I love performance

src/lib.rs

@@ -34,7 +34,9 @@ impl Adjacencies {
 
     pub fn reset(&mut self) {
         self.amap.iter_mut().for_each(|bitvec| {
-            bitvec.clear();
+            if bitvec.any() {
+                bitvec.clear();
+            }
         })
     }
 
@@ -45,7 +47,7 @@ impl Adjacencies {
         })
     }
 
-    fn intersect(&self, other: &Adjacencies) -> Adjacencies {
+    pub fn intersect(&self, other: &Adjacencies) -> Adjacencies {
         Adjacencies {
             amap: self
                 .amap
@@ -154,10 +156,6 @@ impl Seating {
         }
     }
 
-    fn make_clone(&self) -> Self {
-        self.clone()
-    }
-
     fn empty_table_coords(&self) -> Vec<(usize, Side)> {
         self.people_top
             .iter()

src/main.rs

@@ -7,16 +7,17 @@ use std::{
 use shuffles::*;
 
 fn main() {
-    for size in 0..17 {
+    for size in 0..18 {
         let table = Seating::make_seating(size);
         println!("We have a table\n{table}");
         let mut corot = table.calc_alternatives(size);
         println!("searching size {size}");
+        let mut total = 0;
         loop {
             match Pin::new(&mut corot).resume(()) {
-                CoroutineState::Yielded(val) => println!("found setting\n{val}"),
+                CoroutineState::Yielded(_val) => total += 1,
                 CoroutineState::Complete(total_checked) => {
-                    println!("checked {total_checked} in total");
+                    println!("checked {total_checked} in total to find {total} valid alternatives");
                     break;
                 }
             }