From f9a50e8b4e5baae3f43bf906b079221f56bc2e00 Mon Sep 17 00:00:00 2001
From: Parnic <github@parnic.com>
Date: Sat, 24 Dec 2022 15:43:33 -0600
Subject: [PATCH] Small improvement to day 24

This is the best I have been able to do so far without making vec2's x/y no longer readonly (and then having to clean up after myself each time I leave this scope, which can happen in 3 places...) and since it's a relatively simple change (doesn't kill the ergonomics too terribly), I'm gonna roll with it for now.

Part 2 110ms -> 75ms. I thought GetOrthogonalNeighbors was as fast as I could make it, but maybe there are better ways to get this same result...
---
 src/24.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/24.cs b/src/24.cs
index 34a730c..81e6397 100644
--- a/src/24.cs
+++ b/src/24.cs
@@ -218,8 +218,9 @@ internal class Day24 : Day
             }
 
             // queue up all neighbor possibilities
-            foreach (var n in q.pos.GetOrthogonalNeighbors())
+            foreach (var dir in ivec2.FOURWAY)
             {
+                var n = q.pos + dir;
                 if (n == dest)
                 {
                     if (q.steps + 1 < minSteps)