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Write using a BufWriter for +10% speed

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This commit is contained in:
Keenan Tims
2023-03-23 11:17:58 -07:00
parent 675cda945f
commit 7c74cd6f7a
1 changed files with 9 additions and 3 deletions
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12
src/main.rs
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@@ -1,16 +1,18 @@
extern crate ipnet; extern crate ipnet;
extern crate iprange; extern crate iprange;
use std::process::exit; use std::{process::exit, io};
mod iputils; mod iputils;
use iputils::{IpBothRange, IpOrNet, PrefixlenPair}; use iputils::{IpBothRange, IpOrNet, PrefixlenPair};
use clio::*; use clio::*;
use std::io::BufRead; use std::io::{Write, BufRead};
use clap::Parser; use clap::Parser;
const WRITER_BUFSIZE: usize = 32 * 1024;
#[derive(Parser)] #[derive(Parser)]
#[command(author, version, about, long_about=None)] #[command(author, version, about, long_about=None)]
struct Args { struct Args {
@@ -123,7 +125,11 @@ impl App {
self.simplify_inputs(); self.simplify_inputs();
print!("{}", self.prefixes); let stdout = io::stdout().lock();
let mut w = io::BufWriter::with_capacity(WRITER_BUFSIZE, stdout);
write!(&mut w, "{}", self.prefixes).unwrap();
w.flush().unwrap();
} }
} }