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