dumb iterator implemented ith faster hashmap

src/scene.rs

@@ -4,6 +4,7 @@ use anyhow::Result;
 use cgmath::{vec2, vec3};
 
 use std::collections::HashMap;
+use rustc_hash::FxHashMap;
 
 use crate::app_data::AppData;
 use crate::buffer;
@@ -13,7 +14,7 @@ use crate::primitives::cube::Cube;
 extern crate rand;
 use rand::Rng;
 
-const CHUNK_SIZE: usize = 100;
+const CHUNK_SIZE: usize = 500;
 
 #[derive(Clone, Debug, Default)]
 pub struct Scene {
@@ -80,12 +81,12 @@ impl Scene {
 #[derive(Clone, Debug)]
 struct Chunk {
     //todo change to hashmap?
-    blocks: HashMap<cgmath::Vector3<u32>, Cube>,
+    blocks: HashMap<cgmath::Vector3<u32>, Cube, rustc_hash::FxBuildHasher>,
 }
 
 impl Chunk {
     pub fn create() -> Result<Self> {
-        let mut map = HashMap::new();
+        let mut map: HashMap<cgmath::Vector3<u32>, Cube, rustc_hash::FxBuildHasher> = FxHashMap::default();
         Ok(Self {
             blocks: map
         })