For example, both .NET and Java make use of exceptions, which Swift doesn't have. A handful of other features aren't supported yet, reflecting the beta status of the compiler.

After tuning, Apple reported sub-millisecond 99.9th percentile latencies and a dramatic drop in memory usage: Swift instances consumed hundreds of megabytes, compared to tens of gigabytes with Java.

Apple has switched its password monitoring service from Java to Swift and Vapor and is now announcing a performance gain of forty percent. According to Apple, scalability, security, and ...