In this series of blog posts, the author delves into the inner workings of the Objective-C language and runtime. Each post focuses on a specific aspect of the language and explores the details of its implementation. The author hopes that readers will find this information valuable for demystifying the language, tackling tricky bugs, and optimizing code performance. Throughout the series, the author discusses various topics such as the unique class architecture of Objective-C, the different uses of isa pointer, unrealized classes and toll-free bridging, non-fragile instance variables, tagged pointer objects, associated references, and the retain memory management scheme. These posts provide insights into the intricacies of Objective-C and offer useful information for developers.
https://alwaysprocessing.blog/series/objc-internals