Move the benchmarks out of de.rs

bench_vec.rs

@@ -0,0 +1,248 @@
+use test::Bencher;
+
+use serialize::Decodable;
+
+use de::{Deserializable};
+
+//////////////////////////////////////////////////////////////////////////////
+
+#[deriving(Show)]
+enum Error {
+    EndOfStream,
+    SyntaxError,
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+mod decoder {
+    use std::vec;
+    use serialize::Decoder;
+
+    use super::{Error, EndOfStream, SyntaxError};
+
+    pub struct IntsDecoder {
+        iter: vec::MoveItems<int>,
+    }
+
+    impl IntsDecoder {
+        #[inline]
+        pub fn new(values: Vec<int>) -> IntsDecoder {
+            IntsDecoder {
+                iter: values.move_iter()
+            }
+        }
+    }
+
+    impl Decoder<Error> for IntsDecoder {
+        // Primitive types:
+        fn read_nil(&mut self) -> Result<(), Error> { Err(SyntaxError) }
+        fn read_uint(&mut self) -> Result<uint, Error> { Err(SyntaxError) }
+        fn read_u64(&mut self) -> Result<u64, Error> { Err(SyntaxError) }
+        fn read_u32(&mut self) -> Result<u32, Error> { Err(SyntaxError) }
+        fn read_u16(&mut self) -> Result<u16, Error> { Err(SyntaxError) }
+        fn read_u8(&mut self) -> Result<u8, Error> { Err(SyntaxError) }
+        #[inline]
+        fn read_int(&mut self) -> Result<int, Error> {
+            match self.iter.next() {
+                Some(value) => Ok(value),
+                None => Err(EndOfStream),
+            }
+        }
+        fn read_i64(&mut self) -> Result<i64, Error> { Err(SyntaxError) }
+        fn read_i32(&mut self) -> Result<i32, Error> { Err(SyntaxError) }
+        fn read_i16(&mut self) -> Result<i16, Error> { Err(SyntaxError) }
+        fn read_i8(&mut self) -> Result<i8, Error> { Err(SyntaxError) }
+        fn read_bool(&mut self) -> Result<bool, Error> { Err(SyntaxError) }
+        fn read_f64(&mut self) -> Result<f64, Error> { Err(SyntaxError) }
+        fn read_f32(&mut self) -> Result<f32, Error> { Err(SyntaxError) }
+        fn read_char(&mut self) -> Result<char, Error> { Err(SyntaxError) }
+        fn read_str(&mut self) -> Result<StrBuf, Error> { Err(SyntaxError) }
+
+        // Compound types:
+        fn read_enum<T>(&mut self, _name: &str, _f: |&mut IntsDecoder| -> Result<T, Error>) -> Result<T, Error> { Err(SyntaxError) }
+
+        fn read_enum_variant<T>(&mut self,
+                                _names: &[&str],
+                                _f: |&mut IntsDecoder, uint| -> Result<T, Error>)
+                                -> Result<T, Error> { Err(SyntaxError) }
+        fn read_enum_variant_arg<T>(&mut self,
+                                    _a_idx: uint,
+                                    _f: |&mut IntsDecoder| -> Result<T, Error>)
+                                    -> Result<T, Error> { Err(SyntaxError) }
+
+        fn read_enum_struct_variant<T>(&mut self,
+                                       _names: &[&str],
+                                       _f: |&mut IntsDecoder, uint| -> Result<T, Error>)
+                                       -> Result<T, Error> { Err(SyntaxError) }
+        fn read_enum_struct_variant_field<T>(&mut self,
+                                             _f_name: &str,
+                                             _f_idx: uint,
+                                             _f: |&mut IntsDecoder| -> Result<T, Error>)
+                                             -> Result<T, Error> { Err(SyntaxError) }
+
+        fn read_struct<T>(&mut self, _s_name: &str, _len: uint, _f: |&mut IntsDecoder| -> Result<T, Error>)
+                          -> Result<T, Error> { Err(SyntaxError) }
+        fn read_struct_field<T>(&mut self,
+                                _f_name: &str,
+                                _f_idx: uint,
+                                _f: |&mut IntsDecoder| -> Result<T, Error>)
+                                -> Result<T, Error> { Err(SyntaxError) }
+
+        fn read_tuple<T>(&mut self, _f: |&mut IntsDecoder, uint| -> Result<T, Error>) -> Result<T, Error> { Err(SyntaxError) }
+        fn read_tuple_arg<T>(&mut self, _a_idx: uint, _f: |&mut IntsDecoder| -> Result<T, Error>) -> Result<T, Error> { Err(SyntaxError) }
+
+        fn read_tuple_struct<T>(&mut self,
+                                _s_name: &str,
+                                _f: |&mut IntsDecoder, uint| -> Result<T, Error>)
+                                -> Result<T, Error> { Err(SyntaxError) }
+        fn read_tuple_struct_arg<T>(&mut self,
+                                    _a_idx: uint,
+                                    _f: |&mut IntsDecoder| -> Result<T, Error>)
+                                    -> Result<T, Error> { Err(SyntaxError) }
+
+        // Specialized types:
+        fn read_option<T>(&mut self, _f: |&mut IntsDecoder, bool| -> Result<T, Error>) -> Result<T, Error> { Err(SyntaxError) }
+
+        #[inline]
+        fn read_seq<T>(&mut self, f: |&mut IntsDecoder, uint| -> Result<T, Error>) -> Result<T, Error> {
+            f(self, 3)
+        }
+        #[inline]
+        fn read_seq_elt<T>(&mut self, _idx: uint, f: |&mut IntsDecoder| -> Result<T, Error>) -> Result<T, Error> {
+            f(self)
+        }
+
+        fn read_map<T>(&mut self, _f: |&mut IntsDecoder, uint| -> Result<T, Error>) -> Result<T, Error> { Err(SyntaxError) }
+        fn read_map_elt_key<T>(&mut self, _idx: uint, _f: |&mut IntsDecoder| -> Result<T, Error>) -> Result<T, Error> { Err(SyntaxError) }
+        fn read_map_elt_val<T>(&mut self, _idx: uint, _f: |&mut IntsDecoder| -> Result<T, Error>) -> Result<T, Error> { Err(SyntaxError) }
+    }
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+mod deserializer {
+    use std::num;
+    use std::vec;
+
+    use super::{Error, EndOfStream, SyntaxError};
+
+    use de::Deserializer;
+    use de::{Token, Int, SeqStart, Sep, End};
+
+    #[deriving(Eq, Show)]
+    enum IntsDeserializerState {
+        IntsDeserializserStartState,
+        IntsDeserializserSepOrEndState,
+        IntsDeserializserValueState,
+        IntsDeserializserEndState,
+    }
+
+    pub struct IntsDeserializer {
+        state: IntsDeserializerState,
+        len: uint,
+        iter: vec::MoveItems<int>,
+        value: Option<int>
+    }
+
+    impl IntsDeserializer {
+        #[inline]
+        pub fn new(values: Vec<int>) -> IntsDeserializer {
+            IntsDeserializer {
+                state: IntsDeserializserStartState,
+                len: values.len(),
+                iter: values.move_iter(),
+                value: None,
+            }
+        }
+    }
+
+    impl Iterator<Result<Token, Error>> for IntsDeserializer {
+        #[inline]
+        fn next(&mut self) -> Option<Result<Token, Error>> {
+            match self.state {
+                IntsDeserializserStartState => {
+                    self.state = IntsDeserializserSepOrEndState;
+                    Some(Ok(SeqStart(self.len)))
+                }
+                IntsDeserializserSepOrEndState => {
+                    match self.iter.next() {
+                        Some(value) => {
+                            self.state = IntsDeserializserValueState;
+                            self.value = Some(value);
+                            Some(Ok(Sep))
+                        }
+                        None => {
+                            self.state = IntsDeserializserEndState;
+                            Some(Ok(End))
+                        }
+                    }
+                }
+                IntsDeserializserValueState => {
+                    self.state = IntsDeserializserSepOrEndState;
+                    match self.value.take() {
+                        Some(value) => Some(Ok(Int(value))),
+                        None => Some(Err(self.end_of_stream_error())),
+                    }
+                }
+                IntsDeserializserEndState => {
+                    None
+                }
+            }
+        }
+    }
+
+    impl Deserializer<Error> for IntsDeserializer {
+        #[inline]
+        fn end_of_stream_error(&self) -> Error {
+            EndOfStream
+        }
+
+        #[inline]
+        fn syntax_error(&self) -> Error {
+            SyntaxError
+        }
+
+        #[inline]
+        fn expect_num<T: NumCast>(&mut self) -> Result<T, Error> {
+            assert_eq!(self.state, IntsDeserializserValueState);
+
+            self.state = IntsDeserializserSepOrEndState;
+
+            match self.value.take() {
+                Some(value) => {
+                    match num::cast(value) {
+                        Some(value) => Ok(value),
+                        None => Err(self.syntax_error()),
+                    }
+                }
+                None => Err(self.end_of_stream_error()),
+            }
+        }
+    }
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+#[bench]
+fn bench_ints_decoder(b: &mut Bencher) {
+    b.iter(|| {
+        let ints = vec!(5, 6, 7);
+
+        let mut d = decoder::IntsDecoder::new(ints);
+        let value: Vec<int> = Decodable::decode(&mut d).unwrap();
+
+        assert_eq!(value, vec!(5, 6, 7));
+    })
+}
+
+#[bench]
+fn bench_ints_deserializer(b: &mut Bencher) {
+    b.iter(|| {
+        let ints = vec!(5, 6, 7);
+
+        let mut d = deserializer::IntsDeserializer::new(ints);
+        let value: Vec<int> = Deserializable::deserialize(&mut d).unwrap();
+
+        assert_eq!(value, vec!(5, 6, 7));
+    })
+}