In this workshop, we aim to start a conversation about the performance characteristics of server-side workloads and the compiler optimizations motivated by those performance characteristics. We'll start by talking about Google's workloads and core optimizations such as ThinLTO, FDO, and Propeller, then we'll briefly walk through how to get started with using them on a simple program. Then, we'll hand off to folks at Meta and Sony to talk about their own workloads and how they inform the compiler optimizations they use. Lastly, we'll open the floor for others to share 1) what their workloads look like and 2) the optimizations they rely on, and we'll moderate an open discussion about performance characteristics, optimizations, and opportunities for collaboration.