From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Sun, 7 Mar 2021 13:15:04 -0800
Subject: [PATCH] Do not run raytrace logic for AIR

Saves approx. 5% for the raytrace call, as most (expensive)
raytracing tends to go through air and returning early is an
easy win. The remaining problems with this function
are mostly with the block getting itself.

diff --git a/src/main/java/net/minecraft/world/level/BlockGetter.java b/src/main/java/net/minecraft/world/level/BlockGetter.java
index b087dd208f62856c03db3aa2ae28ffc98d76e649..6200a8ab4f7b2c40e7139cfb90a62f42c5828de2 100644
--- a/src/main/java/net/minecraft/world/level/BlockGetter.java
+++ b/src/main/java/net/minecraft/world/level/BlockGetter.java
@@ -84,6 +84,7 @@ public interface BlockGetter extends LevelHeightAccessor {
                 return BlockHitResult.miss(raytrace1.getTo(), Direction.getNearest(vec3d.x, vec3d.y, vec3d.z), new BlockPos(raytrace1.getTo()));
             }
             // Paper end
+            if (iblockdata.isAir()) return null; // Paper - optimise air cases
             FluidState fluid = iblockdata.getFluidState(); // Paper - don't need to go to world state again
             Vec3 vec3d = raytrace1.getFrom();
             Vec3 vec3d1 = raytrace1.getTo();