1 files changed, 111 insertions, 0 deletions
diff --git a/vendor/chalk-solve-0.87.0/src/solve/test/bench.rs b/vendor/chalk-solve-0.87.0/src/solve/test/bench.rs
new file mode 100644
index 000000000..6ef6eb1f9
--- /dev/null
+++ b/vendor/chalk-solve-0.87.0/src/solve/test/bench.rs
@@ -0,0 +1,111 @@
+//! Benchmarking tests.
+
+extern crate test;
+use self::test::Bencher;
+
+use crate::db::ChalkDatabase;
+use crate::query::{ProgramSolverChoice, ProgramText};
+use chalk_solve::SolverChoice;
+use ir;
+use std::sync::Arc;
+
+use super::{assert_result, parse_and_lower_goal, parse_and_lower_program};
+
+fn run_bench(
+    program_text: &str,
+    solver_choice: SolverChoice,
+    goal_text: &str,
+    bencher: &mut Bencher,
+    expected: &str,
+) {
+    ChalkDatabase::with_program(Arc::new(program_text.to_string()), solver_choice, |db| {
+        let program = db.lowered_program().unwrap();
+        let env = db.environment().unwrap();
+        ir::tls::set_current_program(&program, || {
+            let goal = parse_and_lower_goal(&program, goal_text).unwrap();
+            let peeled_goal = goal.into_peeled_goal();
+
+            // Execute once to get an expected result.
+            let result = solver_choice.solve_root_goal(&env, &peeled_goal);
+
+            // Check expectation.
+            assert_result(&result, expected);
+
+            // Then do it many times to measure time.
+            bencher.iter(|| solver_choice.solve_root_goal(&env, &peeled_goal));
+        });
+    });
+}
+
+const CYCLEY: &str = "
+trait AsRef<T> { }
+trait Clone { }
+trait Copy where Self: Clone { }
+trait Sized { }
+
+struct i32 { }
+impl Copy for i32 { }
+impl Clone for i32 { }
+impl Sized for i32 { }
+
+struct u32 { }
+impl Copy for u32 { }
+impl Clone for u32 { }
+impl Sized for u32 { }
+
+struct Rc<T> { }
+impl<T> Clone for Rc<T> { }
+impl<T> Sized for Rc<T> { }
+
+struct Box<T> { }
+impl<T> AsRef<T> for Box<T> where T: Sized { }
+impl<T> Clone for Box<T> where T: Clone { }
+impl<T> Sized for Box<T> { }
+
+// Meant to be [T]
+struct Slice<T> where T: Sized { }
+impl<T> Sized for Slice<T> { }
+impl<T> AsRef<Slice<T>> for Slice<T> where T: Sized { }
+
+struct Vec<T> where T: Sized { }
+impl<T> AsRef<Slice<T>> for Vec<T> where T: Sized { }
+impl<T> AsRef<Vec<T>> for Vec<T> where T: Sized { }
+impl<T> Clone for Vec<T> where T: Clone, T: Sized { }
+impl<T> Sized for Vec<T> where T: Sized { }
+
+trait SliceExt
+  where <Self as SliceExt>::Item: Clone
+{
+  type Item;
+}
+
+impl<T> SliceExt for Slice<T>
+  where T: Clone
+{
+  type Item = T;
+}
+";
+
+const CYCLEY_GOAL: &str = "
+forall<T> {
+    if (
+        <Slice<T> as SliceExt>::Item: Clone;
+        <Slice<T> as SliceExt>::Item: Sized;
+        T: Clone;
+        T: Sized
+    ) {
+        T: Sized
+    }
+}
+";
+
+#[bench]
+fn cycley_slg(b: &mut Bencher) {
+    run_bench(
+        CYCLEY,
+        SolverChoice::SLG { max_size: 20 },
+        CYCLEY_GOAL,
+        b,
+        "Unique",
+    );
+}