SWIFT AT APPLE: MIGRATING THE PASSWORD MONITORING SERVICE FROM JAVA

Summary from the TLDR Web Dev newsletter

Apple migrated its Password Monitoring service from Java to Swift, resulting in a 40% performance increase. The team chose Swift due to its efficiency and ability to better manage memory compared to Java, which allowed for faster scaling and reduced server overhead. Using the Vapor web framework and custom Swift packages, they rewrote the service with less code, benefiting from Swift's protocol-oriented approach and built-in safety features.