Let's see Paul Allen's SIMD CSV parser

A deep dive into a SIMD-based CSV parser written in Rust, inspired by the simdjson paper. Covers three core techniques: vectorized character classification using dual nibble lookup tables (vqtbl1q_u8 on ARM NEON), bitmask compression of classified bytes, and prefix XOR (via vmull_p64 carryless multiplication) to filter out structural characters inside quoted fields. Includes both scalar and vectorized Rust code examples with ARM NEON intrinsics, and explains how to extract field and row boundaries using leading-zero counting on bitmasks.