diff --git a/Cargo.toml b/Cargo.toml
index a157ec9..b448b24 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,6 +9,10 @@ repository = "https://github.com/Titaniumtown/YTBN-Graphing-Software"
 [lib]
 crate-type = ["cdylib"]
 
+[features]
+threading = ["async-lock", "rayon"]
+
+
 [profile.release]
 debug = false
 codegen-units = 1
@@ -48,7 +52,9 @@ phf_codegen = "0.10.0"
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 instant = { version = "0.1.12" }
 tracing-subscriber = "0.3.9"
-rayon = { git = "https://github.com/rayon-rs/rayon.git" }
+rayon = { git = "https://github.com/rayon-rs/rayon.git", optional = true }
+async-lock = { git = "https://github.com/smol-rs/async-lock.git", optional = true }
+
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
 instant = { version = "0.1.12", features = ["wasm-bindgen"] }
diff --git a/src/egui_app.rs b/src/egui_app.rs
index 0c61b2e..83cff40 100644
--- a/src/egui_app.rs
+++ b/src/egui_app.rs
@@ -13,7 +13,7 @@ use epi::Frame;
 use instant::Duration;
 use std::{collections::BTreeMap, io::Read, ops::BitXorAssign, str};
 
-#[cfg(not(target_arch = "wasm32"))]
+#[cfg(threading)]
 use rayon::iter::{IndexedParallelIterator, ParallelIterator};
 
 // Stores data loaded from files
diff --git a/src/function.rs b/src/function.rs
index 38984ea..8e29d5e 100644
--- a/src/function.rs
+++ b/src/function.rs
@@ -11,7 +11,7 @@ use egui::{
 use epaint::Color32;
 use std::fmt::{self, Debug};
 
-#[cfg(not(target_arch = "wasm32"))]
+#[cfg(threading)]
 use rayon::iter::ParallelIterator;
 
 /// Represents the possible variations of Riemann Sums
@@ -94,6 +94,20 @@ impl FunctionEntry {
 		self.integral = integral;
 	}
 
+	fn get_sum_func(&self, sum: Riemann) -> FunctionHelper {
+		match sum {
+			Riemann::Left => {
+				FunctionHelper::new(|left_x: f64, _: f64| -> f64 { self.function.get(left_x) })
+			}
+			Riemann::Right => {
+				FunctionHelper::new(|_: f64, right_x: f64| -> f64 { self.function.get(right_x) })
+			}
+			Riemann::Middle => FunctionHelper::new(|left_x: f64, right_x: f64| -> f64 {
+				(self.function.get(left_x) + self.function.get(right_x)) / 2.0
+			}),
+		}
+	}
+
 	/// Creates and does the math for creating all the rectangles under the
 	/// graph
 	fn integral_rectangles(
@@ -107,6 +121,8 @@ impl FunctionEntry {
 
 		let step = (integral_min_x - integral_max_x).abs() / (*integral_num as f64);
 
+		let sum_func = self.get_sum_func(*sum);
+
 		let data2: Vec<(f64, f64)> = dyn_iter(&step_helper(*integral_num, &integral_min_x, &step))
 			.map(|x| {
 				let step_offset = step * x.signum(); // store the offset here so it doesn't have to be calculated multiple times
@@ -117,18 +133,13 @@ impl FunctionEntry {
 					false => (x2, *x),
 				};
 
-				let y = match sum {
-					Riemann::Left => self.function.get(left_x),
-					Riemann::Right => self.function.get(right_x),
-					Riemann::Middle => {
-						(self.function.get(left_x) + self.function.get(right_x)) / 2.0
-					}
-				};
+				let y = sum_func.get(left_x, right_x);
 
 				(x + (step_offset / 2.0), y)
 			})
 			.filter(|(_, y)| !y.is_nan())
 			.collect();
+
 		let area = data2.iter().map(|(_, y)| y * step).sum();
 
 		(data2, area)
diff --git a/src/misc.rs b/src/misc.rs
index 3e58490..ab81b76 100644
--- a/src/misc.rs
+++ b/src/misc.rs
@@ -2,10 +2,10 @@ use eframe::egui::plot::{Line, Points, Value as EguiValue, Values};
 use itertools::Itertools;
 use serde_json::Value as JsonValue;
 
-#[cfg(not(target_arch = "wasm32"))]
+#[cfg(threading)]
 use rayon::prelude::*;
 
-#[cfg(target_arch = "wasm32")]
+#[cfg(not(threading))]
 pub fn dyn_iter<'a, T>(input: &'a Vec<T>) -> impl Iterator<Item = &'a T>
 where
 	&'a [T]: IntoIterator,
@@ -13,7 +13,7 @@ where
 	input.iter()
 }
 
-#[cfg(not(target_arch = "wasm32"))]
+#[cfg(threading)]
 pub fn dyn_iter<'a, I>(input: &'a I) -> <&'a I as IntoParallelIterator>::Iter
 where
 	&'a I: IntoParallelIterator,
@@ -21,7 +21,7 @@ where
 	input.par_iter()
 }
 
-#[cfg(target_arch = "wasm32")]
+#[cfg(not(threading))]
 pub fn dyn_mut_iter<'a, T>(input: &'a mut Vec<T>) -> impl Iterator<Item = &'a mut T>
 where
 	&'a mut [T]: IntoIterator,
@@ -29,7 +29,7 @@ where
 	input.iter_mut()
 }
 
-#[cfg(not(target_arch = "wasm32"))]
+#[cfg(threading)]
 pub fn dyn_mut_iter<'a, I>(input: &'a mut I) -> <&'a mut I as IntoParallelIterator>::Iter
 where
 	&'a mut I: IntoParallelIterator,
@@ -37,6 +37,35 @@ where
 	input.par_iter_mut()
 }
 
+pub struct FunctionHelper<'a> {
+	#[cfg(threading)]
+	f: async_lock::Mutex<Box<dyn Fn(f64, f64) -> f64 + 'a + Sync + Send>>,
+
+	#[cfg(not(threading))]
+	f: Box<dyn Fn(f64, f64) -> f64 + 'a>,
+}
+
+impl<'a> FunctionHelper<'a> {
+	#[cfg(threading)]
+	pub fn new(f: impl Fn(f64, f64) -> f64 + 'a) -> FunctionHelper<'a> {
+		FunctionHelper {
+			f: async_lock::Mutex::new(Box::new(f)),
+		}
+	}
+
+	pub fn new(f: impl Fn(f64, f64) -> f64 + 'a) -> FunctionHelper<'a> {
+		FunctionHelper { f: Box::new(f) }
+	}
+
+	// pub fn get(&self, x: f64, x1: f64) -> f64 { (self.f.lock())(x, x1) }
+
+	#[cfg(threading)]
+	pub async fn get(&self, x: f64, x1: f64) -> f64 { (self.f.lock().await)(x, x1) }
+
+	#[cfg(not(threading))]
+	pub fn get(&self, x: f64, x1: f64) -> f64 { (self.f)(x, x1) }
+}
+
 pub trait VecValueToTuple {
 	fn to_tuple(&self) -> Vec<(f64, f64)>;
 }