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