diff --git a/src/ui/components/monitor_list.rs b/src/ui/components/monitor_list.rs
index 96baf77..24f6081 100644
--- a/src/ui/components/monitor_list.rs
+++ b/src/ui/components/monitor_list.rs
@@ -6,11 +6,14 @@ use std::{
     sync::{OnceLock, RwLock},
 };
 
-use crate::i18n::t;
-use crate::ui::dashboard::{
-    MonitorStatus, MonitorViewState,
-    model::{BORDER_LINES_VIEW, DashboardViewState, GroupViewState},
+use crate::{
+    i18n::t,
+    ui::dashboard::{
+        MonitorStatus, MonitorViewState,
+        model::{BORDER_LINES_VIEW, DashboardViewState, GroupViewState},
+    },
 };
+use once_cell::sync::Lazy;
 use ratatui::{
     Frame,
     layout::{Alignment, Constraint, Direction, Layout, Rect},
@@ -21,8 +24,17 @@ use ratatui::{
 
 const STATUS_LINE_LENGTH: usize = 100;
 const MAX_NAME_LENGTH: usize = 30;
-static STATUS_SPANS: OnceLock<HashMap<MonitorStatus, Span<'static>>> = OnceLock::new();
-static STATUS_LINE_CACHE: OnceLock<RwLock<HashMap<u64, Vec<Span<'static>>>>> = OnceLock::new();
+
+static UP_SPAN: Lazy<Span<'static>> =
+    Lazy::new(|| Span::styled("■", Style::default().fg(Color::Green)));
+
+static DOWN_SPAN: Lazy<Span<'static>> =
+    Lazy::new(|| Span::styled("■", Style::default().fg(Color::Red)));
+
+static UNKNOWN_SPAN: Lazy<Span<'static>> =
+    Lazy::new(|| Span::styled("■", Style::default().fg(Color::Yellow)));
+
+static STATUS_LINE_CACHE: OnceLock<RwLock<HashMap<u64, Vec<&'static Span<'static>>>>> = OnceLock::new();
 
 pub fn render_monitor_list(main_frame: &mut Frame, area: Rect, state: &mut DashboardViewState) {
     let available_height = area.height as usize;
@@ -209,24 +221,12 @@ fn get_formated_line(text: String, color: Color, modifier: Modifier) -> Line<'st
     )])
 }
 
-fn get_cached_status_span(status: &MonitorStatus) -> Span<'static> {
-    let cache = STATUS_SPANS.get_or_init(|| {
-        let mut m = HashMap::new();
-        m.insert(
-            MonitorStatus::Up,
-            Span::styled("■", Style::default().fg(Color::Green)),
-        );
-        m.insert(
-            MonitorStatus::Down,
-            Span::styled("■", Style::default().fg(Color::Red)),
-        );
-        m.insert(
-            MonitorStatus::Unknown,
-            Span::styled("■", Style::default().fg(Color::Yellow)),
-        );
-        m
-    });
-    cache.get(status).cloned().unwrap_or_default()
+fn get_status_span(status: &MonitorStatus) -> &'static Span<'static> {
+    match status {
+        MonitorStatus::Up => &UP_SPAN,
+        MonitorStatus::Down => &DOWN_SPAN,
+        MonitorStatus::Unknown => &UNKNOWN_SPAN,
+    }
 }
 
 fn title_style() -> Style {
@@ -252,27 +252,25 @@ fn get_cached_status_line(status_history: &[MonitorStatus]) -> Line<'static> {
     {
         let read = cache.read().unwrap();
         if let Some(spans) = read.get(&hash) {
-            return Line::from(spans.clone());
+            return Line::from(spans.iter().map(|&span| span.clone()).collect::<Vec<_>>());
         }
     }
 
-    let spans: Vec<Span<'static>> = status_history
+    let spans: Vec<&'static Span<'static>> = status_history
         .iter()
         .rev()
         .take(STATUS_LINE_LENGTH)
-        .map(|status| get_cached_status_span(status))
+        .map(|status| get_status_span(status))
         .collect();
 
     let mut write = cache.write().unwrap();
     if write.len() > 1000 {
-
         let keys_to_remove: Vec<_> = write.keys().take(250).copied().collect();
 
         for key in keys_to_remove {
             write.remove(&key);
         }
-
     }
     write.insert(hash, spans.clone());
-    Line::from(spans)
+    Line::from(spans.iter().map(|&span| span.clone()).collect::<Vec<_>>())
 }