In the previous chapter, Chapter 2, Sequential Rust Performance and Testing, we discussed factors that contribute or detract from the serial performance of a Rust program. We did not explicitly address concurrent performance for want of sufficient information about the way Rust's abstract memory model interacts with the real memory hierarchy of a machine. In this chapter, we'll discuss Rust's memory model, how to control the layout of types in memory, how types are aliased, and how Rust's memory safety works. We'll dig into the standard library to understand how this plays out in practice. This chapter will also examine common crates in the ecosystem that will be of interest to us later in this book. Please be aware that by the time you read this chapter, the rustc implementation will...





















































