From e3b8e2dadec5009ec1c3de72a202583f65129993 Mon Sep 17 00:00:00 2001
From: Dennis Kobert <dennis@kobert.dev>
Date: Sun, 12 Jan 2020 20:06:33 +0100
Subject: Improve the hashing by not saving invalid results

---
 src/solvers/gpu/output.rs | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

(limited to 'src/solvers/gpu')

diff --git a/src/solvers/gpu/output.rs b/src/solvers/gpu/output.rs
index 9030586..4e52ab4 100644
--- a/src/solvers/gpu/output.rs
+++ b/src/solvers/gpu/output.rs
@@ -7,6 +7,7 @@ struct InBuffer {
     receiver: Receiver<Message>,
     row_requests: HashMap<u64, Vec<Vec<u32>>>,
     results_requests: HashMap<u64, ResultMessage>,
+    banned_requests: HashSet<u64>,
 }
 
 impl InBuffer {
@@ -15,6 +16,7 @@ impl InBuffer {
             receiver,
             row_requests: HashMap::new(),
             results_requests: HashMap::new(),
+            banned_requests: HashSet::new(),
         }
     }
     fn read(&mut self) -> Option<Vec<RowResult>> {
@@ -34,10 +36,17 @@ impl InBuffer {
                             result_walls,
                         ));
                     } else {
-                        self.results_requests.insert(results.id, results);
+                        if results.data.iter().any(|x| *x != 0) {
+                            self.results_requests.insert(results.id, results);
+                        } else {
+                            self.banned_requests.insert(results.id);
+                        }
                     }
                 }
                 Message::OutputMessage((id, output)) => {
+                    if self.banned_requests.remove(&id) {
+                        continue;
+                    }
                     if let Some(results) = self.results_requests.get(&id) {
                         return Some(Self::calc_results(
                             results.valid_walls().as_ref(),
-- 
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