slightly fewer msg/op for efficient broadcast

gg-broadcast/src/main.rs

@@ -58,20 +58,24 @@ impl BCaster {
             } else {
                 self.store.clone()
             };
-            for v in self.store.iter().filter(|_| rng.gen_bool(0.20)) {
+            for v in self.store.iter().filter(|_| rng.gen_bool(0.10)) {
                 goss.insert(*v);
             }
-            if !goss.is_empty() && rng.gen_bool(0.5) {
+            if !goss.is_empty() && rng.gen_bool(0.6) {
                 let goss: Vec<_> = goss.into_iter().collect();
                 let payload: Payload = [("goss".to_string(), goss.into())].into_iter().collect();
                 let body = Body::from_type("gossip").with_payload(payload);
                 runner.send(node, body.clone());
+            }
+        }
+
         let other = &self.others[rng.gen_range(0..self.others.len())];
+        let goss: Vec<_> = self.store.iter().cloned().collect();
+        let payload: Payload = [("goss".to_string(), goss.into())].into_iter().collect();
+        let body = Body::from_type("gossip").with_payload(payload);
         runner.send(other, body);
     }
 }
-    }
-}
 
 impl Node for BCaster {
     fn handle(&mut self, runner: &Runner, req: Message) {