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