tests: add an env variable bench for testing

Author: art049

.github/workflows/ci.yml

@@ -67,6 +67,8 @@ jobs:
 
       - name: Run the benchmarks
         uses: CodSpeedHQ/action@main
+        env:
+          MY_ENV_VAR: "YES"
         with:
           run: cargo codspeed run
           token: ${{ secrets.CODSPEED_TOKEN }}
@@ -89,6 +91,8 @@ jobs:
 
       - name: Run the benchmarks
         uses: CodSpeedHQ/action@main
+        env:
+          MY_ENV_VAR: "YES"
         with:
           run: cargo codspeed run
           token: ${{ secrets.CODSPEED_TOKEN }}

crates/divan_compat/examples/Cargo.toml

@@ -33,6 +33,10 @@ harness = false
 name = "time_scale"
 harness = false
 
+[[bench]]
+name = "env"
+harness = false
+
 [[bench]]
 name = "the_algorithms"
 harness = false

crates/divan_compat/examples/benches/env.rs

@@ -0,0 +1,9 @@
+fn main() {
+    divan::main();
+}
+
+#[divan::bench]
+fn print_env_hello() {
+    let env_var = std::env::var("MY_ENV_VAR").unwrap_or("not set".to_string());
+    println!("MY_ENV_VAR is {}", env_var);
+}