add benches code

Cargo.toml

@@ -25,6 +25,11 @@ winnow = "0.6.8"
 
 [dev-dependencies]
 serde_json = { version = "1.0.87" }
+criterion = "0.3"
+
+[[bench]]
+name = "parser_benchmark"
+harness = false
 
 # docs.rs-specific configuration
 [package.metadata.docs.rs]

README.md

@@ -1,4 +1,12 @@
 # parse string to std::time::Duration
+========================================
+<p align="center">
+  <img
+    width="200"
+    src="https://raw.githubusercontent.com/baoyachi/duration-str/master/duration-str.png"
+    alt="duration-str parser"
+  />
+</p>
 
 [![Chrono GitHub Actions](https://github.com/baoyachi/duration-str-rs/actions/workflows/check.yml/badge.svg)](https://github.com/baoyachi/duration-str-rs/actions?query=workflow%3Abuild)
 [![Crates.io](https://img.shields.io/crates/v/duration-str.svg)](https://crates.io/crates/duration-str)

benches/parser_benchmark.rs

@@ -0,0 +1,36 @@
+use criterion::{criterion_group, criterion_main, Criterion};
+use std::time::Duration;
+use winnow::ascii::{digit1, multispace0};
+use winnow::error::ContextError;
+use winnow::token::literal;
+use winnow::Parser;
+
+fn parse_duration() {
+    let duration = duration_str::parse("2h 37m").unwrap();
+    assert_eq!(duration, Duration::new(9420, 0))
+}
+
+fn impeccable_duration() {
+    let input = "2h 37m";
+    (
+        digit1::<_, ContextError>.try_map(str::parse::<usize>),
+        literal('h').value(3600),
+        multispace0,
+        digit1.try_map(str::parse::<usize>),
+        literal('m').value(60),
+    )
+        .map(|(hour, h_unit, _, min, min_unit)| hour * h_unit + min * min_unit)
+        .parse(input)
+        .unwrap();
+}
+
+pub fn duration_str_benchmark(c: &mut Criterion) {
+    c.bench_function("duration_str", |b| b.iter(|| parse_duration()));
+}
+
+pub fn impeccable_benchmark(c: &mut Criterion) {
+    c.bench_function("impeccable", |b| b.iter(|| impeccable_duration()));
+}
+
+criterion_group!(benches, duration_str_benchmark, impeccable_benchmark);
+criterion_main!(benches);

src/lib.rs

@@ -1,5 +1,5 @@
 #![doc(
-    html_logo_url = "https://raw.githubusercontent.com/baoyachi/duration-rs/master/duration-str.png"
+    html_logo_url = "https://raw.githubusercontent.com/baoyachi/duration-str/master/duration-str.png"
 )]
 //! Parse string to `Duration` .
 //!