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

events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320CONTENTS v 25 Multi-Threading 321 25.1 Starting Julia with multiple threads . . . . . . . . . . . . . . . . . . . . . . . Low-level synchronization using schedule and wait . . . . . . . . . . . . . . . . . . 1150 50 Multi-Threading 1153 50.1 Atomic operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1930 106.19 Proper maintenance and care of multi-threading locks . . . . . . . . . . . . . . . . 1932 106.20 Arrays with custom indices . . . . . . .

Tasks and events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320 25 Multi-Threading 321 25.1 Starting Julia with multiple threads . . . . . . . . . . . . . . . . . . . . . . . Low-level synchronization using schedule and wait . . . . . . . . . . . . . . . . . . 1152 50 Multi-Threading 1155 50.1 Atomic operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1933 106.19 Proper maintenance and care of multi-threading locks . . . . . . . . . . . . . . . . 1935 106.20 Arrays with custom indices . . . . . . .

events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320CONTENTS v 25 Multi-Threading 321 25.1 Starting Julia with multiple threads . . . . . . . . . . . . . . . . . . . . . . . Low-level synchronization using schedule and wait . . . . . . . . . . . . . . . . . . 1149 50 Multi-Threading 1152 50.1 Atomic operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1930 106.19 Proper maintenance and care of multi-threading locks . . . . . . . . . . . . . . . . 1932 106.20 Arrays with custom indices . . . . . . .

events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320CONTENTS v 25 Multi-Threading 321 25.1 Starting Julia with multiple threads . . . . . . . . . . . . . . . . . . . . . . . Low-level synchronization using schedule and wait . . . . . . . . . . . . . . . . . . 1149 50 Multi-Threading 1152 50.1 Atomic operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1930 106.19 Proper maintenance and care of multi-threading locks . . . . . . . . . . . . . . . . 1932 106.20 Arrays with custom indices . . . . . . .

events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320CONTENTS v 25 Multi-Threading 321 25.1 Starting Julia with multiple threads . . . . . . . . . . . . . . . . . . . . . . . Low-level synchronization using schedule and wait . . . . . . . . . . . . . . . . . . 1141 49 Multi-Threading 1144 49.1 Atomic operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1921 105.19 Proper maintenance and care of multi-threading locks . . . . . . . . . . . . . . . . 1923 105.20 Arrays with custom indices . . . . . . .