diff --git a/idna/benches/all.rs b/idna/benches/all.rs
index c59c42335..e39e5bd2f 100644
--- a/idna/benches/all.rs
+++ b/idna/benches/all.rs
@@ -49,6 +49,46 @@ fn to_ascii_merged(bench: &mut Bencher) {
     bench.iter(|| config.to_ascii(black_box(encoded)));
 }
 
+fn to_ascii_cow_plain(bench: &mut Bencher) {
+    let encoded = "example.com".as_bytes();
+    bench.iter(|| idna::domain_to_ascii_cow(black_box(encoded), idna::AsciiDenyList::URL));
+}
+
+fn to_ascii_cow_leading_digit(bench: &mut Bencher) {
+    let encoded = "1test.example".as_bytes();
+    bench.iter(|| idna::domain_to_ascii_cow(black_box(encoded), idna::AsciiDenyList::URL));
+}
+
+fn to_ascii_cow_unicode_mixed(bench: &mut Bencher) {
+    let encoded = "مثال.example".as_bytes();
+    bench.iter(|| idna::domain_to_ascii_cow(black_box(encoded), idna::AsciiDenyList::URL));
+}
+
+fn to_ascii_cow_punycode_mixed(bench: &mut Bencher) {
+    let encoded = "xn--mgbh0fb.example".as_bytes();
+    bench.iter(|| idna::domain_to_ascii_cow(black_box(encoded), idna::AsciiDenyList::URL));
+}
+
+fn to_ascii_cow_unicode_ltr(bench: &mut Bencher) {
+    let encoded = "නම.උදාහරණ".as_bytes();
+    bench.iter(|| idna::domain_to_ascii_cow(black_box(encoded), idna::AsciiDenyList::URL));
+}
+
+fn to_ascii_cow_punycode_ltr(bench: &mut Bencher) {
+    let encoded = "xn--r0co.xn--ozc8dl2c3bxd".as_bytes();
+    bench.iter(|| idna::domain_to_ascii_cow(black_box(encoded), idna::AsciiDenyList::URL));
+}
+
+fn to_ascii_cow_unicode_rtl(bench: &mut Bencher) {
+    let encoded = "الاسم.مثال".as_bytes();
+    bench.iter(|| idna::domain_to_ascii_cow(black_box(encoded), idna::AsciiDenyList::URL));
+}
+
+fn to_ascii_cow_punycode_rtl(bench: &mut Bencher) {
+    let encoded = "xn--mgba0b1dh.xn--mgbh0fb".as_bytes();
+    bench.iter(|| idna::domain_to_ascii_cow(black_box(encoded), idna::AsciiDenyList::URL));
+}
+
 benchmark_group!(
     benches,
     to_unicode_puny_label,
@@ -58,5 +98,13 @@ benchmark_group!(
     to_ascii_already_puny_label,
     to_ascii_simple,
     to_ascii_merged,
+    to_ascii_cow_plain,
+    to_ascii_cow_leading_digit,
+    to_ascii_cow_unicode_mixed,
+    to_ascii_cow_punycode_mixed,
+    to_ascii_cow_unicode_ltr,
+    to_ascii_cow_punycode_ltr,
+    to_ascii_cow_unicode_rtl,
+    to_ascii_cow_punycode_rtl,
 );
 benchmark_main!(benches);
diff --git a/url/benches/parse_url.rs b/url/benches/parse_url.rs
index cc87dda5c..3c9cd175e 100644
--- a/url/benches/parse_url.rs
+++ b/url/benches/parse_url.rs
@@ -19,5 +19,73 @@ fn long(bench: &mut Bencher) {
     bench.iter(|| black_box(url).parse::<Url>().unwrap());
 }
 
-benchmark_group!(benches, short, long);
+fn plain(bench: &mut Bencher) {
+    let url = "https://example.com/";
+
+    bench.bytes = url.len() as u64;
+    bench.iter(|| black_box(url).parse::<Url>().unwrap());
+}
+
+fn leading_digit(bench: &mut Bencher) {
+    let url = "https://1test.example/";
+
+    bench.bytes = url.len() as u64;
+    bench.iter(|| black_box(url).parse::<Url>().unwrap());
+}
+
+fn unicode_mixed(bench: &mut Bencher) {
+    let url = "https://مثال.example/";
+
+    bench.bytes = url.len() as u64;
+    bench.iter(|| black_box(url).parse::<Url>().unwrap());
+}
+
+fn punycode_mixed(bench: &mut Bencher) {
+    let url = "https://xn--mgbh0fb.example/";
+
+    bench.bytes = url.len() as u64;
+    bench.iter(|| black_box(url).parse::<Url>().unwrap());
+}
+
+fn unicode_ltr(bench: &mut Bencher) {
+    let url = "https://නම.උදාහරණ/";
+
+    bench.bytes = url.len() as u64;
+    bench.iter(|| black_box(url).parse::<Url>().unwrap());
+}
+
+fn punycode_ltr(bench: &mut Bencher) {
+    let url = "https://xn--r0co.xn--ozc8dl2c3bxd/";
+
+    bench.bytes = url.len() as u64;
+    bench.iter(|| black_box(url).parse::<Url>().unwrap());
+}
+
+fn unicode_rtl(bench: &mut Bencher) {
+    let url = "https://الاسم.مثال/";
+
+    bench.bytes = url.len() as u64;
+    bench.iter(|| black_box(url).parse::<Url>().unwrap());
+}
+
+fn punycode_rtl(bench: &mut Bencher) {
+    let url = "https://xn--mgba0b1dh.xn--mgbh0fb/";
+
+    bench.bytes = url.len() as u64;
+    bench.iter(|| black_box(url).parse::<Url>().unwrap());
+}
+
+benchmark_group!(
+    benches,
+    short,
+    long,
+    plain,
+    leading_digit,
+    unicode_mixed,
+    punycode_mixed,
+    unicode_ltr,
+    punycode_ltr,
+    unicode_rtl,
+    punycode_rtl,
+);
 benchmark_main!(benches);