You hit a four-fold performance drop in a production LLM pipeline. The profiler points straight at a closed-source binary blob: libtpu.so, a proprietary MLIR accelerator plugin, or a closed routine...

These two Rust loops differ by one element. // 1. `0..n` visits 0, 1, ..., n - 1. pub fn excl(n: u64) -> u64 { let mut s = 0u64; for i in 0..n { s = s.wrapping_add(i.wrapping_mu...

This program has no unsafe block. It compiles on stable Rust 1.95, and it prints a number from the wrong vector. pub fn main() { let mut a: Vec<u64> = vec![1]; let mut b: Vec<u64&...

serde is one of the foundational crates in Rust. Its serde_core/Cargo.toml contains a dependency that can never be compiled. # This cfg cannot be enabled, but it still forces Cargo to keep serde_d...

Windows 1.0 shipped in 1985 and asked for 256 KB of memory and two floppy drives.1 Windows 11 asks for 4 GB of memory and 64 GB of storage. That is a factor of sixteen thousand in memory and someth...

Software engineers operate under a comforting fiction: reading a value is free. In C++, we decorate pointers with const to assure the compiler that inspection produces no side effects. In function...

Pull up the die photo of any high-performance CPU from the last fifteen years and point at the parts that do arithmetic. They are small. The integer ALUs and the vector units are a modest slice of ...

I keep noticing the same pattern working with models on real code. The Rust I get back is better than the C++ I get back, and the Lean is better than either. The Rust compiles and does what I asked...

At Hot Chips this week, OpenAI presented Jalapeño, an inference ASIC co-designed with Broadcom.1 The architecture slide circulating since the presentation frames a request pipeline split three ways...

Prefix caching can cause the same prompt to produce different logits on a cache hit versus a cache miss. In many operational contexts, this is quickly categorized as a defect. However, a bug strict...