chore: checkpoint before Python removal

vendor/thread_local/benches/thread_local.rs

@@ -0,0 +1,25 @@
+use criterion::{black_box, BatchSize};
+
+use thread_local::ThreadLocal;
+
+fn main() {
+    let mut c = criterion::Criterion::default().configure_from_args();
+
+    c.bench_function("get", |b| {
+        let local = ThreadLocal::new();
+        local.get_or(|| Box::new(0));
+        b.iter(|| {
+            black_box(local.get());
+        });
+    });
+
+    c.bench_function("insert", |b| {
+        b.iter_batched_ref(
+            ThreadLocal::new,
+            |local| {
+                black_box(local.get_or(|| 0));
+            },
+            BatchSize::SmallInput,
+        )
+    });
+}