diff --git a/src/stores/dataViewerStore.ts b/src/stores/dataViewerStore.ts
index 9e90da1..be502ee 100644
--- a/src/stores/dataViewerStore.ts
+++ b/src/stores/dataViewerStore.ts
@@ -137,7 +137,7 @@ function u8toHexdump(buffer: Uint8Array) {
 function strToHTML(str: string) {
     return str.replace(/\n/g, '<br>') // Replace newline with <br> tag
         .replace(/\t/g, '&emsp;') // Replace tab with spaces (or you could use '&nbsp;' for single spaces)
-        .replace(/ /g, '&nbsp;');
+        .replace(/ /g, ' ');
 }
 
 function isArrayContained(subArray: Uint8Array, mainArray: Uint8Array,
@@ -376,11 +376,15 @@ export const useDataViewerStore = defineStore('text-viewer', () => {
         } else {
             RxSegment = new Uint8Array();
         }
-        RxRemainHexdump.value = u8toHexdump(RxSegment);
 
         for (let i = 0; i < frames.length; i++) {
             addItem(frames[i], isRX, doSend);
         }
+
+        if (RxSegment.length > 8192) {
+            addItem(RxSegment, isRX, doSend);
+            RxSegment = new Uint8Array();
+        }
     }
 
     const frameBreakRet = {
@@ -409,6 +413,11 @@ export const useDataViewerStore = defineStore('text-viewer', () => {
     const TxTotalByteCount = ref(0);
     const TxByteCount = ref(0);
 
+    let TxByteCountLocal = 0;
+    let TxTotalByteCountLocal = 0;
+    let RxByteCountLocal = 0;
+    let RxTotalByteCountLocal = 0;
+
     const enableFilter = ref(true);
     const forceToBottom = ref(true);
     const filterChanged = ref(false);
@@ -511,9 +520,19 @@ export const useDataViewerStore = defineStore('text-viewer', () => {
         }
     }, {immediate: true});
 
+    /* delayed value update, prevent quick unnecessary update */
     setInterval(() => {
         dataBufLength.value = dataBuf.length;
-    }, 500);
+        TxByteCount.value = TxByteCountLocal;
+        TxTotalByteCount.value = TxTotalByteCountLocal;
+        RxByteCount.value = RxByteCountLocal;
+        RxTotalByteCount.value = RxTotalByteCountLocal;
+        if (RxSegment.length) {
+            RxRemainHexdump.value = u8toHexdump(RxSegment);
+        } else {
+            RxRemainHexdump.value = "";
+        }
+    }, 200);
 
     function addString(item: string, isRX: boolean = false, doSend: boolean = false, type: number = 0) {
         const encoder = new TextEncoder();
@@ -594,8 +613,8 @@ export const useDataViewerStore = defineStore('text-viewer', () => {
         // });
 
         if (isRX) {
-            RxTotalByteCount.value += item.length;
-            RxByteCount.value = item.length;
+            RxTotalByteCountLocal += item.length;
+            RxByteCountLocal = item.length;
         } else {
             /* append prefix and suffix */
             if (computedPrefixValue.value.length || computedSuffixValue.value.length) {
@@ -614,8 +633,8 @@ export const useDataViewerStore = defineStore('text-viewer', () => {
             } else {
                 type = 1;
             }
-            TxTotalByteCount.value += item.length;
-            TxByteCount.value = item.length;
+            TxTotalByteCountLocal += item.length;
+            TxByteCountLocal = item.length;
         }
 
         let str = ""
@@ -722,9 +741,9 @@ export const useDataViewerStore = defineStore('text-viewer', () => {
 
     function clearByteCount(isRX: boolean) {
         if (isRX) {
-            RxTotalByteCount.value = 0;
+            RxTotalByteCountLocal = 0;
         } else {
-            TxTotalByteCount.value = 0;
+            TxTotalByteCountLocal = 0;
         }
     }
 
@@ -734,11 +753,13 @@ export const useDataViewerStore = defineStore('text-viewer', () => {
         dataBufLength.value = 0;
         batchStartIndex = 0;
 
-        RxByteCount.value = 0;
-        RxTotalByteCount.value = 0;
+        RxByteCountLocal = 0;
+        RxTotalByteCountLocal = 0;
+        TxByteCountLocal = 0;
+        TxTotalByteCountLocal = 0;
 
-        TxByteCount.value = 0;
-        TxTotalByteCount.value = 0;
+        RxSegment = new Uint8Array();
+        RxRemainHexdump.value = "";
     }
 
     function clearFilteredBuff() {
diff --git a/src/views/text-data-viewer/textDataViewer.vue b/src/views/text-data-viewer/textDataViewer.vue
index d9f549c..ce20cc9 100644
--- a/src/views/text-data-viewer/textDataViewer.vue
+++ b/src/views/text-data-viewer/textDataViewer.vue
@@ -103,8 +103,8 @@
         :class="[store.enableLineWrap ? 'break-all' : 'text-nowrap']"
     >
       <template v-slot:default="{ item, }">
-        <div>
-          <div class="flex">
+        <div class="">
+          <div class="flex" :class="[store.enableLineWrap ? 'whitespace-pre-wrap' : 'whitespace-pre']">
             <p class="text-nowrap text-sm text-lime-500" v-if="item.isRX" type="success" v-show="store.showTimestamp">
               <span>{{ item.time }}</span>◄-RX|</p>
             <p class="text-nowrap text-sm text-sky-500" v-else-if="item.type === 0" type="primary" v-show="store.showTimestamp">
@@ -115,10 +115,10 @@
             <p v-show="store.showText"
                v-html="item.str"></p>
           </div>
-          <div class="flex text-wrap">
+          <div class="flex">
             <p v-show="store.showHex" class="">{{ item.hex }}</p>
           </div>
-          <div class="flex">
+          <div class="flex whitespace-pre">
             <p v-show="store.showHexdump"
                class="text-nowrap"
                :style="{ 'background-color': item.isRX ? store.RxHexdumpColor : store.TxHexdumpColor }"
@@ -138,7 +138,7 @@
     >
       <template v-slot:default="{ item, }">
         <div>
-          <div class="flex">
+          <div class="flex" :class="[store.enableLineWrap ? 'whitespace-pre-wrap' : 'whitespace-pre']">
             <p class="text-nowrap text-sm text-lime-500" v-if="item.isRX" type="success" v-show="store.showTimestamp">
               <span>{{ item.time }}</span>◄-RX|</p>
             <p class="text-nowrap text-sm text-sky-500" v-else-if="item.type === 0" type="primary" v-show="store.showTimestamp">
@@ -148,10 +148,10 @@
             <p v-show="store.showText"
                v-html="item.str"></p>
           </div>
-          <div class="flex text-wrap">
+          <div class="flex">
             <p v-show="store.showHex" class="">{{ item.hex }}</p>
           </div>
-          <div class="flex">
+          <div class="flex whitespace-pre">
             <p v-show="store.showHexdump"
                class="text-nowrap"
                :style="{ 'background-color': item.isRX ? store.RxHexdumpColor : store.TxHexdumpColor }"
@@ -165,7 +165,7 @@
 
   <div class="shrink-0 flex max-h-14 mt-0.5 text-xs">
     <div class="flex shrink-0">
-      <el-tooltip content="未满足断帧规则的数据（如：未超时），暂时实时显示在此区域。" effect="light">
+      <el-tooltip content="未满足断帧规则的数据（如：未超时），暂时实时显示在此区域。超过8192字节，自动断帧；" effect="light">
         <InlineSvg name="help" class="w-3.5 h-3.5 text-gray-500 cursor-help"></InlineSvg>
       </el-tooltip>
       <p>►</p>
@@ -209,12 +209,12 @@
     <div class="flex gap-2">
       <el-link>
         <el-tag class="font-mono font-bold" size="small">
-          {{ `TX:${store.TxByteCount}B/${store.TxTotalByteCount}B` }}
+          {{ `TX(B):${store.TxByteCount}/ ${store.TxTotalByteCount}` }}
         </el-tag>
       </el-link>
       <el-link type="success">
         <el-tag class="font-mono font-bold" size="small" type="success">
-          {{ `RX:${store.RxByteCount}B/${store.RxTotalByteCount}B` }}
+          {{ `RX(B):${store.RxByteCount}/ ${store.RxTotalByteCount}` }}
         </el-tag>
       </el-link>
       <div class="flex align-center">
@@ -222,7 +222,7 @@
           <el-link class="flex" @click="store.clearDataBuff" type="warning">
             <InlineSvg class="h-5" name="trash"></InlineSvg>
           </el-link>
-          <span class="align-text-bottom">缓存帧数: {{ store.dataBufLength }}/20000</span>
+          <span class="align-text-bottom">缓存帧数: {{ store.dataBufLength }}/30000</span>
         </el-tag>
       </div>
     </div>
@@ -336,8 +336,7 @@ function addItem(nr: number) {
 function scrollToBottom() {
   nextTick(() => {
     const scrollerElement = vuetifyVirtualScrollBarRef.value; // Adjust according to your setup
-    // scrollerElement.scrollTop = scrollerElement.scrollHeight;
-    scrollerElement.scrollTo(scrollerElement.scrollLeft, scrollerElement.scrollHeight);
+    scrollerElement.scrollTop = scrollerElement.scrollHeight;
   });
 }
 
@@ -428,6 +427,12 @@ watch(() => store.filterChanged, (value) => {
   }
 })
 
+watch(() => store.showVirtualScroll, () => {
+  if (store.forceToBottom) {
+    scrollToBottom();
+  }
+});
+
 const handleScroll = (ev: Event) => {
   if (store.forceToBottom) {
     if (vuetifyVirtualScrollBarRef.value.scrollTop - lastScrollHeight < 0) {