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