edit-xml 0.1.0

Read, modify and write xml in tree-like structure.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126

use bench_utils::{bench, LARGE_XML, MEDIUM_XML, TINY_XML};
use criterion::{criterion_group, criterion_main, Criterion};
use std::fs::File;
use std::path::Path;
mod bench_utils;

mod xml_rs_bench {
    use super::*;
    use std::io::BufReader;
    use xml_rs::reader::{EventReader, XmlEvent};

    pub fn xml_rs_parser(path: &Path) -> usize {
        let mut counter = 0;
        let file = File::open(path).unwrap();
        let file = BufReader::new(file);

        let parser = EventReader::new(file);

        for e in parser.into_iter().flatten() {
            if let XmlEvent::StartElement {
                name, attributes, ..
            } = e
            {
                counter += name.local_name.len();
                for attr in attributes {
                    counter += attr.value.len();
                }
            }
        }
        counter
    }
}
use xml_rs_bench::xml_rs_parser;

bench!(TINY_XML, tiny_xml_rs, xml_rs_parser);
bench!(MEDIUM_XML, medium_xml_rs, xml_rs_parser);
bench!(LARGE_XML, large_xml_rs, xml_rs_parser);
criterion_group!(xml_rs, tiny_xml_rs, medium_xml_rs, large_xml_rs);

/// Parser Benchmarking
/// Calculates sum of tag local name byte length and attribute values byte length
///
/// Because quick_xml just stores the whole tag content as bytes without processing it
/// the below test should take that into consideration as it makes it calculate tag name and attributes.
//////////////////////////////////////////

fn quick_xml_parser(path: &Path) -> usize {
    let mut count = 0;
    let mut reader = quick_xml::Reader::from_file(path).unwrap();
    let mut buf = Vec::new();
    loop {
        match reader.read_event_into(&mut buf) {
            Ok(quick_xml::events::Event::Start(tag)) | Ok(quick_xml::events::Event::Empty(tag)) => {
                count += 1;
                // WTF
                for attr in tag.attributes() {
                    let attr = attr.unwrap();
                    count += attr.value.len();
                }
            }
            Ok(quick_xml::events::Event::Eof) => {
                break;
            }
            _ => (),
        }
    }
    count
}

bench!(TINY_XML, tiny_quick_xml, quick_xml_parser);
bench!(MEDIUM_XML, medium_quick_xml, quick_xml_parser);
bench!(LARGE_XML, large_quick_xml, quick_xml_parser);
criterion_group!(quick_xml, tiny_quick_xml, medium_quick_xml, large_quick_xml);

mod xml5ever_bench {
    use std::sync::atomic::AtomicUsize;
    use std::sync::Arc;

    use super::*;
    use markup5ever::buffer_queue::BufferQueue;
    use xml5ever::tendril::*;
    use xml5ever::tokenizer::{TagToken, Token, TokenSink, XmlTokenizer};
    #[derive(Clone)]
    struct TokenCounter {
        counter: Arc<AtomicUsize>,
    }

    impl TokenSink for TokenCounter {
        fn process_token(&self, token: Token) {
            // THE NEWEST VERSION ISNT MUTABLE.  So Using an Arc to make things less annoying
            if let TagToken(tag) = token {
                let mut add = tag.name.local.as_ref().len();
                for attr in tag.attrs {
                    add += attr.value.len()
                }
                self.counter
                    .fetch_add(add, std::sync::atomic::Ordering::Relaxed);
            }
        }
    }

    pub fn xml5ever_parser(path: &Path) -> usize {
        let sink = TokenCounter {
            counter: Arc::new(AtomicUsize::default()),
        };

        let mut file = File::open(path).expect("can't open file");
        let mut input = ByteTendril::new();
        file.read_to_tendril(&mut input).expect("can't read file");
        let input_buffer = BufferQueue::default();
        input_buffer.push_back(input.try_reinterpret().unwrap());
        let tok = XmlTokenizer::new(sink.clone(), Default::default());
        tok.feed(&input_buffer);
        tok.end();

        sink.counter.load(std::sync::atomic::Ordering::Relaxed)
    }
}
use xml5ever_bench::xml5ever_parser;

bench!(TINY_XML, tiny_xml5ever, xml5ever_parser);
bench!(MEDIUM_XML, medium_xml5ever, xml5ever_parser);
bench!(LARGE_XML, large_xml5ever, xml5ever_parser);
criterion_group!(xml5ever, tiny_xml5ever, medium_xml5ever, large_xml5ever);

criterion_main!(xml_rs, quick_xml, xml5ever);