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