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feat: count specialization for addrs iterators #25

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Merged
3Hren merged 1 commit into from
Apr 13, 2026
Merged

feat: count specialization for addrs iterators #25

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27 changes: 26 additions & 1 deletion benches/net.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -75,13 +75,38 @@ fn bench_net_addrs(c: &mut Criterion) {
fn bench_net_addrs_count(c: &mut Criterion) {
let mut group = c.benchmark_group("netip");

group.throughput(Throughput::Elements(256));
group.bench_function("Ipv4Network::addrs count /24", |b| {
let net = Ipv4Network::parse("77.88.55.0/24").unwrap();
b.iter(|| {
core::hint::black_box(net.addrs().count());
});
});

group.bench_function("Ipv6Network::addrs count /120", |b| {
let net = Ipv6Network::parse("2a02:6b8:c00::1234:0:0/120").unwrap();
b.iter(|| {
core::hint::black_box(net.addrs().count());
});
});

group.bench_function("Ipv6Network::addrs count /112", |b| {
let net = Ipv6Network::parse("2a02:6b8:c00::1234:0:0/112").unwrap();
b.iter(|| {
core::hint::black_box(net.addrs().count());
});
});

group.bench_function("Ipv6Network::addrs count non-contiguous 8 host bits", |b| {
let net = Ipv6Network::new(
Ipv6Addr::new(0x2a02, 0x6b8, 0xc00, 0, 0, 0x1234, 0, 0),
Ipv6Addr::new(0xffff, 0xffff, 0xff00, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff),
);
b.iter(|| {
core::hint::black_box(net.addrs().count());
});
});

group.finish();
}

fn bench_intersection(c: &mut Criterion) {
Expand Down
11 changes: 11 additions & 0 deletions src/net.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1359,6 +1359,11 @@ impl Iterator for Ipv4NetworkAddrs {
)))
}

#[inline]
fn count(self) -> usize {
self.len()
}

#[inline]
fn size_hint(&self) -> (usize, Option<usize>) {
if self.front > self.back {
Expand Down Expand Up @@ -2404,6 +2409,12 @@ impl Iterator for Ipv6NetworkAddrs {
)))
}

#[inline]
fn count(self) -> usize {
let (n, ..) = self.size_hint();
n
}

#[inline]
fn size_hint(&self) -> (usize, Option<usize>) {
if self.front > self.back {
Expand Down
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