Add benchmark for HMAC code.

Also, simplify the function a bit. It's faster this way, even though
there's an additional unconditional collect() call now.

1 files changed, 73 insertions, 0 deletions

diff --git a/benches/hashrate_16_hmac.rs b/benches/hashrate_16_hmac.rs
new file mode 100644
index 0000000..9a8deb7
--- /dev/null
+++ b/benches/hashrate_16_hmac.rs
@@ -0,0 +1,73 @@
+mod mock_hashers;
+
+use std::time::Duration;
+
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+use passwordmaker_rs::HashAlgorithm;
+use mock_hashers::Pwm;
+
+fn criterion_bench_16bytes_hmac_typical(c: &mut Criterion) {
+    let pwm = Pwm::new(
+        HashAlgorithm::HmacMd5,
+        passwordmaker_rs::UseLeetWhenGenerating::NotAtAll,
+        "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789`~!@#$%^&*()_-+={}|[]\\:\";'<>?,./",
+        "",
+        "",
+        12,
+        "",
+        ""
+    ).unwrap();
+    c.bench_function("16 bytes HMAC typical", |b| b.iter(|| {
+        pwm.generate(
+            black_box("This is a long string. With many, many characters. For no particular reason.".to_owned()),
+            black_box("And another relatively long string for no reason other than it being long.".to_owned())
+        )
+    }));
+}
+
+fn criterion_bench_16bytes_hmac_full_divide(c: &mut Criterion) {
+    let pwm = Pwm::new(
+        HashAlgorithm::HmacMd5, 
+        passwordmaker_rs::UseLeetWhenGenerating::NotAtAll,
+        "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789`~!@#$%^&*()_-+={}|[]\\:\";'<>?,./",
+        "",
+        "",
+        20,
+        "",
+        ""
+    ).unwrap();
+    c.bench_function("16 bytes HMAC full divide", |b| b.iter(|| {
+        pwm.generate(
+            black_box("This is a long string. With many, many characters. For no particular reason.".to_owned()),
+            black_box("And another relatively long string for no reason other than it being long.".to_owned())
+        )
+    }));
+}
+
+fn criterion_bench_16bytes_hmac_worst_case(c: &mut Criterion) {
+    let pwm = Pwm::new(
+        HashAlgorithm::HmacMd5, 
+        passwordmaker_rs::UseLeetWhenGenerating::NotAtAll,
+        "XY",
+        "",
+        "",
+        128,
+        "",
+        ""
+    ).unwrap();
+    c.bench_function("16 bytes HMAC worst case", |b| b.iter(|| {
+        pwm.generate(
+            black_box("This is a long string. With many, many characters. For no particular reason.".to_owned()),
+            black_box("And another relatively long string for no reason other than it being long.".to_owned())
+        )
+    }));
+}
+
+criterion_group!(name = benches;
+    // This can be any expression that returns a `Criterion` object.
+    config = Criterion::default().significance_level(0.02).sample_size(500).measurement_time(Duration::from_secs(10));
+    targets = criterion_bench_16bytes_hmac_typical,
+    criterion_bench_16bytes_hmac_full_divide,
+    criterion_bench_16bytes_hmac_worst_case,
+);
+criterion_main!(benches);