add sbp xi/eta benches

sbp/benches/sbpoperators.rs

@@ -0,0 +1,52 @@
+use criterion::{criterion_group, criterion_main, Criterion};
+use sbp::operators::{self, SbpOperator2d};
+use sbp::Float;
+
+fn performance_benchmark(c: &mut Criterion) {
+    let mut group = c.benchmark_group("SBPoperators");
+    group.sample_size(25);
+
+    let w = 64;
+    let h = 64;
+
+    let x = ndarray::Array2::from_shape_fn((w, h), |(j, i)| (j * h + i) as Float);
+
+    group.bench_function("upwind4 diffxi", |b| {
+        let mut res = x.clone();
+        b.iter(|| operators::Upwind4.diffxi(x.view(), res.view_mut()))
+    });
+    group.bench_function("upwind9 diffxi", |b| {
+        let mut res = x.clone();
+        b.iter(|| operators::Upwind9.diffxi(x.view(), res.view_mut()))
+    });
+    group.bench_function("trad4 diffxi", |b| {
+        let mut res = x.clone();
+        b.iter(|| operators::SBP4.diffxi(x.view(), res.view_mut()))
+    });
+    group.bench_function("trad8 diffxi", |b| {
+        let mut res = x.clone();
+        b.iter(|| operators::SBP8.diffxi(x.view(), res.view_mut()))
+    });
+
+    group.bench_function("upwind4 diffeta", |b| {
+        let mut res = x.clone();
+        b.iter(|| operators::Upwind4.diffeta(x.view(), res.view_mut()))
+    });
+    group.bench_function("upwind9 diffeta", |b| {
+        let mut res = x.clone();
+        b.iter(|| operators::Upwind9.diffeta(x.view(), res.view_mut()))
+    });
+    group.bench_function("trad4 diffeta", |b| {
+        let mut res = x.clone();
+        b.iter(|| operators::SBP4.diffeta(x.view(), res.view_mut()))
+    });
+    group.bench_function("trad8 diffeta", |b| {
+        let mut res = x.clone();
+        b.iter(|| operators::SBP8.diffeta(x.view(), res.view_mut()))
+    });
+
+    group.finish();
+}
+
+criterion_group!(benches, performance_benchmark);
+criterion_main!(benches);