echo: add benchmark (#12091)

Author: oech3

.github/workflows/benchmarks.yml

@@ -36,6 +36,7 @@ jobs:
           uu_dd,
           uu_df,
           uu_du,
+          uu_echo,
           uu_expand,
           uu_fold,
           uu_hostname,

Cargo.lock

@@ -27,3 +27,11 @@ fluent = { workspace = true }
 [[bin]]
 name = "echo"
 path = "src/main.rs"
+
+[dev-dependencies]
+divan = { workspace = true }
+uucore = { workspace = true, features = ["benchmark"] }
+
+[[bench]]
+name = "echo_bench"
+harness = false

src/uu/echo/Cargo.toml

@@ -0,0 +1,22 @@
+// This file is part of the uutils coreutils package.
+//
+// For the full copyright and license information, please view the LICENSE
+// file that was distributed with this source code.
+
+use divan::{Bencher, black_box};
+use uu_echo::uumain;
+use uucore::benchmark::run_util_function;
+
+/// Benchmark multiple consecutive invocations
+#[divan::bench]
+fn echo_consecutive_calls(bencher: Bencher) {
+    bencher.bench(|| {
+        for _ in 0..100 {
+            black_box(run_util_function(uumain, &["Hello World"]));
+        }
+    });
+}
+
+fn main() {
+    divan::main();
+}