benches: add bench_frompyobject

Cargo.toml

@@ -91,6 +91,10 @@ harness = false
 name = "bench_dict"
 harness = false
 
+[[bench]]
+name = "bench_frompyobject"
+harness = false
+
 [[bench]]
 name = "bench_gil"
 harness = false

benches/bench_frompyobject.rs

@@ -0,0 +1,26 @@
+use criterion::{criterion_group, criterion_main, Bencher, Criterion};
+
+use pyo3::{prelude::*, types::PyString};
+
+#[derive(FromPyObject)]
+enum ManyTypes {
+    Int(i32),
+    Bytes(Vec<u8>),
+    String(String)
+}
+
+fn enum_from_pyobject(b: &mut Bencher) {
+    Python::with_gil(|py| {
+        let obj = PyString::new(py, "hello world");
+        b.iter(|| {
+            let _: ManyTypes = obj.extract().unwrap();
+        });
+    })
+}
+
+fn criterion_benchmark(c: &mut Criterion) {
+    c.bench_function("enum_from_pyobject", enum_from_pyobject);
+}
+
+criterion_group!(benches, criterion_benchmark);
+criterion_main!(benches);