diff --git a/Cargo.lock b/Cargo.lock
index 1caa840..476a17f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1594,6 +1594,16 @@ version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f9fbbcab51052fe104eb5e5d351cf728d30a5be1fe14d9be8a3b097481fb97de"
 
+[[package]]
+name = "libmimalloc-sys"
+version = "0.1.43"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bf88cd67e9de251c1781dbe2f641a1a3ad66eaae831b8a2c38fbdc5ddae16d4d"
+dependencies = [
+ "cc",
+ "libc",
+]
+
 [[package]]
 name = "libredox"
 version = "0.1.9"
@@ -1702,6 +1712,15 @@ dependencies = [
  "paste",
 ]
 
+[[package]]
+name = "mimalloc"
+version = "0.1.47"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b1791cbe101e95af5764f06f20f6760521f7158f69dbf9d6baf941ee1bf6bc40"
+dependencies = [
+ "libmimalloc-sys",
+]
+
 [[package]]
 name = "miniz_oxide"
 version = "0.8.9"
@@ -2649,6 +2668,7 @@ dependencies = [
  "color-eyre",
  "eframe",
  "fastnbt",
+ "mimalloc",
  "rfd",
  "tracing",
  "tracing-subscriber",
diff --git a/slimeball-gui/Cargo.toml b/slimeball-gui/Cargo.toml
index 9ae74ef..b38af10 100644
--- a/slimeball-gui/Cargo.toml
+++ b/slimeball-gui/Cargo.toml
@@ -7,6 +7,7 @@ edition = "2024"
 color-eyre = "0.6.5"
 eframe = { version = "0.32.0", default-features = false, features = ["accesskit", "default_fonts", "wayland", "web_screen_reader", "wgpu", "x11"] }
 fastnbt = "2.5.0"
+mimalloc = "0.1.47"
 rfd = "0.15.4"
 tracing = { version = "0.1.41", features = ["release_max_level_info", "max_level_debug"] }
 tracing-subscriber = { version = "0.3.19", features = ["env-filter"] }
diff --git a/slimeball-gui/src/main.rs b/slimeball-gui/src/main.rs
index 9d7d3e4..d43a94d 100644
--- a/slimeball-gui/src/main.rs
+++ b/slimeball-gui/src/main.rs
@@ -1,6 +1,7 @@
 use std::path::PathBuf;
 
 use eframe::egui::{self, Color32, Frame};
+use mimalloc::MiMalloc;
 use rfd::FileDialog;
 use tracing::Level;
 use tracing_subscriber::{EnvFilter, prelude::*};
@@ -8,6 +9,9 @@ use tracing_subscriber::{EnvFilter, prelude::*};
 #[macro_use]
 extern crate tracing;
 
+#[global_allocator]
+static GLOBAL: MiMalloc = MiMalloc;
+
 mod anvil;
 
 fn main() {
@@ -33,6 +37,15 @@ struct SlimeballGui {
     file: Option<PathBuf>,
 }
 
+impl eframe::App for SlimeballGui {
+    fn update(&mut self, ui: &egui::Context, frame: &mut eframe::Frame) {
+        match self.file {
+            None => self.show_welcome(ui),
+            Some(_) => self.show_main(ui),
+        }
+    }
+}
+
 impl SlimeballGui {
     fn new(_cc: &eframe::CreationContext<'_>) -> Self {
         // Customize egui here with cc.egui_ctx.set_fonts and cc.egui_ctx.set_visuals.
@@ -41,39 +54,35 @@ impl SlimeballGui {
         // for e.g. egui::PaintCallback.
         Self::default()
     }
-}
 
-impl eframe::App for SlimeballGui {
-    fn update(&mut self, ui: &egui::Context, frame: &mut eframe::Frame) {
-        match self.file {
-            None => {
-                egui::CentralPanel::default().show(ui, |ui| {
-                    ui.vertical_centered(|ui| {
-                        ui.label("No world selected");
-                        if ui.button("Open a world...").clicked() {
-                            self.file = FileDialog::new().pick_folder();
-                        }
-                    });
+    fn show_welcome(&mut self, ui: &egui::Context) {
+        egui::CentralPanel::default().show(ui, |ui| {
+            ui.vertical_centered(|ui| {
+                ui.label("No world selected");
+                if ui.button("Open a world...").clicked() {
+                    self.file = FileDialog::new().pick_folder();
+                }
+            });
+        });
+    }
+
+    fn show_main(&mut self, ui: &egui::Context) {
+        // asserted Some in match arm for render
+        let path = self.file.as_ref().unwrap();
+
+        egui::TopBottomPanel::top("top_panel")
+            .resizable(false)
+            .frame(
+                Frame::new()
+                    .fill(ui.style().visuals.panel_fill)
+                    .inner_margin(16),
+            )
+            .show(ui, |ui| {
+                ui.vertical_centered(|ui| {
+                    ui.heading("Settings");
                 });
-            }
-            Some(ref file) => {
-                egui::TopBottomPanel::top("top_panel")
-                    .resizable(false)
-                    .frame(
-                        Frame::new()
-                            .fill(ui.style().visuals.panel_fill)
-                            .inner_margin(16),
-                    )
-                    .show(ui, |ui| {
-                        ui.vertical_centered(|ui| {
-                            ui.heading("Settings");
-                        });
-                    });
+            });
 
-                egui::CentralPanel::default()
-                    .frame(egui::containers::Frame::NONE.fill(Color32::DARK_GRAY))
-                    .show(ui, |ui| {});
-            }
-        }
+        egui::CentralPanel::default().show(ui, |ui| ui.heading(path.to_string_lossy()));
     }
 }