In this post, we compare three ways to find the first matching byte in an ASCII sequence—naive loops, SWAR (SIMD Within A Register) techniques, and the C memchr via Haskell’s FFI. You’ll learn how each performs in real benchmarks, where FFI can deliver 50× speedups, and why overhead can erase those gains in certain workloads.

In this post, we explore how to write high-performance Haskell code using multi-dimensional arrays—comparing vector and massiv across clarity, parallelism, and raw speed. You'll learn how array layout, indexing strategies, and stencil-based computation can unlock massive performance gains by leveraging modern hardware more effectively.