WHY BREAKING CHANGES? • @sokra • @wSokra • WEBPACK • FULL-TIME CORE TEAM • YEAH WEBPACK 5 • • • BREAKING CHANGES • BREAK MY BUILD • INVEST TIME • WHY • WHY LARGEST BREAKING CHANGES • BONUS KNOW KNOW PREPARED • BONUS BENEFITS • DISLIKE BREAKING CHANGES • • IT’S WORTH IT • 4.0.0 4.1.0 4.2.0 4.3.0 4.4.0 4.5.0 4.6.0 4.7.0 4.8.0 4.9.0 4.10.0 4.11.0 4.12.0 4.13.0 4.14.0 4.15.0 4.16.0 4.17.0

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.4 Multi-threading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 byte range requests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165 i 7 Changes 167 7.1 Changes to the existing API . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . store (for caching of images, fonts, etc.) • a set of locks and (un-)locking functions (for multi-threading) Without the set of locks and accompanying functions the context and its proxies may only be

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.4 Multi-threading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Library . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234 10 Changes 235 ii 10.1 Changes to the existing API . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . store (for caching of images, fonts, etc.) • a set of locks and (un-)locking functions (for multi-threading) Without the set of locks and accompanying functions the context and its proxies may only be

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.4 Multi-threading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Library . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248 11 Changes 249 11.1 Changes to the existing API . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . store (for caching of images, fonts, etc.) • a set of locks and (un-)locking functions (for multi-threading) Without the set of locks and accompanying functions the context and its proxies may only be

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.4 Multi-threading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Library . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238 10 Changes 239 ii 10.1 Changes to the existing API . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . store (for caching of images, fonts, etc.) • a set of locks and (un-)locking functions (for multi-threading) Without the set of locks and accompanying functions the context and its proxies may only be

Tasks and events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297 24 Multi-Threading 299 24.1 Starting Julia with multiple threads . . . . . . . . . . . . . . . . . . . . . . . Low-level synchronization using schedule and wait . . . . . . . . . . . . . . . . . . 951 48 Multi-Threading 954 48.1 Atomic operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1581 102.18 Proper maintenance and care of multi-threading locks . . . . . . . . . . . . . . . . 1583 102.19 Arrays with custom indices . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316 CONTENTS v 25 Multi-Threading 317 25.1 Starting Julia with multiple threads . . . . . . . . . . . . . . . . . . . . . . . Low-level synchronization using schedule and wait . . . . . . . . . . . . . . . . . . 1090 48 Multi-Threading 1092 48.1 Atomic operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1885 108.19 Proper maintenance and care of multi-threading locks . . . . . . . . . . . . . . . . 1887 108.20 Arrays with custom indices . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315 CONTENTS v 25 Multi-Threading 317 25.1 Starting Julia with multiple threads . . . . . . . . . . . . . . . . . . . . . . . Low-level synchronization using schedule and wait . . . . . . . . . . . . . . . . . . 1084 48 Multi-Threading 1086 48.1 Atomic operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1879 108.19 Proper maintenance and care of multi-threading locks . . . . . . . . . . . . . . . . 1881 108.20 Arrays with custom indices . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315 CONTENTS v 25 Multi-Threading 317 25.1 Starting Julia with multiple threads . . . . . . . . . . . . . . . . . . . . . . . Low-level synchronization using schedule and wait . . . . . . . . . . . . . . . . . . 1088 48 Multi-Threading 1090 48.1 Atomic operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1869 108.19 Proper maintenance and care of multi-threading locks . . . . . . . . . . . . . . . . 1871 108.20 Arrays with custom indices . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315 CONTENTS v 25 Multi-Threading 317 25.1 Starting Julia with multiple threads . . . . . . . . . . . . . . . . . . . . . . . Low-level synchronization using schedule and wait . . . . . . . . . . . . . . . . . . 1105 49 Multi-Threading 1107 49.1 Atomic operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1858 104.19 Proper maintenance and care of multi-threading locks . . . . . . . . . . . . . . . . 1860 104.20 Arrays with custom indices . . . . . . .