Add benchmarks of tiny_vec macro

Cargo.toml

@@ -40,6 +40,14 @@ all-features = true
 [workspace]
 members = ["fuzz"]
 
+[dev-dependencies]
+criterion = "0.3.0"
+
 [[test]]
 name = "tinyvec"
 required-features = ["alloc"]
+
+[[bench]]
+name = "macros"
+harness = false
+required-features = ["alloc"]

benches/macros.rs

@@ -0,0 +1,48 @@
+use criterion::{criterion_group, criterion_main, Criterion};
+
+use tinyvec::tiny_vec;
+
+fn bench_tinyvec_macro(c: &mut Criterion) {
+  let mut g = c.benchmark_group("tinyvec_macro");
+
+  g.bench_function("0 of 32", |b| {
+    b.iter(|| tiny_vec!([u8; 32]));
+  });
+
+  g.bench_function("16 of 32", |b| {
+    b.iter(||
+      tiny_vec!([u8; 32],
+        1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
+      ));
+  });
+
+  g.bench_function("32 of 32", |b| {
+    b.iter(||
+      tiny_vec!([u8; 32],
+        1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
+        17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32,
+      ));
+  });
+
+  g.bench_function("33 of 32", |b| {
+    b.iter(||
+      tiny_vec!([u8; 32],
+        1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
+        17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32,
+        33,
+      ));
+  });
+
+  g.bench_function("64 of 32", |b| {
+    b.iter(||
+      tiny_vec!([u8; 32],
+        1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
+        17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32,
+        33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48,
+        49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64,
+      ));
+  });
+}
+
+criterion_group!(benches, bench_tinyvec_macro);
+criterion_main!(benches);