easy_reader 0.5.2

A Rust library for easily navigating forward, backward or randomly through the lines of huge files.
Documentation 
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#[macro_use]
extern crate criterion;
extern crate easy_reader;

use criterion::Criterion;
use easy_reader::EasyReader;
use std::fs::File;

fn criterion_benchmark(c: &mut Criterion) {
    c.bench_function("build_index", |b| {
        b.iter(|| {
            let file = File::open("resources/fatty_lipsum_lf").unwrap();
            let mut reader = EasyReader::new(file).unwrap();
            reader.build_index().unwrap();
        })
    });

    let file = File::open("resources/fatty_lipsum_lf").unwrap();
    let mut reader = EasyReader::new(file).unwrap();
    reader.build_index().unwrap();

    #[cfg(feature = "rand")]
    c.bench_function("Random lines [1000][index]", move |b| {
        b.iter(|| {
            for _i in 0..1000 {
                reader.random_line().unwrap().unwrap();
            }
        })
    });

    #[cfg(feature = "rand")]
    c.bench_function("Random lines [1000][no_index]", |b| {
        b.iter(|| {
            let file = File::open("resources/fatty_lipsum_lf").unwrap();
            let mut reader = EasyReader::new(file).unwrap();
            for _i in 0..1000 {
                reader.random_line().unwrap().unwrap();
            }
        })
    });

    let file = File::open("resources/fatty_lipsum_lf").unwrap();
    let mut reader = EasyReader::new(file).unwrap();
    reader.build_index().unwrap();
    c.bench_function("Read backward [1000][index]", move |b| {
        b.iter(|| {
            reader.eof();
            while let Ok(Some(_line)) = reader.prev_line() {}
        })
    });

    c.bench_function("Read backward [1000][no-index]", move |b| {
        b.iter(|| {
            let file = File::open("resources/fatty_lipsum_lf").unwrap();
            let mut reader = EasyReader::new(file).unwrap();
            while let Ok(Some(_line)) = reader.prev_line() {}
        })
    });

    let file = File::open("resources/fatty_lipsum_lf").unwrap();
    let mut reader = EasyReader::new(file).unwrap();
    reader.build_index().unwrap();
    c.bench_function("Read forward [EasyReader][index]", move |b| {
        b.iter(|| {
            while let Ok(Some(_line)) = reader.next_line() {}
            reader.bof();
        })
    });

    c.bench_function("Read forward [EasyReader][no_index]", move |b| {
        b.iter(|| {
            let file = File::open("resources/fatty_lipsum_lf").unwrap();
            let mut reader = EasyReader::new(file).unwrap();
            while let Ok(Some(_line)) = reader.next_line() {}
        })
    });
}

criterion_group!(benches, criterion_benchmark);
criterion_main!(benches);