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