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