Prefer clone_from over assign

multigrid/src/file.rs

@@ -38,8 +38,7 @@ impl OutputThread {
         match self.rx.as_ref().unwrap().try_recv() {
             Ok(mut copy_fields) => {
                 for (from, to) in fields.iter().zip(copy_fields.iter_mut()) {
-                    use integrate::Integrable;
-                    euler::Field::assign(to, from);
+                    to.clone_from(&from);
                 }
                 self.tx
                     .as_ref()

multigrid/src/main.rs

@@ -30,17 +30,7 @@ pub(crate) static MULTITHREAD: AtomicBool = AtomicBool::new(false);
 impl integrate::Integrable for System {
     type State = Vec<euler::Field>;
     type Diff = Vec<euler::Diff>;
-    fn assign(s: &mut Self::State, o: &Self::State) {
-        if MULTITHREAD.load(Ordering::Acquire) {
-            s.par_iter_mut()
-                .zip(o.par_iter())
-                .for_each(|(s, o)| euler::Field::assign(s, o))
-        } else {
-            s.iter_mut()
-                .zip(o.iter())
-                .for_each(|(s, o)| euler::Field::assign(s, o))
-        }
-    }
+
     fn scaled_add(s: &mut Self::State, o: &Self::Diff, scale: Float) {
         if MULTITHREAD.load(Ordering::Acquire) {
             s.par_iter_mut()