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