benchmars. optimised inserting empty list
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46
benches/rlp.rs
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46
benches/rlp.rs
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@ -0,0 +1,46 @@
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//! benchmarking for rlp
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//! should be started with:
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//! ```bash
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//! multirust run nightly cargo bench
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//! ```
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#![feature(test)]
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extern crate test;
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extern crate ethcore_util;
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use test::Bencher;
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use ethcore_util::rlp::{RlpStream};
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#[bench]
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fn bench_stream_value(b: &mut Bencher) {
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b.iter( || {
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//1029
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let mut stream = RlpStream::new();
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stream.append(&1029u32);
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let _ = stream.out().unwrap();
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});
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}
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#[bench]
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fn bench_stream_nested_empty_lists(b: &mut Bencher) {
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b.iter( || {
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// [ [], [[]], [ [], [[]] ] ]
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let mut stream = RlpStream::new_list(3);
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stream.append_list(0);
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stream.append_list(1).append_list(0);
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stream.append_list(2).append_list(0).append_list(1).append_list(0);
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let _ = stream.out().unwrap();
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});
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}
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#[bench]
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fn bench_stream_1000_empty_lists(b: &mut Bencher) {
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b.iter( || {
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let mut stream = RlpStream::new();
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for _ in 0..1000 {
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stream.append_list(0);
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}
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let _ = stream.out().unwrap();
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});
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}
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@ -286,14 +286,13 @@ impl RlpStream {
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}
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/// declare appending the list of given size
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/// TODO: optimise insertion of empty list
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pub fn append_list<'a>(&'a mut self, len: usize) -> &'a mut RlpStream {
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// push new list
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let position = self.encoder.bytes.len();
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match len {
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0 => {
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// we may finish, if the appended list len is equal 0
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self.encoder.insert_list_len_at_pos(0, position);
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self.encoder.bytes.push(0xc0u8);
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self.try_to_finish();
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},
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_ => self.unfinished_lists.push_back(ListInfo::new(position, len))
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