Reading Large Files and Perf

The author benchmarks five Rust file-reading strategies—vanilla String read, raw IO, block reads, buffered block reads, and a multithreaded reader—by timing 5 GB file reads on an M1 Mac with hyperfine, finding naive approaches are slow, block/buffered reads are faster, and concurrent threaded reads are the fastest (about 3x over buffered), demonstrating that SSD characteristics favor parallel access over HDD-era single-seek optimizations.