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 ### Added
  11
  12 - Add `queueMaxSize` option to tasks queue options.
  13
  14 ## [2.6.31] - 2023-08-20
  15
  16 ### Fixed
  17
  18 - Fix worker choice strategy retries mechanism in some edge cases.
  19
  20 ### Changed
  21
  22 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
  23 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
  24
  25 ## [2.6.30] - 2023-08-19
  26
  27 ### Fixed
  28
  29 - Ensure pool event `backPressure` is emitted.
  30 - Ensure pool event `full` is emitted only once.
  31 - Ensure worker node cannot be instantiated without proper arguments.
  32
  33 ## [2.6.29] - 2023-08-18
  34
  35 ### Fixed
  36
  37 - Fix race condition between ready and task functions worker message handling at startup.
  38 - Fix duplicate task function worker usage statistics computation per task function.
  39 - Update task function worker usage statistics if and only if there's at least two different task functions.
  40 - Fix race condition at task function worker usage executing task computation leading to negative value.
  41
  42 ### Added
  43
  44 - 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).
  45 - Use back pressure detection in worker choice strategies.
  46 - Add worker choice strategies retries mechanism if no worker is eligible.
  47
  48 ## [2.6.28] - 2023-08-16
  49
  50 ### Fixed
  51
  52 - Ensure pool workers are properly initialized.
  53
  54 ### Added
  55
  56 - HTTP server pool examples: express-cluster, express-hybrid.
  57
  58 ### Changed
  59
  60 - Remove now useless branching in worker hot code path.
  61
  62 ## [2.6.27] - 2023-08-15
  63
  64 ### Fixed
  65
  66 - Add `KillHandler` type definition to exported types.
  67
  68 ### Added
  69
  70 - Add `destroy` event to pool API.
  71
  72 ## [2.6.26] - 2023-08-15
  73
  74 ### Added
  75
  76 - Add kill handler to worker options allowing to execute custom code when worker is killed.
  77 - Add `listTaskFunctions()` method to pool API.
  78 - SMTP server pool example: nodemailer.
  79
  80 ## [2.6.25] - 2023-08-13
  81
  82 ### Added
  83
  84 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
  85 - WebSocket server pool examples: ws-cluster, ws-hybrid.
  86
  87 ## [2.6.24] - 2023-08-12
  88
  89 ### Added
  90
  91 - Add array of transferable objects to the `execute()` method arguments.
  92 - WebSocket server pool examples: ws-worker_threads.
  93
  94 ## [2.6.23] - 2023-08-11
  95
  96 ### Fixed
  97
  98 - 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.
  99
 100 ### Added
 101
 102 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
 103 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
 104
 105 ## [2.6.22] - 2023-08-10
 106
 107 ### Fixed
 108
 109 - Add missing `types` field to package.json `exports`.
 110
 111 ### Changed
 112
 113 - Structure markdown documentation (PR #811).
 114
 115 ## [2.6.21] - 2023-08-03
 116
 117 ### Changed
 118
 119 - Improve code documentation.
 120 - Code refactoring and cleanup for better maintainability and readability.
 121
 122 ## [2.6.20] - 2023-07-21
 123
 124 ### Fixed
 125
 126 - Fix queued tasks redistribution on error task execution starvation.
 127 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
 128
 129 ### Changed
 130
 131 - Drastically reduce lookups by worker in the worker nodes.
 132
 133 ## [2.6.19] - 2023-07-20
 134
 135 ### Added
 136
 137 - Dedicated internal communication channel for worker_threads pools.
 138
 139 ## [2.6.18] - 2023-07-19
 140
 141 ### Changed
 142
 143 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
 144
 145 ## [2.6.17] - 2023-07-16
 146
 147 ### Added
 148
 149 - Add `listTaskFunctions()` method to worker API.
 150
 151 ## [2.6.16] - 2023-07-12
 152
 153 ### Fixed
 154
 155 - Fix pool startup detection.
 156 - Fix worker task functions handling.
 157
 158 ## [2.6.15] - 2023-07-11
 159
 160 ### Added
 161
 162 - Take into account worker node readiness in worker choice strategies.
 163
 164 ## [2.6.14] - 2023-07-10
 165
 166 ### Fixed
 167
 168 - Fix task function statistics tracking.
 169
 170 ## [2.6.13] - 2023-07-10
 171
 172 ### Added
 173
 174 - Add per task function statistics tracking.
 175 - Add public methods to manipulate the worker task functions at runtime.
 176
 177 ## [2.6.12] - 2023-07-09
 178
 179 ### Fixed
 180
 181 - Workaround import issue with `node:os` module in node 16.x.x.
 182
 183 ## [2.6.11] - 2023-07-09
 184
 185 ### Fixed
 186
 187 - Fix pool readiness semantic.
 188
 189 ## [2.6.10] - 2023-07-08
 190
 191 ### Fixed
 192
 193 - Ensure workers are not recreated on error at pool startup.
 194
 195 ### Added
 196
 197 - Add `ready` and `strategy` fields to pool information.
 198 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
 199 - Add dynamic pool sizing checks.
 200
 201 ## [2.6.9] - 2023-07-07
 202
 203 ### Fixed
 204
 205 - Recreate the right worker type on uncaught exception.
 206
 207 ### Added
 208
 209 - Add minimum and maximum to internal measurement statistics.
 210 - Add `runTime` and `waitTime` to pool information.
 211 - Check worker inactive time only on dynamic worker.
 212
 213 ## [2.6.8] - 2023-07-03
 214
 215 ### Fixed
 216
 217 - Brown paper bag release to fix version handling in pool information.
 218
 219 ## [2.6.7] - 2023-07-03
 220
 221 ### Fixed
 222
 223 - Ensure worker queued tasks at error are reassigned to other pool workers.
 224
 225 ### Added
 226
 227 - Add pool `utilization` ratio to pool information.
 228 - Add `version` to pool information.
 229 - Add worker information to worker nodes.
 230
 231 ## [2.6.6] - 2023-07-01
 232
 233 ### Added
 234
 235 - Add safe helper `availableParallelism()` to help sizing the pool.
 236
 237 ### Fixed
 238
 239 - Ensure message handler is only registered in worker.
 240
 241 ## [2.6.5] - 2023-06-27
 242
 243 ### Known issues
 244
 245 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
 246
 247 ### Fixed
 248
 249 - Artificial version bump to 2.6.5 to workaround publication issue.
 250 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
 251 - Ensure pool event is emitted before task error promise rejection.
 252 - Fix queued tasks count computation.
 253
 254 ### Removed
 255
 256 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
 257
 258 ## [2.6.4] - 2023-06-27
 259
 260 ### Known issues
 261
 262 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
 263
 264 ### Fixed
 265
 266 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
 267 - Ensure pool event is emitted before task error promise rejection.
 268 - Fix queued tasks count computation.
 269
 270 ### Removed
 271
 272 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
 273
 274 ## [2.6.3] - 2023-06-19
 275
 276 ### Fixed
 277
 278 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
 279 - Update strategies internals after statistics computation.
 280
 281 ### Changed
 282
 283 - Optimize O(1) queue implementation.
 284
 285 ## [2.6.2] - 2023-06-12
 286
 287 ### Fixed
 288
 289 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
 290
 291 ## [2.6.1] - 2023-06-10
 292
 293 ### Added
 294
 295 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
 296
 297 ### Fixed
 298
 299 - Fix average statistics computation: ensure failed tasks are not accounted.
 300
 301 ## [2.6.0] - 2023-06-09
 302
 303 ### Added
 304
 305 - Add `LEAST_ELU` worker choice strategy (experimental).
 306 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
 307
 308 ### Changed
 309
 310 - Refactor pool worker node usage internals.
 311 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
 312 - Breaking change: pool information `info` property object fields have been renamed.
 313
 314 ### Fixed
 315
 316 - Fix wait time accounting.
 317 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
 318 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
 319
 320 ## [2.5.4] - 2023-06-07
 321
 322 ### Added
 323
 324 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
 325
 326 ### Changed
 327
 328 - Compute statistics at the worker level only if needed.
 329 - Add `worker_threads` options to thread pool options.
 330
 331 ### Fixed
 332
 333 - Make the `LEAST_BUSY` strategy only relies on task runtime.
 334
 335 ## [2.5.3] - 2023-06-04
 336
 337 ### Changed
 338
 339 - Refine pool information content.
 340 - Limit pool internals public exposure.
 341
 342 ## [2.5.2] - 2023-06-02
 343
 344 ### Added
 345
 346 - Add `taskError` pool event for task execution error.
 347 - Add pool information `info` property to pool.
 348 - Emit pool information on `busy` and `full` pool events.
 349
 350 ## [2.5.1] - 2023-06-01
 351
 352 ### Added
 353
 354 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
 355 - Add `error` pool event for uncaught worker error.
 356
 357 ## [2.5.0] - 2023-05-31
 358
 359 ### Added
 360
 361 - Switch pool event emitter to `EventEmitterAsyncResource`.
 362 - Add tasks wait time accounting in per worker tasks usage.
 363 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
 364
 365 ### Changed
 366
 367 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
 368
 369 ## [2.4.14] - 2023-05-09
 370
 371 ### Fixed
 372
 373 - Ensure no undefined task runtime can land in the tasks history.
 374 - Fix median computation implementation once again.
 375
 376 ### Added
 377
 378 - Unit tests for median and queue implementations.
 379
 380 ## [2.4.13] - 2023-05-08
 381
 382 ### Fixed
 383
 384 - Fix worker choice strategy options validation.
 385 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
 386
 387 ## [2.4.12] - 2023-05-06
 388
 389 ### Added
 390
 391 - Support multiple task functions per worker.
 392 - Add custom worker weights support to worker choice strategies options.
 393
 394 ### Changed
 395
 396 - Use O(1) queue implementation for tasks queueing.
 397
 398 ### Fixed
 399
 400 - Fix median computation implementation.
 401 - Fix fair share worker choice strategy internals update.
 402
 403 ## [2.4.11] - 2023-04-23
 404
 405 ### Changed
 406
 407 - Optimize free worker finding in worker choice strategies.
 408
 409 ## [2.4.10] - 2023-04-15
 410
 411 ### Fixed
 412
 413 - Fix typescript type definition for task function: ensure the input data is optional.
 414 - Fix typescript type definition for pool execute(): ensure the input data is optional.
 415
 416 ## [2.4.9] - 2023-04-15
 417
 418 ### Added
 419
 420 - Add tasks queue enablement runtime setter to pool.
 421 - Add tasks queue options runtime setter to pool.
 422 - Add worker choice strategy options runtime setter to pool.
 423
 424 ### Changed
 425
 426 - Remove the tasks queuing experimental status.
 427
 428 ### Fixed
 429
 430 - Fix task function type definition and validation.
 431 - Fix worker choice strategy options handling.
 432
 433 ## [2.4.8] - 2023-04-12
 434
 435 ### Fixed
 436
 437 - Fix message between main worker and worker type definition for tasks.
 438 - Fix code documentation.
 439
 440 ## [2.4.7] - 2023-04-11
 441
 442 ### Added
 443
 444 - Add worker tasks queue options to pool options.
 445
 446 ### Fixed
 447
 448 - Fix missing documentation.
 449
 450 ## [2.4.6] - 2023-04-10
 451
 452 ### Fixed
 453
 454 - Ensure one task at a time is executed per worker with tasks queueing enabled.
 455 - Properly count worker executing tasks with tasks queueing enabled.
 456
 457 ## [2.4.5] - 2023-04-09
 458
 459 ### Added
 460
 461 - Use monotonic high resolution timer for worker tasks runtime.
 462 - Add worker tasks median runtime to statistics.
 463 - Add worker tasks queue (experimental).
 464
 465 ## [2.4.4] - 2023-04-07
 466
 467 ### Added
 468
 469 - Add `PoolEvents` enumeration and `PoolEvent` type.
 470
 471 ### Fixed
 472
 473 - Destroy worker only on alive check.
 474
 475 ## [2.4.3] - 2023-04-07
 476
 477 ### Fixed
 478
 479 - Fix typedoc generation with inheritance.
 480
 481 ## [2.4.2] - 2023-04-06
 482
 483 ### Added
 484
 485 - Add `full` event to dynamic pool.
 486 - Keep worker choice strategy in memory for conditional reuse.
 487
 488 ### Fixed
 489
 490 - Fix possible negative worker key at worker removal in worker choice strategies.
 491
 492 ## [2.4.1] - 2023-04-05
 493
 494 ### Changed
 495
 496 - Optimize worker choice strategy for dynamic pool.
 497
 498 ### Fixed
 499
 500 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
 501
 502 ## [2.4.0] - 2023-04-04
 503
 504 ### Added
 505
 506 - Add `LESS_BUSY` worker choice strategy.
 507
 508 ### Changed
 509
 510 - Optimize worker storage in pool.
 511 - Optimize worker alive status check.
 512 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
 513 - Optimize `LESS_USED` worker choice strategy.
 514 - Update benchmarks versus external threads pools.
 515 - Optimize tasks usage statistics requirements for worker choice strategy.
 516
 517 ### Fixed
 518
 519 - Ensure trimmable characters are checked at pool initialization.
 520 - Fix message id integer overflow.
 521 - Fix pool worker removal in worker choice strategy internals.
 522 - Fix package publication with pnpm.
 523
 524 ## [2.4.0-3] - 2023-04-04
 525
 526 ### Added
 527
 528 - Add `LESS_BUSY` worker choice strategy.
 529
 530 ### Changed
 531
 532 - Optimize worker storage in pool.
 533 - Optimize worker alive status check.
 534 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
 535 - Optimize `LESS_USED` worker choice strategy.
 536 - Update benchmarks versus external threads pools.
 537
 538 ### Fixed
 539
 540 - Ensure trimmable characters are checked at pool initialization.
 541 - Fix message id integer overflow.
 542 - Fix pool worker removal in worker choice strategy internals.
 543 - Fix package publication with pnpm.
 544
 545 ## [2.4.0-2] - 2023-04-03
 546
 547 ### Added
 548
 549 - Add `LESS_BUSY` worker choice strategy.
 550
 551 ### Changed
 552
 553 - Optimize worker storage in pool.
 554 - Optimize worker alive status check.
 555 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
 556 - Optimize `LESS_USED` worker choice strategy.
 557
 558 ### Fixed
 559
 560 - Ensure trimmable characters are checked at pool initialization.
 561 - Fix message id integer overflow.
 562 - Fix pool worker removal in worker choice strategy internals.
 563 - Fix package publication with pnpm.
 564
 565 ## [2.4.0-1] - 2023-04-03
 566
 567 ### Added
 568
 569 - Add `LESS_BUSY` worker choice strategy.
 570
 571 ### Changed
 572
 573 - Optimize worker storage in pool.
 574 - Optimize worker alive status check.
 575 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
 576 - Optimize `LESS_USED` worker choice strategy.
 577
 578 ### Fixed
 579
 580 - Ensure trimmable characters are checked at pool initialization.
 581 - Fix message id integer overflow.
 582 - Fix pool worker removal in worker choice strategy internals.
 583
 584 ## [2.4.0-0] - 2023-04-03
 585
 586 ### Added
 587
 588 - Add `LESS_BUSY` worker choice strategy.
 589
 590 ### Changed
 591
 592 - Optimize worker storage in pool.
 593 - Optimize worker alive status check.
 594 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
 595 - Optimize `LESS_USED` worker choice strategy.
 596
 597 ### Fixed
 598
 599 - Ensure trimmable characters are checked at pool initialization.
 600 - Fix message id integer overflow.
 601 - Fix pool worker removal in worker choice strategy internals.
 602
 603 ## [2.3.10] - 2023-03-18
 604
 605 ### Fixed
 606
 607 - Fix package.json `exports` syntax for ESM and CommonJS.
 608
 609 ### Changed
 610
 611 - Permit SemVer pre-release publication.
 612
 613 ## [2.3.10-2] - 2023-03-18
 614
 615 ### Fixed
 616
 617 - Fix package.json `exports` syntax for ESM and CommonJS.
 618
 619 ## [2.3.10-1] - 2023-03-18
 620
 621 ### Changed
 622
 623 - Permit SemVer pre-release publication.
 624
 625 ## [2.3.10-0] - 2023-03-18
 626
 627 ### Fixed
 628
 629 - Fix package.json `exports` syntax for ESM and CommonJS.
 630
 631 ## [2.3.9] - 2023-03-18
 632
 633 ### Changed
 634
 635 - Introduce ESM module support along with CommonJS one.
 636
 637 ### Fixed
 638
 639 - Fix brown paper bag bug referencing the same object literal.
 640
 641 ## [2.3.8] - 2023-03-18
 642
 643 ### Changed
 644
 645 - Switch internal benchmarking code to benny.
 646 - Switch to TypeScript 5.x.x.
 647 - Switch rollup bundler plugins to core ones.
 648 - Switch to TSDoc syntax.
 649 - Enforce conventional commits.
 650
 651 ### Fixed
 652
 653 - Fix random integer generator.
 654 - Fix worker choice strategy pool type identification at initialization.
 655
 656 ## [2.3.7] - 2022-10-23
 657
 658 ### Changed
 659
 660 - Switch to open collective FOSS project funding platform.
 661 - Switch to ts-standard linter configuration on TypeScript code.
 662
 663 ### Fixed
 664
 665 - Fixed missing async on pool execute method.
 666 - Fixed typing in TypeScript example.
 667 - Fixed types in unit tests.
 668
 669 ## [2.3.6] - 2022-10-22
 670
 671 ### Changed
 672
 673 - Cleanup pool attributes and methods.
 674 - Refine error types thrown.
 675
 676 ### Fixed
 677
 678 - Fix continuous integration build on windows.
 679 - Fix code coverage reporting by using c8 instead of nyc.
 680
 681 ## [2.3.5] - 2022-10-21
 682
 683 ### Changed
 684
 685 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
 686 - Optimize tasks usage lookup implementation.
 687
 688 ### Fixed
 689
 690 - Fix missed pool event emitter type export.
 691 - Fix typedoc documentation generation.
 692
 693 ## [2.3.4] - 2022-10-17
 694
 695 ### Added
 696
 697 - Fully automate release process with release-it.
 698
 699 ### Changed
 700
 701 - Optimize fair share task scheduling algorithm implementation.
 702 - Update benchmarks versus external pools results with latest version.
 703
 704 ## [2.3.3] - 2022-10-15
 705
 706 ### Added
 707
 708 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
 709
 710 ## [2.3.2] - 2022-10-14
 711
 712 ### Changed
 713
 714 - Optimize fair share worker selection strategy implementation.
 715
 716 ### Fixed
 717
 718 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
 719
 720 ## [2.3.1] - 2022-10-13
 721
 722 ### Added
 723
 724 - Pool worker choice strategies:
 725   - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
 726   - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
 727
 728 ## [2.2.2] - 2022-10-09
 729
 730 ### Fixed
 731
 732 - Fixed `README.md` file.
 733
 734 ## [2.2.1] - 2022-10-08
 735
 736 ### Added
 737
 738 - Dynamic worker choice strategy change at runtime.
 739
 740 ## [2.2.0] - 2022-01-05
 741
 742 ### Breaking Changes
 743
 744 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
 745
 746 ## [2.1.0] - 2021-08-29
 747
 748 ### Added
 749
 750 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
 751
 752 ### Breaking Changes
 753
 754 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
 755 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
 756 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
 757 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
 758
 759 ## [2.0.2] - 2021-05-12
 760
 761 ### Bug fixes
 762
 763 - Fix `busy` event emission on fixed pool type
 764
 765 ## [2.0.1] - 2021-03-16
 766
 767 ### Bug fixes
 768
 769 - Check if pool options are properly set.
 770 - `busy` event is emitted on all pool types.
 771
 772 ## [2.0.0] - 2021-03-01
 773
 774 ### Bug fixes
 775
 776 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
 777
 778 ### Breaking Changes
 779
 780 - `FullPool` event is now renamed to `busy`.
 781 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
 782   _Find more details on our JSDoc._
 783
 784 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
 785
 786 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
 787
 788 ### Pool options types declaration merge
 789
 790 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
 791
 792 #### New `export` strategy
 793
 794 ```js
 795 // Before
 796 const DynamicThreadPool = require('poolifier/lib/dynamic')
 797 // After
 798 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
 799 ```
 800
 801 But you should always prefer just using
 802
 803 ```js
 804 const { DynamicThreadPool } = require('poolifier')
 805 ```
 806
 807 #### New type definitions for input data and response
 808
 809 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
 810 _This is not a limitation by poolifier but Node.js._
 811
 812 #### Public property replacements
 813
 814 `numWorkers` property is now `numberOfWorkers`
 815
 816 #### Internal (protected) properties and methods renaming
 817
 818 These properties are not intended for end users
 819
 820 - `id` => `nextMessageId`
 821
 822 These methods are not intended for end users
 823
 824 - `_chooseWorker` => `chooseWorker`
 825 - `_newWorker` => `createWorker`
 826 - `_execute` => `internalExecute`
 827 - `_chooseWorker` => `chooseWorker`
 828 - `_checkAlive` => `checkAlive`
 829 - `_run` => `run`
 830 - `_runAsync` => `runAsync`
 831
 832 ## [1.1.0] - 2020-05-21
 833
 834 ### Added
 835
 836 - ThreadWorker support async functions as option
 837 - Various external library patches
 838
 839 ## [1.0.0] - 2020-01-24
 840
 841 ### Added
 842
 843 - FixedThreadPool implementation
 844 - DynamicThreadPool implementation
 845 - WorkerThread implementation to improve developer experience