Function histogram_simple

src/histogram.rs:9–15

(bytes: &[u8])

}

fn histogram_simple(bytes: &[u8]) -> [usize; 256] {
    let mut histogram = [0; 256];
    for &v in bytes {
        histogram[v as usize] += 1;
    }
    histogram
}

fn histogram_parallel(bytes: &[u8]) -> [usize; 256] {
    // Summing multiple 32 bit histograms is faster than a 64 bit histogram.