Add basic benchmark to Sobol sampler.

Cargo.lock

@@ -608,6 +608,10 @@ checksum = "1d51f5df5af43ab3f1360b429fa5e0152ac5ce8c0bd6485cae490332e96846a8"
 [[package]]
 name = "sobol"
 version = "0.1.0"
+dependencies = [
+ "bencher",
+ "rand 0.6.5",
+]
 
 [[package]]
 name = "spectral_upsampling"

sub_crates/sobol/Cargo.toml

@@ -9,3 +9,11 @@ build = "build.rs"
 [lib]
 name = "sobol"
 path = "src/lib.rs"
+
+[dev-dependencies]
+rand = "0.6"
+bencher = "0.1.5"
+
+[[bench]]
+name = "bench"
+harness = false

sub_crates/sobol/benches/bench.rs

@@ -0,0 +1,34 @@
+use bencher::{benchmark_group, benchmark_main, black_box, Bencher};
+use rand::{rngs::SmallRng, FromEntropy, Rng};
+use sobol::sample_4d;
+
+//----
+
+fn gen_1000_samples(bench: &mut Bencher) {
+    bench.iter(|| {
+        for i in 0..1000u32 {
+            black_box(sample_4d(i, 0, 1234567890));
+        }
+    });
+}
+
+fn gen_1000_samples_incoherent(bench: &mut Bencher) {
+    let mut rng = SmallRng::from_entropy();
+    bench.iter(|| {
+        let s = rng.gen::<u32>();
+        let d = rng.gen::<u32>();
+        let seed = rng.gen::<u32>();
+        for i in 0..1000u32 {
+            black_box(sample_4d(
+                s.wrapping_add(i).wrapping_mul(512),
+                d.wrapping_add(i).wrapping_mul(97) % 32,
+                seed,
+            ));
+        }
+    });
+}
+
+//----
+
+benchmark_group!(benches, gen_1000_samples, gen_1000_samples_incoherent,);
+benchmark_main!(benches);