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bench.rs
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bench.rs
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use std::fmt::{Debug, Display};
use std::io::{self, ByRefReader};
use std::io::Reader as IoReader;
use stdtest::Bencher;
use Reader;
static CSV_DATA: &'static str = "./examples/data/bench.csv";
fn ordie<T, E: Debug+Display>(r: Result<T, E>) -> T {
r.or_else(|e: E| -> Result<T, E> panic!(format!("{:?}", e))).unwrap()
}
fn file_to_mem(fp: &str) -> io::MemReader {
use std::path::Path;
let mut f = ordie(io::File::open(&Path::new(fp)));
let bs = ordie(f.read_to_end());
io::MemReader::new(bs)
}
fn reader<'a>(rdr: &'a mut io::MemReader)
-> Reader<io::RefReader<'a, io::MemReader>> {
let _ = ordie(rdr.seek(0, io::SeekSet));
Reader::from_reader(rdr.by_ref())
}
#[bench]
fn raw_records(b: &mut Bencher) {
let mut data = file_to_mem(CSV_DATA);
b.bytes = data.get_ref().len() as u64;
b.iter(|| {
let mut dec = reader(&mut data);
while !dec.done() {
while let Some(r) = dec.next_field().into_iter_result() {
r.unwrap();
}
}
})
}
#[bench]
fn byte_records(b: &mut Bencher) {
let mut data = file_to_mem(CSV_DATA);
b.bytes = data.get_ref().len() as u64;
b.iter(|| {
let mut dec = reader(&mut data);
for r in dec.byte_records() { let _ = r.unwrap(); }
})
}
#[bench]
fn string_records(b: &mut Bencher) {
let mut data = file_to_mem(CSV_DATA);
b.bytes = data.get_ref().len() as u64;
b.iter(|| {
let mut dec = reader(&mut data);
for r in dec.records() { let _ = r.unwrap(); }
})
}
#[allow(dead_code)]
#[derive(RustcDecodable)]
struct Play {
gameid: String,
qtr: i32,
min: Option<i32>,
sec: Option<i32>,
team_off: String,
team_def: String,
down: Option<i32>,
togo: Option<i32>,
ydline: Option<i32>,
description: String,
offscore: i32,
defscore: i32,
season: i32,
}
#[bench]
fn decoded_records(b: &mut Bencher) {
let mut data = file_to_mem(CSV_DATA);
b.bytes = data.get_ref().len() as u64;
b.iter(|| {
let mut dec = reader(&mut data);
for r in dec.decode::<Play>() { let _ = r.unwrap(); }
})
}