Every time you save a file or build in Xcode, changed source files are added to the version database. Use this powerful tool to go where backups and Git can’t.
Xcode
Apple still supports Mavericks, Yosemite, El Capitan and Sierra in Xcode, but the next version intends dropping them. Third-party developers will get the blame.
Is it overhead from sandboxing, the file system, the throttling of I/O, or the limitations of the Efficiency cores? Is there anything a user can do?
You might want an old macOS or OS X installer to build a Virtual Machine, or for an old Mac. Here’s how to get them, and old versions of Xcode.
How ARM64 uses its special SIMD registers in lanes, and how they can be loaded with and without de-interleaving.
We often need to compare two documents, such as legal agreements or revisions of a report. How can we do this if they’re PDFs?
Three recent WWDC sessions extolling Apple’s “extensive reference material” and Xcode can’t find anything on these rich and extensive libraries.
Details options available for rounding floating point numbers, and all the scalar floating point operations. There’s another cheat sheet summary too.
Floating point numbers are very different from integers, but are loaded and stored much the same. Conversion between registers, including to and from integers, is complex.
Where code can make simple selections according to a conditional test, it may be possible to eliminate branching and ensure rapid execution.
The Eclectic Light Company 