Today, Apple announced that Swift 2 was on its way, with a number of new features and better performance. But perhaps the most striking thing is that the whole codebase—the compiler and standard libraries—would be open sourced, with code that works on Linux released later this year.
Craig Federighi dropped the news about Swift as what seemed like an afterthought following a long description of MacOS and iOS features and enhancements. He said that Apple would be "stepping on the gas this year with Swift 2," and promised significant speedups to the performance of applications coded with this language. Part of this comes from what he termed "whole module optimization," although he offered no details as to what that entailed.
Most of the details came from a single slide, which showed some of the new features behind a Swift logo. Key among these were a error handling system, something that was notably missing in the original release. Developers will also appreciate much shorter compile times. But for most of the details, we'll have to wait for some of the sessions on the language, which will come later today.
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