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use std::{str::FromStr, time::Instant};
use regex::Regex;
macro_rules! regex {
($re:literal $(,)?) => {{
static RE: once_cell::sync::OnceCell<regex::Regex> = once_cell::sync::OnceCell::new();
RE.get_or_init(|| regex::Regex::new($re).unwrap())
}};
}
fn slow() {
let s = r##"13.28.24.13 - - [10/Mar/2016:19:29:25 +0100] "GET /etc/lib/pChart2/examples/index.php?Action=View&Script=../../../../cnf/db.php HTTP/1.1" 404 151 "-" "HTTP_Request2/2.2.1 (http://pear.php.net/package/http_request2) PHP/5.3.16""##;
let mut total = 0;
for _ in 0..1000 {
let re = Regex::new(
r##"^(\S+) (\S+) (\S+) \[([^]]+)\] "([^"]*)" (\d+) (\d+) "([^"]*)" "([^"]*)"$"##,
)
.unwrap();
let size = usize::from_str(re.captures(s).unwrap().get(7).unwrap().as_str()).unwrap();
total += size;
}
println!("{}", total);
}
fn fast() {
let s = r##"13.28.24.13 - - [10/Mar/2016:19:29:25 +0100] "GET /etc/lib/pChart2/examples/index.php?Action=View&Script=../../../../cnf/db.php HTTP/1.1" 404 151 "-" "HTTP_Request2/2.2.1 (http://pear.php.net/package/http_request2) PHP/5.3.16""##;
let mut total = 0;
for _ in 0..1000 {
let re: &Regex = regex!(
r##"^(\S+) (\S+) (\S+) \[([^]]+)\] "([^"]*)" (\d+) (\d+) "([^"]*)" "([^"]*)"$"##,
);
let size = usize::from_str(re.captures(s).unwrap().get(7).unwrap().as_str()).unwrap();
total += size;
}
println!("{}", total);
}
fn main() {
let t = Instant::now();
slow();
println!("slow: {:?}", t.elapsed());
let t = Instant::now();
fast();
println!("fast: {:?}", t.elapsed());
}
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