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