feat(init): Generate main_bench.ts by default (#16786)

This commit changes "deno init" to generate "main_bench.ts" file
which scaffold two example bench cases.

2 files changed, 14 insertions, 0 deletions

diff --git a/cli/tools/init/mod.rs b/cli/tools/init/mod.rs
index 96b5b9a46..bb11dba69 100644
--- a/cli/tools/init/mod.rs
+++ b/cli/tools/init/mod.rs
@@ -40,6 +40,8 @@ pub async fn init_project(init_flags: InitFlags) -> Result<(), AnyError> {
   let main_test_ts = include_str!("./templates/main_test.ts")
     .replace("{CURRENT_STD_URL}", deno_std::CURRENT_STD_URL.as_str());
   create_file(&dir, "main_test.ts", &main_test_ts)?;
+  let main_bench_ts = include_str!("./templates/main_bench.ts");
+  create_file(&dir, "main_bench.ts", main_bench_ts)?;
 
   create_file(&dir, "deno.jsonc", include_str!("./templates/deno.jsonc"))?;
 
@@ -62,5 +64,8 @@ pub async fn init_project(init_flags: InitFlags) -> Result<(), AnyError> {
   info!("");
   info!("  {}", colors::gray("// Run the tests"));
   info!("  deno test");
+  info!("");
+  info!("  {}", colors::gray("// Run the benchmarks"));
+  info!("  deno bench");
   Ok(())
 }
diff --git a/cli/tools/init/templates/main_bench.ts b/cli/tools/init/templates/main_bench.ts
new file mode 100644
index 000000000..5867ca0a6
--- /dev/null
+++ b/cli/tools/init/templates/main_bench.ts
@@ -0,0 +1,9 @@
+import { add } from "./main.ts";
+
+Deno.bench(function addSmall() {
+  add(1, 2);
+});
+
+Deno.bench(function addBig() {
+  add(2 ** 32, 2 ** 32);
+});