diff --git a/src-tauri/src/core/tray/speed_rate.rs b/src-tauri/src/core/tray/speed_rate.rs
index 2d8f1a58..8bb9a4b7 100644
--- a/src-tauri/src/core/tray/speed_rate.rs
+++ b/src-tauri/src/core/tray/speed_rate.rs
@@ -118,7 +118,6 @@ impl SpeedRate {
         let icon_text_gap = 10;
         let max_text_width: f32 = 510.0;
         let text_area_start = width as i32 + icon_text_gap;
-        let text_area_width = max_text_width.ceil() as u32;
         
         // 用透明色清除文字区域
         for x in text_area_start..image.width() as i32 {
diff --git a/src/components/proxy/proxy-groups.tsx b/src/components/proxy/proxy-groups.tsx
index 8c4ac3ae..15741f96 100644
--- a/src/components/proxy/proxy-groups.tsx
+++ b/src/components/proxy/proxy-groups.tsx
@@ -1,4 +1,4 @@
-import { useRef, useState, useEffect, useCallback } from "react";
+import { useRef, useState, useEffect, useCallback, useMemo } from "react";
 import { useLockFn } from "ahooks";
 import { Virtuoso, type VirtuosoHandle } from "react-virtuoso";
 import {
@@ -16,6 +16,101 @@ import { ProxyRender } from "./proxy-render";
 import delayManager from "@/services/delay";
 import { useTranslation } from "react-i18next";
 import { ScrollTopButton } from "../layout/scroll-top-button";
+import { Box, styled } from "@mui/material";
+import { memo } from "react";
+
+// 将选择器组件抽离出来，避免主组件重渲染时重复创建样式
+const AlphabetSelector = styled(Box)(({ theme }) => ({
+  position: "fixed",
+  right: 4,
+  top: "50%",
+  transform: "translateY(-50%)",
+  display: "flex",
+  flexDirection: "column",
+  background: "transparent",
+  zIndex: 1000,
+  gap: "2px",
+  padding: "8px 4px",
+  willChange: "transform", // 优化动画性能
+  "& .letter": {
+    padding: "2px 4px",
+    fontSize: "12px",
+    cursor: "pointer",
+    fontFamily:
+      "-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif",
+    color: theme.palette.text.secondary,
+    position: "relative",
+    width: "1.5em",
+    height: "1.5em",
+    display: "flex",
+    alignItems: "center",
+    justifyContent: "center",
+    transition: "all 0.15s cubic-bezier(0.34, 1.56, 0.64, 1)", // 稍微加快动画速度
+    transform: "scale(1) translateZ(0)", // 开启GPU加速
+    backfaceVisibility: "hidden", // 防止闪烁
+    borderRadius: "6px",
+    "&:hover": {
+      color: theme.palette.primary.main,
+      transform: "scale(1.2) translateZ(0)",
+      backgroundColor: theme.palette.action.hover,
+      "& .tooltip": {
+        opacity: 1,
+        transform: "translateX(0) translateZ(0)",
+        visibility: "visible",
+      },
+    },
+    "&:hover ~ .letter": {
+      transform: "translateY(2px) translateZ(0)",
+    },
+  },
+  "& .tooltip": {
+    position: "absolute",
+    right: "calc(100% + 8px)",
+    background: theme.palette.background.paper,
+    padding: "4px 8px",
+    borderRadius: "6px",
+    boxShadow: theme.shadows[3],
+    whiteSpace: "nowrap",
+    opacity: 0,
+    visibility: "hidden",
+    transform: "translateX(4px) translateZ(0)",
+    transition: "all 0.15s cubic-bezier(0.34, 1.56, 0.64, 1)",
+    fontSize: "12px",
+    color: theme.palette.text.primary,
+    pointerEvents: "none",
+    backfaceVisibility: "hidden",
+    "&::after": {
+      content: '""',
+      position: "absolute",
+      right: "-4px",
+      top: "50%",
+      transform: "translateY(-50%)",
+      width: 0,
+      height: 0,
+      borderTop: "4px solid transparent",
+      borderBottom: "4px solid transparent",
+      borderLeft: `4px solid ${theme.palette.background.paper}`,
+    },
+  },
+}));
+
+// 抽离字母选择器子组件
+const LetterItem = memo(
+  ({
+    name,
+    onClick,
+    getFirstChar,
+  }: {
+    name: string;
+    onClick: (name: string) => void;
+    getFirstChar: (str: string) => string;
+  }) => (
+    <div className="letter" onClick={() => onClick(name)}>
+      <span>{getFirstChar(name)}</span>
+      <div className="tooltip">{name}</div>
+    </div>
+  ),
+);
 
 interface Props {
   mode: string;
@@ -34,7 +129,35 @@ export const ProxyGroups = (props: Props) => {
   const virtuosoRef = useRef<VirtuosoHandle>(null);
   const scrollPositionRef = useRef<Record<string, number>>({});
   const [showScrollTop, setShowScrollTop] = useState(false);
-  const scrollerRef = useRef<Element | null>(null);
+  const scrollerRef = useRef<HTMLElement | null>(null);
+
+  // 使用useMemo缓存字母索引数据
+  const { groupFirstLetters, letterIndexMap } = useMemo(() => {
+    const letters = new Set<string>();
+    const indexMap: Record<string, number> = {};
+
+    renderList.forEach((item, index) => {
+      if (item.type === 0) {
+        const fullName = item.group.name;
+        letters.add(fullName);
+        if (!(fullName in indexMap)) {
+          indexMap[fullName] = index;
+        }
+      }
+    });
+
+    return {
+      groupFirstLetters: Array.from(letters),
+      letterIndexMap: indexMap,
+    };
+  }, [renderList]);
+
+  // 缓存getFirstChar函数
+  const getFirstChar = useCallback((str: string) => {
+    const regex = /\p{Extended_Pictographic}|\p{L}|\p{N}|./u;
+    const match = str.match(regex);
+    return match ? match[0] : str.charAt(0);
+  }, []);
 
   // 从 localStorage 恢复滚动位置
   useEffect(() => {
@@ -77,13 +200,13 @@ export const ProxyGroups = (props: Props) => {
     [mode],
   );
 
-  // 优化滚动处理函数
+  // 优化滚动处理函数，使用防抖
   const handleScroll = useCallback(
-    (e: any) => {
+    debounce((e: any) => {
       const scrollTop = e.target.scrollTop;
       setShowScrollTop(scrollTop > 100);
       saveScrollPosition(scrollTop);
-    },
+    }, 16),
     [saveScrollPosition],
   );
 
@@ -109,6 +232,21 @@ export const ProxyGroups = (props: Props) => {
     saveScrollPosition(0);
   }, [saveScrollPosition]);
 
+  // 处理字母点击，使用useCallback
+  const handleLetterClick = useCallback(
+    (name: string) => {
+      const index = letterIndexMap[name];
+      if (index !== undefined) {
+        virtuosoRef.current?.scrollToIndex({
+          index,
+          align: "start",
+          behavior: "smooth",
+        });
+      }
+    },
+    [letterIndexMap],
+  );
+
   // 切换分组的节点代理
   const handleChangeProxy = useLockFn(
     async (group: IProxyGroupItem, proxy: IProxyItem) => {
@@ -226,6 +364,29 @@ export const ProxyGroups = (props: Props) => {
         )}
       />
       <ScrollTopButton show={showScrollTop} onClick={scrollToTop} />
+
+      <AlphabetSelector>
+        {groupFirstLetters.map((name) => (
+          <LetterItem
+            key={name}
+            name={name}
+            onClick={handleLetterClick}
+            getFirstChar={getFirstChar}
+          />
+        ))}
+      </AlphabetSelector>
     </div>
   );
 };
+
+// 简单的防抖函数
+function debounce<T extends (...args: any[]) => any>(
+  func: T,
+  wait: number,
+): (...args: Parameters<T>) => void {
+  let timeout: NodeJS.Timeout | null = null;
+  return (...args: Parameters<T>) => {
+    if (timeout) clearTimeout(timeout);
+    timeout = setTimeout(() => func(...args), wait);
+  };
+}
diff --git a/src/components/proxy/use-render-list.ts b/src/components/proxy/use-render-list.ts
index 3aafe574..8cd3f093 100644
--- a/src/components/proxy/use-render-list.ts
+++ b/src/components/proxy/use-render-list.ts
@@ -1,5 +1,5 @@
 import useSWR from "swr";
-import { useEffect, useMemo } from "react";
+import { useEffect, useMemo, useRef, useState, useCallback } from "react";
 import { getProxies } from "@/services/api";
 import { useVerge } from "@/hooks/use-verge";
 import { filterSort } from "./use-filter-sort";
@@ -21,34 +21,148 @@ export interface IRenderItem {
   headState?: HeadState;
 }
 
+interface ProxiesData {
+  groups: IProxyGroupItem[];
+  global?: IProxyGroupItem;
+  proxies: any[];
+}
+
+// 缓存计算结果
+const groupCache = new WeakMap<ProxiesData, Map<string, IProxyGroupItem>>();
+// 用于追踪缓存的key
+const cacheKeys = new Set<ProxiesData>();
+
 export const useRenderList = (mode: string) => {
+  // 添加用户交互标记
+  const isUserInteracting = useRef(false);
+  const interactionTimer = useRef<number | null>(null);
+  // 添加上一次有效的数据缓存
+  const [lastValidData, setLastValidData] = useState<ProxiesData | null>(null);
+  // 添加刷新锁
+  const refreshLock = useRef(false);
+  const lastRenderList = useRef<IRenderItem[]>([]);
+
+  // 组件卸载时清理
+  useEffect(() => {
+    return () => {
+      if (interactionTimer.current) {
+        clearTimeout(interactionTimer.current);
+      }
+      refreshLock.current = false;
+      isUserInteracting.current = false;
+      // 清理 WeakMap 缓存
+      cacheKeys.forEach((key) => {
+        groupCache.delete(key);
+      });
+      cacheKeys.clear();
+    };
+  }, []);
+
+  // 优化数据获取函数
+  const fetchProxies = useCallback(async () => {
+    try {
+      if (isUserInteracting.current || refreshLock.current) {
+        return lastValidData;
+      }
+      const data = await getProxies();
+
+      // 预处理和缓存组数据
+      if (data && !groupCache.has(data)) {
+        const groupMap = new Map();
+        data.groups.forEach((group) => {
+          groupMap.set(group.name, group);
+        });
+        groupCache.set(data, groupMap);
+        cacheKeys.add(data);
+      }
+
+      setLastValidData(data);
+      return data;
+    } catch (error) {
+      if (lastValidData) return lastValidData;
+      throw error;
+    }
+  }, [lastValidData]);
+
   const { data: proxiesData, mutate: mutateProxies } = useSWR(
     "getProxies",
-    getProxies,
+    fetchProxies,
     {
-      refreshInterval: 2000,
+      refreshInterval: isUserInteracting.current ? 0 : 2000,
       dedupingInterval: 1000,
       revalidateOnFocus: false,
+      keepPreviousData: true,
+      onSuccess: (data) => {
+        if (!data || isUserInteracting.current) return;
+
+        if (proxiesData) {
+          try {
+            const groupMap = groupCache.get(proxiesData);
+            if (!groupMap) return;
+
+            const needUpdate = data.groups.some((group: IProxyGroupItem) => {
+              const oldGroup = groupMap.get(group.name);
+              return !oldGroup || oldGroup.now !== group.now;
+            });
+
+            if (!needUpdate) return;
+          } catch (e) {
+            console.error("Data comparison error:", e);
+            return;
+          }
+        }
+      },
     },
   );
 
+  // 优化mutateProxies包装函数
+  const wrappedMutateProxies = useCallback(async () => {
+    refreshLock.current = true;
+    isUserInteracting.current = true;
+
+    if (interactionTimer.current) {
+      clearTimeout(interactionTimer.current);
+    }
+
+    try {
+      if (!lastValidData && proxiesData) {
+        setLastValidData(proxiesData);
+      }
+      return await mutateProxies();
+    } finally {
+      interactionTimer.current = window.setTimeout(() => {
+        isUserInteracting.current = false;
+        refreshLock.current = false;
+        interactionTimer.current = null;
+      }, 2000);
+    }
+  }, [proxiesData, lastValidData, mutateProxies]);
+
+  // 确保初始数据加载后更新lastValidData
+  useEffect(() => {
+    if (proxiesData && !lastValidData) {
+      setLastValidData(proxiesData);
+    }
+  }, [proxiesData]);
+
   const { verge } = useVerge();
   const { width } = useWindowWidth();
 
-  let col = Math.floor(verge?.proxy_layout_column || 6);
-
-  // 自适应
-  if (col >= 6 || col <= 0) {
-    if (width > 1450) col = 4;
-    else if (width > 1024) col = 3;
-    else if (width > 900) col = 2;
-    else if (width >= 600) col = 2;
-    else col = 1;
-  }
+  const col = useMemo(() => {
+    const baseCol = Math.floor(verge?.proxy_layout_column || 6);
+    if (baseCol >= 6 || baseCol <= 0) {
+      if (width > 1450) return 4;
+      if (width > 1024) return 3;
+      if (width > 900) return 2;
+      if (width >= 600) return 2;
+      return 1;
+    }
+    return baseCol;
+  }, [verge?.proxy_layout_column, width]);
 
   const [headStates, setHeadState] = useHeadStateNew();
 
-  // make sure that fetch the proxies successfully
+  // 优化初始数据加载
   useEffect(() => {
     if (!proxiesData) return;
     const { groups, proxies } = proxiesData;
@@ -57,21 +171,23 @@ export const useRenderList = (mode: string) => {
       (mode === "rule" && !groups.length) ||
       (mode === "global" && proxies.length < 2)
     ) {
-      setTimeout(() => mutateProxies(), 500);
+      const timer = setTimeout(() => mutateProxies(), 500);
+      return () => clearTimeout(timer);
     }
-  }, [proxiesData, mode]);
+  }, [proxiesData, mode, mutateProxies]);
 
-  const renderList: IRenderItem[] = useMemo(() => {
-    if (!proxiesData) return [];
+  // 优化渲染列表计算
+  const renderList = useMemo(() => {
+    const currentData = proxiesData || lastValidData;
+    if (!currentData) return lastRenderList.current;
 
-    // global 和 direct 使用展开的样式
     const useRule = mode === "rule" || mode === "script";
     const renderGroups =
-      (useRule && proxiesData.groups.length
-        ? proxiesData.groups
-        : [proxiesData.global!]) || [];
+      (useRule && currentData.groups.length
+        ? currentData.groups
+        : [currentData.global!]) || [];
 
-    const retList = renderGroups.flatMap((group) => {
+    const newList = renderGroups.flatMap((group: IProxyGroupItem) => {
       const headState = headStates[group.name] || DEFAULT_STATE;
       const ret: IRenderItem[] = [
         { type: 0, key: group.name, group, headState },
@@ -89,9 +205,9 @@ export const useRenderList = (mode: string) => {
 
         if (!proxies.length) {
           ret.push({ type: 3, key: `empty-${group.name}`, group, headState });
+          return ret;
         }
 
-        // 支持多列布局
         if (col > 1) {
           return ret.concat(
             groupList(proxies, col).map((proxyCol) => ({
@@ -118,13 +234,17 @@ export const useRenderList = (mode: string) => {
       return ret;
     });
 
-    if (!useRule) return retList.slice(1);
-    return retList.filter((item) => item.group.hidden === false);
-  }, [headStates, proxiesData, mode, col]);
+    const filteredList = !useRule
+      ? newList.slice(1)
+      : newList.filter((item) => !item.group.hidden);
+
+    lastRenderList.current = filteredList;
+    return filteredList;
+  }, [headStates, proxiesData, lastValidData, mode, col]);
 
   return {
     renderList,
-    onProxies: mutateProxies,
+    onProxies: wrappedMutateProxies,
     onHeadState: setHeadState,
   };
 };