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