diff --git a/Cargo.lock b/Cargo.lock
index 75ab64a..24a8738 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -375,6 +375,15 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "lru"
+version = "0.7.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e999beba7b6e8345721bd280141ed958096a2e4abdf74f67ff4ce49b4b54e47a"
+dependencies = [
+ "hashbrown",
+]
+
 [[package]]
 name = "malloc_buf"
 version = "0.0.6"
@@ -399,6 +408,29 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "memoize"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3b2ae6b7c9fbefd9bad492a5c65013e9fd10d6db3f971ee1e2d1c55485dd5135"
+dependencies = [
+ "lazy_static",
+ "lru",
+ "memoize-inner",
+]
+
+[[package]]
+name = "memoize-inner"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8bfde264c318ec8c2de5c39e0ba3910fac8d1065e3b947b183ebd884b799719b"
+dependencies = [
+ "lazy_static",
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+]
+
 [[package]]
 name = "miette"
 version = "5.7.0"
@@ -843,6 +875,7 @@ version = "0.1.1"
 dependencies = [
  "cli-clipboard",
  "knuffel",
+ "memoize",
  "miette",
  "url",
  "wildmatch",
diff --git a/Cargo.toml b/Cargo.toml
index 7b1a3a0..bb40e4a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,6 +11,7 @@ license = "NVPLv7+"
 [dependencies]
 cli-clipboard = "0.4.0"
 knuffel = "3.0.0"
+memoize = { version = "0.4.0", features = ["full"] }
 miette = { version = "5.7.0", features = ["fancy"] }
 url = "2.3.1"
 wildmatch = "2.1.1"
diff --git a/src/main.rs b/src/main.rs
index 28976df..0283438 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,4 +1,5 @@
 use cli_clipboard::{ClipboardContext, ClipboardProvider};
+use memoize::memoize;
 use miette::{miette, IntoDiagnostic, Result};
 use std::{env, fs};
 use url::Url;
@@ -46,7 +47,7 @@ fn main() -> Result<()> {
                 // Clipboard changed
                 if contents != last_contents {
                     last_contents = contents.clone();
-                    if let Ok(url) = clean_url(contents, &patterns) {
+                    if let Ok(url) = clean_url(contents, patterns.clone()) {
                         // Update clipboard
                         clipboard.set_contents(url.clone()).map_err(|e| {
                             miette!(format!("Couldn't set clipboard contents: {e}"))
@@ -61,14 +62,15 @@ fn main() -> Result<()> {
     }
 }
 
-fn clean_url(text: String, patterns: &Vec<String>) -> Result<String> {
+#[memoize(Capacity: 1024)]
+fn clean_url(text: String, patterns: Vec<String>) -> Result<String, String> {
     if let Ok(mut url) = Url::parse(&text) {
         let url_inner = url.clone();
 
         // Skip URLs without a host
-        let Some(host) = url_inner.host_str() else { return Err(miette!("URL {} does not have a host", url_inner)) };
+        let Some(host) = url_inner.host_str() else { return Err(format!("URL {} does not have a host", url_inner)) };
 
-        for pattern in patterns {
+        for pattern in &patterns {
             let url_inner = url.clone();
             match pattern.split_once('@') {
                 Some((param, domain)) => {
@@ -97,6 +99,6 @@ fn clean_url(text: String, patterns: &Vec<String>) -> Result<String> {
 
         Ok(url)
     } else {
-        Err(miette!("Contents are not a valid URL"))
+        Err(format!("Contents are not a valid URL"))
     }
 }