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 ## [3.0.4] - 2023-10-20
  11
  12 ### Changed
  13
  14 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
  15 - Use builtin retry mechanism in worker choice strategies instead of custom one.
  16
  17 ## [3.0.3] - 2023-10-19
  18
  19 ### Fixed
  20
  21 - Avoid null exception at sending message to worker.
  22 - Avoid null exception at checking worker node readiness.
  23
  24 ## [3.0.2] - 2023-10-17
  25
  26 ### Fixed
  27
  28 - Fix race condition at dynamic worker node task assignment and scheduled removal. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468) and [#1496](https://github.com/poolifier/poolifier/issues/1496).
  29
  30 ## [3.0.1] - 2023-10-16
  31
  32 ### Fixed
  33
  34 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
  35
  36 ### Changed
  37
  38 - Switch the worker node eventing code to `EventTarget` API.
  39
  40 ## [3.0.0] - 2023-10-08
  41
  42 ### Changed
  43
  44 - Remove Node.js 16.x.x (EOL) support.
  45
  46 ## [2.7.5] - 2023-10-03
  47
  48 ### Changed
  49
  50 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
  51
  52 ## [2.7.4] - 2023-09-25
  53
  54 ### Fixed
  55
  56 - Fix source maps (bundler issue).
  57
  58 ## [2.7.3] - 2023-09-24
  59
  60 ### Changed
  61
  62 - Convert pool event emitter to event emitter async resource.
  63
  64 ## [2.7.2] - 2023-09-23
  65
  66 ### Changed
  67
  68 - Add source maps to npm package to ease debugging.
  69
  70 ### Added
  71
  72 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
  73
  74 ## [2.7.1] - 2023-09-20
  75
  76 ### Fixed
  77
  78 - Ensure worker message listener used one time are removed after usage.
  79
  80 ## [2.7.0] - 2023-09-19
  81
  82 ### Fixed
  83
  84 - Fix task stealing related tasks queue options handling at runtime.
  85
  86 ### Changed
  87
  88 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
  89
  90 ### Added
  91
  92 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
  93 - Stricter worker constructor arguments validation.
  94
  95 ## [2.6.45] - 2023-09-17
  96
  97 ### Changed
  98
  99 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
 100
 101 ### Added
 102
 103 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
 104 - Add `start()` method to pool API to start the minimum number of workers.
 105 - 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.
 106 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
 107
 108 ## [2.6.44] - 2023-09-08
 109
 110 ### Fixed
 111
 112 - Use a dedicated PAT to publish on GitHub packages registry.
 113
 114 ### Added
 115
 116 - Publish on GitHub packages registry on release.
 117
 118 ### Changed
 119
 120 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
 121
 122 ## [2.6.43] - 2023-09-08
 123
 124 ### Added
 125
 126 - Publish on GitHub packages registry on release.
 127
 128 ### Changed
 129
 130 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
 131
 132 ## [2.6.42] - 2023-09-06
 133
 134 ### Changed
 135
 136 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
 137
 138 ## [2.6.41] - 2023-09-03
 139
 140 ### Changed
 141
 142 - Optimize worker choice strategies implementation.
 143
 144 ## [2.6.40] - 2023-09-01
 145
 146 ### Fixed
 147
 148 - Do not pre-choose in WRR worker choice strategy to avoid bias.
 149 - Avoid array out of bound in worker choice strategies after worker node removal.
 150
 151 ## [2.6.39] - 2023-08-30
 152
 153 ### Fixed
 154
 155 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
 156
 157 ## [2.6.38] - 2023-08-30
 158
 159 ### Added
 160
 161 - Bundle typescript types declaration into one file.
 162
 163 ### Changed
 164
 165 - Improve interleaved weighted round robin worker choice strategy implementation.
 166
 167 ## [2.6.37] - 2023-08-28
 168
 169 ### Fixed
 170
 171 - Ensure unused worker usage statistics are deleted at runtime.
 172
 173 ### Changed
 174
 175 - Rename worker choice strategy options `choiceRetries` to `retries`.
 176 - Avoid unnecessary branching in worker choice strategies.
 177
 178 ## [2.6.36] - 2023-08-27
 179
 180 ### Fixed
 181
 182 - Fix pool `execute()` arguments check.
 183
 184 ### Changed
 185
 186 - Make continuous tasks stealing algorithm less aggressive.
 187 - Fine tune tasks stealing algorithm under back pressure.
 188
 189 ## [2.6.35] - 2023-08-25
 190
 191 ### Fixed
 192
 193 - Don't account worker usage statistics for tasks that have failed.
 194 - Fix pool information runtime and wait time median computation.
 195
 196 ### Changed
 197
 198 - Update simple moving average implementation to use a circular buffer.
 199 - Update simple moving median implementation to use a circular buffer.
 200 - Account for stolen tasks in worker usage statistics and pool information.
 201
 202 ### Added
 203
 204 - Continuous tasks stealing algorithm.
 205
 206 ## [2.6.34] - 2023-08-24
 207
 208 ### Fixes
 209
 210 - Avoid cascading tasks stealing under back pressure.
 211
 212 ### Changed
 213
 214 - Add fastpath to queued tasks rescheduling.
 215
 216 ## [2.6.33] - 2023-08-24
 217
 218 ### Fixed
 219
 220 - Fix queued tasks rescheduling.
 221
 222 ### Changed
 223
 224 - Rename tasks queue options `queueMaxSize` to `size`.
 225
 226 ### Added
 227
 228 - Task stealing scheduling algorithm if tasks queueing is enabled.
 229
 230 ## [2.6.32] - 2023-08-23
 231
 232 ### Fixed
 233
 234 - Ensure no task can be executed when the pool is destroyed.
 235
 236 ### Added
 237
 238 - Add `queueMaxSize` option to tasks queue options.
 239 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
 240 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
 241
 242 ## [2.6.31] - 2023-08-20
 243
 244 ### Fixed
 245
 246 - Fix worker choice strategy retries mechanism in some edge cases.
 247
 248 ### Changed
 249
 250 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
 251 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
 252
 253 ## [2.6.30] - 2023-08-19
 254
 255 ### Fixed
 256
 257 - Ensure pool event `backPressure` is emitted.
 258 - Ensure pool event `full` is emitted only once.
 259 - Ensure worker node cannot be instantiated without proper arguments.
 260
 261 ## [2.6.29] - 2023-08-18
 262
 263 ### Fixed
 264
 265 - Fix race condition between ready and task functions worker message handling at startup.
 266 - Fix duplicate task function worker usage statistics computation per task function.
 267 - Update task function worker usage statistics if and only if there's at least two different task functions.
 268 - Fix race condition at task function worker usage executing task computation leading to negative value.
 269
 270 ### Added
 271
 272 - 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).
 273 - Use back pressure detection in worker choice strategies.
 274 - Add worker choice strategies retries mechanism if no worker is eligible.
 275
 276 ## [2.6.28] - 2023-08-16
 277
 278 ### Fixed
 279
 280 - Ensure pool workers are properly initialized.
 281
 282 ### Added
 283
 284 - HTTP server pool examples: express-cluster, express-hybrid.
 285
 286 ### Changed
 287
 288 - Remove now useless branching in worker hot code path.
 289
 290 ## [2.6.27] - 2023-08-15
 291
 292 ### Fixed
 293
 294 - Add `KillHandler` type definition to exported types.
 295
 296 ### Added
 297
 298 - Add `destroy` event to pool API.
 299
 300 ## [2.6.26] - 2023-08-15
 301
 302 ### Added
 303
 304 - Add kill handler to worker options allowing to execute custom code when worker is killed.
 305 - Add `listTaskFunctions()` method to pool API.
 306 - SMTP client pool example: nodemailer.
 307
 308 ## [2.6.25] - 2023-08-13
 309
 310 ### Added
 311
 312 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
 313 - WebSocket server pool examples: ws-cluster, ws-hybrid.
 314
 315 ## [2.6.24] - 2023-08-12
 316
 317 ### Added
 318
 319 - Add array of transferable objects to the `execute()` method arguments.
 320 - WebSocket server pool examples: ws-worker_threads.
 321
 322 ## [2.6.23] - 2023-08-11
 323
 324 ### Fixed
 325
 326 - 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.
 327
 328 ### Added
 329
 330 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
 331 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
 332
 333 ## [2.6.22] - 2023-08-10
 334
 335 ### Fixed
 336
 337 - Add missing `types` field to package.json `exports`.
 338
 339 ### Changed
 340
 341 - Structure markdown documentation (PR #811).
 342
 343 ## [2.6.21] - 2023-08-03
 344
 345 ### Changed
 346
 347 - Improve code documentation.
 348 - Code refactoring and cleanup for better maintainability and readability.
 349
 350 ## [2.6.20] - 2023-07-21
 351
 352 ### Fixed
 353
 354 - Fix queued tasks redistribution on error task execution starvation.
 355 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
 356
 357 ### Changed
 358
 359 - Drastically reduce lookups by worker in the worker nodes.
 360
 361 ## [2.6.19] - 2023-07-20
 362
 363 ### Added
 364
 365 - Dedicated internal communication channel for worker_threads pools.
 366
 367 ## [2.6.18] - 2023-07-19
 368
 369 ### Changed
 370
 371 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
 372
 373 ## [2.6.17] - 2023-07-16
 374
 375 ### Added
 376
 377 - Add `listTaskFunctions()` method to worker API.
 378
 379 ## [2.6.16] - 2023-07-12
 380
 381 ### Fixed
 382
 383 - Fix pool startup detection.
 384 - Fix worker task functions handling.
 385
 386 ## [2.6.15] - 2023-07-11
 387
 388 ### Added
 389
 390 - Take into account worker node readiness in worker choice strategies.
 391
 392 ## [2.6.14] - 2023-07-10
 393
 394 ### Fixed
 395
 396 - Fix task function statistics tracking.
 397
 398 ## [2.6.13] - 2023-07-10
 399
 400 ### Added
 401
 402 - Add per task function statistics tracking.
 403 - Add public methods to manipulate the worker task functions at runtime.
 404
 405 ## [2.6.12] - 2023-07-09
 406
 407 ### Fixed
 408
 409 - Workaround import issue with `node:os` module in node 16.x.x.
 410
 411 ## [2.6.11] - 2023-07-09
 412
 413 ### Fixed
 414
 415 - Fix pool readiness semantic.
 416
 417 ## [2.6.10] - 2023-07-08
 418
 419 ### Fixed
 420
 421 - Ensure workers are not recreated on error at pool startup.
 422
 423 ### Added
 424
 425 - Add `ready` and `strategy` fields to pool information.
 426 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
 427 - Add dynamic pool sizing checks.
 428
 429 ## [2.6.9] - 2023-07-07
 430
 431 ### Fixed
 432
 433 - Recreate the right worker type on uncaught exception.
 434
 435 ### Added
 436
 437 - Add minimum and maximum to internal measurement statistics.
 438 - Add `runTime` and `waitTime` to pool information.
 439 - Check worker inactive time only on dynamic worker.
 440
 441 ## [2.6.8] - 2023-07-03
 442
 443 ### Fixed
 444
 445 - Brown paper bag release to fix version handling in pool information.
 446
 447 ## [2.6.7] - 2023-07-03
 448
 449 ### Fixed
 450
 451 - Ensure worker queued tasks at error are reassigned to other pool workers.
 452
 453 ### Added
 454
 455 - Add pool `utilization` ratio to pool information.
 456 - Add `version` to pool information.
 457 - Add worker information to worker nodes.
 458
 459 ## [2.6.6] - 2023-07-01
 460
 461 ### Added
 462
 463 - Add safe helper `availableParallelism()` to help sizing the pool.
 464
 465 ### Fixed
 466
 467 - Ensure message handler is only registered in worker.
 468
 469 ## [2.6.5] - 2023-06-27
 470
 471 ### Known issues
 472
 473 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
 474
 475 ### Fixed
 476
 477 - Artificial version bump to 2.6.5 to workaround publication issue.
 478 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
 479 - Ensure pool event is emitted before task error promise rejection.
 480 - Fix queued tasks count computation.
 481
 482 ### Removed
 483
 484 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
 485
 486 ## [2.6.4] - 2023-06-27
 487
 488 ### Known issues
 489
 490 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
 491
 492 ### Fixed
 493
 494 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
 495 - Ensure pool event is emitted before task error promise rejection.
 496 - Fix queued tasks count computation.
 497
 498 ### Removed
 499
 500 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
 501
 502 ## [2.6.3] - 2023-06-19
 503
 504 ### Fixed
 505
 506 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
 507 - Update strategies internals after statistics computation.
 508
 509 ### Changed
 510
 511 - Optimize O(1) queue implementation.
 512
 513 ## [2.6.2] - 2023-06-12
 514
 515 ### Fixed
 516
 517 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
 518
 519 ## [2.6.1] - 2023-06-10
 520
 521 ### Added
 522
 523 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
 524
 525 ### Fixed
 526
 527 - Fix average statistics computation: ensure failed tasks are not accounted.
 528
 529 ## [2.6.0] - 2023-06-09
 530
 531 ### Added
 532
 533 - Add `LEAST_ELU` worker choice strategy (experimental).
 534 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
 535
 536 ### Changed
 537
 538 - Refactor pool worker node usage internals.
 539 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
 540 - Breaking change: pool information `info` property object fields have been renamed.
 541
 542 ### Fixed
 543
 544 - Fix wait time accounting.
 545 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
 546 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
 547
 548 ## [2.5.4] - 2023-06-07
 549
 550 ### Added
 551
 552 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
 553
 554 ### Changed
 555
 556 - Compute statistics at the worker level only if needed.
 557 - Add `worker_threads` options to thread pool options.
 558
 559 ### Fixed
 560
 561 - Make the `LEAST_BUSY` strategy only relies on task runtime.
 562
 563 ## [2.5.3] - 2023-06-04
 564
 565 ### Changed
 566
 567 - Refine pool information content.
 568 - Limit pool internals public exposure.
 569
 570 ## [2.5.2] - 2023-06-02
 571
 572 ### Added
 573
 574 - Add `taskError` pool event for task execution error.
 575 - Add pool information `info` property to pool.
 576 - Emit pool information on `busy` and `full` pool events.
 577
 578 ## [2.5.1] - 2023-06-01
 579
 580 ### Added
 581
 582 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
 583 - Add `error` pool event for uncaught worker error.
 584
 585 ## [2.5.0] - 2023-05-31
 586
 587 ### Added
 588
 589 - Switch pool event emitter to `EventEmitterAsyncResource`.
 590 - Add tasks wait time accounting in per worker tasks usage.
 591 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
 592
 593 ### Changed
 594
 595 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
 596
 597 ## [2.4.14] - 2023-05-09
 598
 599 ### Fixed
 600
 601 - Ensure no undefined task runtime can land in the tasks history.
 602 - Fix median computation implementation once again.
 603
 604 ### Added
 605
 606 - Unit tests for median and queue implementations.
 607
 608 ## [2.4.13] - 2023-05-08
 609
 610 ### Fixed
 611
 612 - Fix worker choice strategy options validation.
 613 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
 614
 615 ## [2.4.12] - 2023-05-06
 616
 617 ### Added
 618
 619 - Support multiple task functions per worker.
 620 - Add custom worker weights support to worker choice strategies options.
 621
 622 ### Changed
 623
 624 - Use O(1) queue implementation for tasks queueing.
 625
 626 ### Fixed
 627
 628 - Fix median computation implementation.
 629 - Fix fair share worker choice strategy internals update.
 630
 631 ## [2.4.11] - 2023-04-23
 632
 633 ### Changed
 634
 635 - Optimize free worker finding in worker choice strategies.
 636
 637 ## [2.4.10] - 2023-04-15
 638
 639 ### Fixed
 640
 641 - Fix typescript type definition for task function: ensure the input data is optional.
 642 - Fix typescript type definition for pool execute(): ensure the input data is optional.
 643
 644 ## [2.4.9] - 2023-04-15
 645
 646 ### Added
 647
 648 - Add tasks queue enablement runtime setter to pool.
 649 - Add tasks queue options runtime setter to pool.
 650 - Add worker choice strategy options runtime setter to pool.
 651
 652 ### Changed
 653
 654 - Remove the tasks queuing experimental status.
 655
 656 ### Fixed
 657
 658 - Fix task function type definition and validation.
 659 - Fix worker choice strategy options handling.
 660
 661 ## [2.4.8] - 2023-04-12
 662
 663 ### Fixed
 664
 665 - Fix message between main worker and worker type definition for tasks.
 666 - Fix code documentation.
 667
 668 ## [2.4.7] - 2023-04-11
 669
 670 ### Added
 671
 672 - Add worker tasks queue options to pool options.
 673
 674 ### Fixed
 675
 676 - Fix missing documentation.
 677
 678 ## [2.4.6] - 2023-04-10
 679
 680 ### Fixed
 681
 682 - Ensure one task at a time is executed per worker with tasks queueing enabled.
 683 - Properly count worker executing tasks with tasks queueing enabled.
 684
 685 ## [2.4.5] - 2023-04-09
 686
 687 ### Added
 688
 689 - Use monotonic high resolution timer for worker tasks runtime.
 690 - Add worker tasks median runtime to statistics.
 691 - Add worker tasks queue (experimental).
 692
 693 ## [2.4.4] - 2023-04-07
 694
 695 ### Added
 696
 697 - Add `PoolEvents` enumeration and `PoolEvent` type.
 698
 699 ### Fixed
 700
 701 - Destroy worker only on alive check.
 702
 703 ## [2.4.3] - 2023-04-07
 704
 705 ### Fixed
 706
 707 - Fix typedoc generation with inheritance.
 708
 709 ## [2.4.2] - 2023-04-06
 710
 711 ### Added
 712
 713 - Add `full` event to dynamic pool.
 714 - Keep worker choice strategy in memory for conditional reuse.
 715
 716 ### Fixed
 717
 718 - Fix possible negative worker key at worker removal in worker choice strategies.
 719
 720 ## [2.4.1] - 2023-04-05
 721
 722 ### Changed
 723
 724 - Optimize worker choice strategy for dynamic pool.
 725
 726 ### Fixed
 727
 728 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
 729
 730 ## [2.4.0] - 2023-04-04
 731
 732 ### Added
 733
 734 - Add `LESS_BUSY` worker choice strategy.
 735
 736 ### Changed
 737
 738 - Optimize worker storage in pool.
 739 - Optimize worker alive status check.
 740 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
 741 - Optimize `LESS_USED` worker choice strategy.
 742 - Update benchmark versus external threads pools.
 743 - Optimize tasks usage statistics requirements for worker choice strategy.
 744
 745 ### Fixed
 746
 747 - Ensure trimmable characters are checked at pool initialization.
 748 - Fix message id integer overflow.
 749 - Fix pool worker removal in worker choice strategy internals.
 750 - Fix package publication with pnpm.
 751
 752 ## [2.4.0-3] - 2023-04-04
 753
 754 ### Added
 755
 756 - Add `LESS_BUSY` worker choice strategy.
 757
 758 ### Changed
 759
 760 - Optimize worker storage in pool.
 761 - Optimize worker alive status check.
 762 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
 763 - Optimize `LESS_USED` worker choice strategy.
 764 - Update benchmark versus external threads pools.
 765
 766 ### Fixed
 767
 768 - Ensure trimmable characters are checked at pool initialization.
 769 - Fix message id integer overflow.
 770 - Fix pool worker removal in worker choice strategy internals.
 771 - Fix package publication with pnpm.
 772
 773 ## [2.4.0-2] - 2023-04-03
 774
 775 ### Added
 776
 777 - Add `LESS_BUSY` worker choice strategy.
 778
 779 ### Changed
 780
 781 - Optimize worker storage in pool.
 782 - Optimize worker alive status check.
 783 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
 784 - Optimize `LESS_USED` worker choice strategy.
 785
 786 ### Fixed
 787
 788 - Ensure trimmable characters are checked at pool initialization.
 789 - Fix message id integer overflow.
 790 - Fix pool worker removal in worker choice strategy internals.
 791 - Fix package publication with pnpm.
 792
 793 ## [2.4.0-1] - 2023-04-03
 794
 795 ### Added
 796
 797 - Add `LESS_BUSY` worker choice strategy.
 798
 799 ### Changed
 800
 801 - Optimize worker storage in pool.
 802 - Optimize worker alive status check.
 803 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
 804 - Optimize `LESS_USED` worker choice strategy.
 805
 806 ### Fixed
 807
 808 - Ensure trimmable characters are checked at pool initialization.
 809 - Fix message id integer overflow.
 810 - Fix pool worker removal in worker choice strategy internals.
 811
 812 ## [2.4.0-0] - 2023-04-03
 813
 814 ### Added
 815
 816 - Add `LESS_BUSY` worker choice strategy.
 817
 818 ### Changed
 819
 820 - Optimize worker storage in pool.
 821 - Optimize worker alive status check.
 822 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
 823 - Optimize `LESS_USED` worker choice strategy.
 824
 825 ### Fixed
 826
 827 - Ensure trimmable characters are checked at pool initialization.
 828 - Fix message id integer overflow.
 829 - Fix pool worker removal in worker choice strategy internals.
 830
 831 ## [2.3.10] - 2023-03-18
 832
 833 ### Fixed
 834
 835 - Fix package.json `exports` syntax for ESM and CommonJS.
 836
 837 ### Changed
 838
 839 - Permit SemVer pre-release publication.
 840
 841 ## [2.3.10-2] - 2023-03-18
 842
 843 ### Fixed
 844
 845 - Fix package.json `exports` syntax for ESM and CommonJS.
 846
 847 ## [2.3.10-1] - 2023-03-18
 848
 849 ### Changed
 850
 851 - Permit SemVer pre-release publication.
 852
 853 ## [2.3.10-0] - 2023-03-18
 854
 855 ### Fixed
 856
 857 - Fix package.json `exports` syntax for ESM and CommonJS.
 858
 859 ## [2.3.9] - 2023-03-18
 860
 861 ### Changed
 862
 863 - Introduce ESM module support along with CommonJS one.
 864
 865 ### Fixed
 866
 867 - Fix brown paper bag bug referencing the same object literal.
 868
 869 ## [2.3.8] - 2023-03-18
 870
 871 ### Changed
 872
 873 - Switch internal benchmarking code to benny.
 874 - Switch to TypeScript 5.x.x.
 875 - Switch rollup bundler plugins to core ones.
 876 - Switch to TSDoc syntax.
 877 - Enforce conventional commits.
 878
 879 ### Fixed
 880
 881 - Fix random integer generator.
 882 - Fix worker choice strategy pool type identification at initialization.
 883
 884 ## [2.3.7] - 2022-10-23
 885
 886 ### Changed
 887
 888 - Switch to open collective FOSS project funding platform.
 889 - Switch to ts-standard linter configuration on TypeScript code.
 890
 891 ### Fixed
 892
 893 - Fixed missing async on pool execute method.
 894 - Fixed typing in TypeScript example.
 895 - Fixed types in unit tests.
 896
 897 ## [2.3.6] - 2022-10-22
 898
 899 ### Changed
 900
 901 - Cleanup pool attributes and methods.
 902 - Refine error types thrown.
 903
 904 ### Fixed
 905
 906 - Fix continuous integration build on windows.
 907 - Fix code coverage reporting by using c8 instead of nyc.
 908
 909 ## [2.3.5] - 2022-10-21
 910
 911 ### Changed
 912
 913 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
 914 - Optimize tasks usage lookup implementation.
 915
 916 ### Fixed
 917
 918 - Fix missed pool event emitter type export.
 919 - Fix typedoc documentation generation.
 920
 921 ## [2.3.4] - 2022-10-17
 922
 923 ### Added
 924
 925 - Fully automate release process with release-it.
 926
 927 ### Changed
 928
 929 - Optimize fair share task scheduling algorithm implementation.
 930 - Update benchmark versus external pools results with latest version.
 931
 932 ## [2.3.3] - 2022-10-15
 933
 934 ### Added
 935
 936 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
 937
 938 ## [2.3.2] - 2022-10-14
 939
 940 ### Changed
 941
 942 - Optimize fair share worker selection strategy implementation.
 943
 944 ### Fixed
 945
 946 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
 947
 948 ## [2.3.1] - 2022-10-13
 949
 950 ### Added
 951
 952 - Pool worker choice strategies:
 953   - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
 954   - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
 955
 956 ## [2.2.2] - 2022-10-09
 957
 958 ### Fixed
 959
 960 - Fixed `README.md` file.
 961
 962 ## [2.2.1] - 2022-10-08
 963
 964 ### Added
 965
 966 - Dynamic worker choice strategy change at runtime.
 967
 968 ## [2.2.0] - 2022-01-05
 969
 970 ### Breaking Changes
 971
 972 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
 973
 974 ## [2.1.0] - 2021-08-29
 975
 976 ### Added
 977
 978 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
 979
 980 ### Breaking Changes
 981
 982 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
 983 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
 984 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
 985 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
 986
 987 ## [2.0.2] - 2021-05-12
 988
 989 ### Bug fixes
 990
 991 - Fix `busy` event emission on fixed pool type
 992
 993 ## [2.0.1] - 2021-03-16
 994
 995 ### Bug fixes
 996
 997 - Check if pool options are properly set.
 998 - `busy` event is emitted on all pool types.
 999
1000 ## [2.0.0] - 2021-03-01
1001
1002 ### Bug fixes
1003
1004 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1005
1006 ### Breaking Changes
1007
1008 - `FullPool` event is now renamed to `busy`.
1009 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1010   _Find more details on our JSDoc._
1011
1012 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1013
1014 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1015
1016 ### Pool options types declaration merge
1017
1018 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1019
1020 #### New `export` strategy
1021
1022 ```js
1023 // Before
1024 const DynamicThreadPool = require('poolifier/lib/dynamic')
1025 // After
1026 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1027 ```
1028
1029 But you should always prefer just using
1030
1031 ```js
1032 const { DynamicThreadPool } = require('poolifier')
1033 ```
1034
1035 #### New type definitions for input data and response
1036
1037 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1038 _This is not a limitation by poolifier but Node.js._
1039
1040 #### Public property replacements
1041
1042 `numWorkers` property is now `numberOfWorkers`
1043
1044 #### Internal (protected) properties and methods renaming
1045
1046 These properties are not intended for end users
1047
1048 - `id` => `nextMessageId`
1049
1050 These methods are not intended for end users
1051
1052 - `_chooseWorker` => `chooseWorker`
1053 - `_newWorker` => `createWorker`
1054 - `_execute` => `internalExecute`
1055 - `_chooseWorker` => `chooseWorker`
1056 - `_checkAlive` => `checkAlive`
1057 - `_run` => `run`
1058 - `_runAsync` => `runAsync`
1059
1060 ## [1.1.0] - 2020-05-21
1061
1062 ### Added
1063
1064 - ThreadWorker support async functions as option
1065 - Various external library patches
1066
1067 ## [1.0.0] - 2020-01-24
1068
1069 ### Added
1070
1071 - FixedThreadPool implementation
1072 - DynamicThreadPool implementation
1073 - WorkerThread implementation to improve developer experience