Prescient only on hit path

Author: laurmaedje

src/cache.rs

@@ -122,23 +122,7 @@ where
         if i != u32::MAX {
             return cache.0.read().values[i as usize].clone();
         }
-
-        // Execute the function with the new constraints hooked in.
-        let sink = |call: In::Call, hash: u128| {
-            if call.is_mutable() {
-                list.lock().mutable.push(call);
-                true
-            } else {
-                list.lock().immutable.insert(call, hash)
-            }
-        };
-        let value = func(input.retrack(sink, bump));
-        cache.0.write().values.push(value.clone());
-        return value;
-    }
-
-    // Check if there is a cached output.
-    if let Some((i, value, mutable)) = cache.0.read().lookup::<In>(key, &input) {
+    } else if let Some((i, value, mutable)) = cache.0.read().lookup::<In>(key, &input) {
         PRESCIENCE_WRITE.hit(i);
 
         #[cfg(feature = "testing")]