ### Bug fixes
 965
 966 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
 967
 968 ### Breaking Changes
 969
 970 - `FullPool` event is now renamed to `busy`.
 971 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
 972   _Find more details on our JSDoc._
 973
 974 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
 975
 976 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
 977
 978 ### Pool options types declaration merge
 979
 980 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
 981
 982 #### New `export` strategy
 983
 984 ```js
 985 // Before
 986 const DynamicThreadPool = require('poolifier/lib/dynamic')
 987 // After
 988 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
 989 ```
 990
 991 But you should always prefer just using
 992
 993 ```js
 994 const { DynamicThreadPool } = require('poolifier')
 995 ```
 996
 997 #### New type definitions for input data and response
 998
 999 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1000 _This is not a limitation by poolifier but Node.js._
1001
1002 #### Public property replacements
1003
1004 `numWorkers` property is now `numberOfWorkers`
1005
1006 #### Internal (protected) properties and methods renaming
1007
1008 These properties are not intended for end users
1009
1010 - `id` => `nextMessageId`
1011
1012 These methods are not intended for end users
1013
1014 - `_chooseWorker` => `chooseWorker`
1015 - `_newWorker` => `createWorker`
1016 - `_execute` => `internalExecute`
1017 - `_chooseWorker` => `chooseWorker`
1018 - `_checkAlive` => `checkAlive`
1019 - `_run` => `run`
1020 - `_runAsync` => `runAsync`
1021
1022 ## [1.1.0] - 2020-05-21
1023
1024 ### Added
1025
1026 - ThreadWorker support async functions as option
1027 - Various external library patches
1028
1029 ## [1.0.0] - 2020-01-24
1030
1031 ### Added
1032
1033 - FixedThreadPool implementation
1034 - DynamicThreadPool implementation
1035 - WorkerThread implementation to improve developer experience