serde/serde_tests/benches/bench_vec.rs
2016-02-23 20:21:07 -08:00

629 lines
19 KiB
Rust

use std::fmt::Debug;
use std::fmt;
use std::error;
use test::Bencher;
use rustc_serialize::{Decoder, Decodable};
use serde;
use serde::de::{Deserializer, Deserialize};
//////////////////////////////////////////////////////////////////////////////
#[derive(PartialEq, Debug)]
pub enum Error {
EndOfStreamError,
SyntaxError,
}
impl serde::de::Error for Error {
fn custom(_: String) -> Error { Error::SyntaxError }
fn end_of_stream() -> Error { Error::EndOfStreamError }
fn unknown_field(_: &str) -> Error { Error::SyntaxError }
fn missing_field(_: &'static str) -> Error { Error::SyntaxError }
}
impl fmt::Display for Error {
fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
formatter.write_str(format!("{:?}", self).as_ref())
}
}
impl error::Error for Error {
fn description(&self) -> &str {
"Serde Deserialization Error"
}
fn cause(&self) -> Option<&error::Error> {
None
}
}
//////////////////////////////////////////////////////////////////////////////
mod decoder {
use std::vec;
use rustc_serialize;
use super::Error;
pub struct UsizeDecoder {
len: usize,
iter: vec::IntoIter<usize>,
}
impl UsizeDecoder {
#[inline]
pub fn new(values: Vec<usize>) -> UsizeDecoder {
UsizeDecoder {
len: values.len(),
iter: values.into_iter(),
}
}
}
impl rustc_serialize::Decoder for UsizeDecoder {
type Error = Error;
fn error(&mut self, _: &str) -> Error { Error::SyntaxError }
// Primitive types:
fn read_nil(&mut self) -> Result<(), Error> { Err(Error::SyntaxError) }
#[inline]
fn read_usize(&mut self) -> Result<usize, Error> {
match self.iter.next() {
Some(value) => Ok(value),
None => Err(Error::EndOfStreamError),
}
}
fn read_u64(&mut self) -> Result<u64, Error> { Err(Error::SyntaxError) }
fn read_u32(&mut self) -> Result<u32, Error> { Err(Error::SyntaxError) }
fn read_u16(&mut self) -> Result<u16, Error> { Err(Error::SyntaxError) }
fn read_u8(&mut self) -> Result<u8, Error> { Err(Error::SyntaxError) }
fn read_isize(&mut self) -> Result<isize, Error> { Err(Error::SyntaxError) }
fn read_i64(&mut self) -> Result<i64, Error> { Err(Error::SyntaxError) }
fn read_i32(&mut self) -> Result<i32, Error> { Err(Error::SyntaxError) }
fn read_i16(&mut self) -> Result<i16, Error> { Err(Error::SyntaxError) }
fn read_i8(&mut self) -> Result<i8, Error> { Err(Error::SyntaxError) }
fn read_bool(&mut self) -> Result<bool, Error> { Err(Error::SyntaxError) }
fn read_f64(&mut self) -> Result<f64, Error> { Err(Error::SyntaxError) }
fn read_f32(&mut self) -> Result<f32, Error> { Err(Error::SyntaxError) }
fn read_char(&mut self) -> Result<char, Error> { Err(Error::SyntaxError) }
fn read_str(&mut self) -> Result<String, Error> { Err(Error::SyntaxError) }
// Compound types:
fn read_enum<T, F>(&mut self, _name: &str, _f: F) -> Result<T, Error> where
F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
fn read_enum_variant<T, F>(&mut self, _names: &[&str], _f: F) -> Result<T, Error> where
F: FnOnce(&mut UsizeDecoder, usize) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
fn read_enum_variant_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
fn read_enum_struct_variant<T, F>(&mut self, _names: &[&str], _f: F) -> Result<T, Error> where
F: FnOnce(&mut UsizeDecoder, usize) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
fn read_enum_struct_variant_field<T, F>(&mut self, _f_name: &str, _f_idx: usize, _f: F) -> Result<T, Error> where
F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
fn read_struct<T, F>(&mut self, _s_name: &str, _len: usize, _f: F) -> Result<T, Error> where
F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
fn read_struct_field<T, F>(&mut self, _f_name: &str, _f_idx: usize, _f: F) -> Result<T, Error> where
F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
fn read_tuple<T, F>(&mut self, _len: usize, _f: F) -> Result<T, Error> where
F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
fn read_tuple_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
fn read_tuple_struct<T, F>(&mut self, _s_name: &str, _len: usize, _f: F) -> Result<T, Error> where
F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
fn read_tuple_struct_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
// Specialized types:
fn read_option<T, F>(&mut self, _f: F) -> Result<T, Error> where
F: FnOnce(&mut UsizeDecoder, bool) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
#[inline]
fn read_seq<T, F>(&mut self, f: F) -> Result<T, Error> where
F: FnOnce(&mut UsizeDecoder, usize) -> Result<T, Error>,
{
let len = self.len;
f(self, len)
}
#[inline]
fn read_seq_elt<T, F>(&mut self, _idx: usize, f: F) -> Result<T, Error> where
F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
{
f(self)
}
fn read_map<T, F>(&mut self, _f: F) -> Result<T, Error> where
F: FnOnce(&mut UsizeDecoder, usize) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
fn read_map_elt_key<T, F>(&mut self, _idx: usize, _f: F) -> Result<T, Error> where
F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
fn read_map_elt_val<T, F>(&mut self, _idx: usize, _f: F) -> Result<T, Error> where
F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
}
pub struct U8Decoder {
len: usize,
iter: vec::IntoIter<u8>,
}
impl U8Decoder {
#[inline]
pub fn new(values: Vec<u8>) -> U8Decoder {
U8Decoder {
len: values.len(),
iter: values.into_iter(),
}
}
}
impl rustc_serialize::Decoder for U8Decoder {
type Error = Error;
fn error(&mut self, _: &str) -> Error { Error::SyntaxError }
// Primitive types:
fn read_nil(&mut self) -> Result<(), Error> { Err(Error::SyntaxError) }
fn read_usize(&mut self) -> Result<usize, Error> { Err(Error::SyntaxError) }
fn read_u64(&mut self) -> Result<u64, Error> { Err(Error::SyntaxError) }
fn read_u32(&mut self) -> Result<u32, Error> { Err(Error::SyntaxError) }
fn read_u16(&mut self) -> Result<u16, Error> { Err(Error::SyntaxError) }
#[inline]
fn read_u8(&mut self) -> Result<u8, Error> {
match self.iter.next() {
Some(value) => Ok(value),
None => Err(Error::EndOfStreamError),
}
}
#[inline]
fn read_isize(&mut self) -> Result<isize, Error> { Err(Error::SyntaxError) }
fn read_i64(&mut self) -> Result<i64, Error> { Err(Error::SyntaxError) }
fn read_i32(&mut self) -> Result<i32, Error> { Err(Error::SyntaxError) }
fn read_i16(&mut self) -> Result<i16, Error> { Err(Error::SyntaxError) }
fn read_i8(&mut self) -> Result<i8, Error> { Err(Error::SyntaxError) }
fn read_bool(&mut self) -> Result<bool, Error> { Err(Error::SyntaxError) }
fn read_f64(&mut self) -> Result<f64, Error> { Err(Error::SyntaxError) }
fn read_f32(&mut self) -> Result<f32, Error> { Err(Error::SyntaxError) }
fn read_char(&mut self) -> Result<char, Error> { Err(Error::SyntaxError) }
fn read_str(&mut self) -> Result<String, Error> { Err(Error::SyntaxError) }
// Compound types:
fn read_enum<T, F>(&mut self, _name: &str, _f: F) -> Result<T, Error> where
F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
fn read_enum_variant<T, F>(&mut self, _names: &[&str], _f: F) -> Result<T, Error> where
F: FnOnce(&mut U8Decoder, usize) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
fn read_enum_variant_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
fn read_enum_struct_variant<T, F>(&mut self, _names: &[&str], _f: F) -> Result<T, Error> where
F: FnOnce(&mut U8Decoder, usize) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
fn read_enum_struct_variant_field<T, F>(&mut self, _f_name: &str, _f_idx: usize, _f: F) -> Result<T, Error> where
F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
fn read_struct<T, F>(&mut self, _s_name: &str, _len: usize, _f: F) -> Result<T, Error> where
F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
fn read_struct_field<T, F>(&mut self, _f_name: &str, _f_idx: usize, _f: F) -> Result<T, Error> where
F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
fn read_tuple<T, F>(&mut self, _len: usize, _f: F) -> Result<T, Error> where
F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
fn read_tuple_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
fn read_tuple_struct<T, F>(&mut self, _s_name: &str, _len: usize, _f: F) -> Result<T, Error> where
F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
fn read_tuple_struct_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
// Specialized types:
fn read_option<T, F>(&mut self, _f: F) -> Result<T, Error> where
F: FnOnce(&mut U8Decoder, bool) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
#[inline]
fn read_seq<T, F>(&mut self, f: F) -> Result<T, Error> where
F: FnOnce(&mut U8Decoder, usize) -> Result<T, Error>,
{
let len = self.len;
f(self, len)
}
#[inline]
fn read_seq_elt<T, F>(&mut self, _idx: usize, f: F) -> Result<T, Error> where
F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
{
f(self)
}
fn read_map<T, F>(&mut self, _f: F) -> Result<T, Error> where
F: FnOnce(&mut U8Decoder, usize) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
fn read_map_elt_key<T, F>(&mut self, _idx: usize, _f: F) -> Result<T, Error> where
F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
fn read_map_elt_val<T, F>(&mut self, _idx: usize, _f: F) -> Result<T, Error> where
F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
{
Err(Error::SyntaxError)
}
}
}
//////////////////////////////////////////////////////////////////////////////
mod deserializer {
//use std::num;
use std::vec;
use super::Error;
use serde::de;
#[derive(PartialEq, Debug)]
enum State {
StartState,
SepOrEndState,
EndState,
}
pub struct Deserializer<A> {
state: State,
iter: vec::IntoIter<A>,
len: usize,
value: Option<A>,
}
impl<A> Deserializer<A> {
#[inline]
pub fn new(values: Vec<A>) -> Deserializer<A> {
let len = values.len();
Deserializer {
state: State::StartState,
iter: values.into_iter(),
len: len,
value: None,
}
}
}
impl de::Deserializer for Deserializer<usize> {
type Error = Error;
#[inline]
fn deserialize<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
where V: de::Visitor,
{
match self.state {
State::StartState => {
self.state = State::SepOrEndState;
visitor.visit_seq(self)
}
State::SepOrEndState => {
visitor.visit_usize(self.value.take().unwrap())
}
State::EndState => {
Err(Error::EndOfStreamError)
}
}
}
}
impl de::SeqVisitor for Deserializer<usize> {
type Error = Error;
#[inline]
fn visit<T>(&mut self) -> Result<Option<T>, Error>
where T: de::Deserialize,
{
match self.iter.next() {
Some(value) => {
self.len -= 1;
self.value = Some(value);
Ok(Some(try!(de::Deserialize::deserialize(self))))
}
None => {
self.state = State::EndState;
Ok(None)
}
}
}
#[inline]
fn end(&mut self) -> Result<(), Error> {
match self.iter.next() {
Some(_) => Err(Error::SyntaxError),
None => {
self.state = State::EndState;
Ok(())
}
}
}
#[inline]
fn size_hint(&self) -> (usize, Option<usize>) {
(self.len, Some(self.len))
}
}
impl de::Deserializer for Deserializer<u8> {
type Error = Error;
#[inline]
fn deserialize<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
where V: de::Visitor,
{
match self.state {
State::StartState => {
self.state = State::SepOrEndState;
visitor.visit_seq(self)
}
State::SepOrEndState => {
visitor.visit_u8(self.value.take().unwrap())
}
State::EndState => {
Err(Error::EndOfStreamError)
}
}
}
}
impl de::SeqVisitor for Deserializer<u8> {
type Error = Error;
#[inline]
fn visit<T>(&mut self) -> Result<Option<T>, Error>
where T: de::Deserialize,
{
match self.iter.next() {
Some(value) => {
self.len -= 1;
self.value = Some(value);
Ok(Some(try!(de::Deserialize::deserialize(self))))
}
None => {
self.state = State::EndState;
Ok(None)
}
}
}
#[inline]
fn end(&mut self) -> Result<(), Error> {
match self.iter.next() {
Some(_) => Err(Error::SyntaxError),
None => {
self.state = State::EndState;
Ok(())
}
}
}
#[inline]
fn size_hint(&self) -> (usize, Option<usize>) {
(self.len, Some(self.len))
}
}
}
//////////////////////////////////////////////////////////////////////////////
fn run_decoder<
D: Decoder<Error=Error>,
T: Clone + PartialEq + Debug + Decodable
>(mut d: D, value: T) {
let v = Decodable::decode(&mut d);
assert_eq!(Ok(value), v);
}
fn run_deserializer<D, T>(mut d: D, value: T)
where D: Deserializer,
D::Error: Debug + PartialEq,
T: Clone + PartialEq + Debug + Deserialize
{
let v = T::deserialize(&mut d);
assert_eq!(Ok(value), v);
}
#[bench]
fn bench_decoder_usize_000(b: &mut Bencher) {
b.iter(|| {
let v: Vec<usize> = vec!();
run_decoder(decoder::UsizeDecoder::new(v.clone()), v)
})
}
#[bench]
fn bench_decoder_usize_003(b: &mut Bencher) {
b.iter(|| {
let v: Vec<usize> = vec!(1, 2, 3);
run_decoder(decoder::UsizeDecoder::new(v.clone()), v)
})
}
#[bench]
fn bench_decoder_usize_100(b: &mut Bencher) {
b.iter(|| {
let v: Vec<usize> = (0 .. 100).collect();
run_decoder(decoder::UsizeDecoder::new(v.clone()), v)
})
}
#[bench]
fn bench_decoder_u8_000(b: &mut Bencher) {
b.iter(|| {
let v: Vec<u8> = vec!();
run_decoder(decoder::U8Decoder::new(v.clone()), v)
})
}
#[bench]
fn bench_decoder_u8_003(b: &mut Bencher) {
b.iter(|| {
let v: Vec<u8> = vec!(1, 2, 3);
run_decoder(decoder::U8Decoder::new(v.clone()), v)
})
}
#[bench]
fn bench_decoder_u8_100(b: &mut Bencher) {
b.iter(|| {
let v: Vec<u8> = (0 .. 100).collect();
run_decoder(decoder::U8Decoder::new(v.clone()), v)
})
}
#[bench]
fn bench_deserializer_usize_000(b: &mut Bencher) {
b.iter(|| {
let v: Vec<usize> = vec!();
run_deserializer(deserializer::Deserializer::new(v.clone()), v)
})
}
#[bench]
fn bench_deserializer_usize_003(b: &mut Bencher) {
b.iter(|| {
let v: Vec<usize> = vec!(1, 2, 3);
run_deserializer(deserializer::Deserializer::new(v.clone()), v)
})
}
#[bench]
fn bench_deserializer_usize_100(b: &mut Bencher) {
b.iter(|| {
let v: Vec<usize> = (0 .. 100).collect();
run_deserializer(deserializer::Deserializer::new(v.clone()), v)
})
}
#[bench]
fn bench_deserializer_u8_000(b: &mut Bencher) {
b.iter(|| {
let v: Vec<u8> = vec!();
run_deserializer(deserializer::Deserializer::new(v.clone()), v)
})
}
#[bench]
fn bench_deserializer_u8_003(b: &mut Bencher) {
b.iter(|| {
let v: Vec<u8> = vec!(1, 2, 3);
run_deserializer(deserializer::Deserializer::new(v.clone()), v)
})
}
#[bench]
fn bench_deserializer_u8_100(b: &mut Bencher) {
b.iter(|| {
let v: Vec<u8> = (0 .. 100).collect();
run_deserializer(deserializer::Deserializer::new(v.clone()), v)
})
}