diff --git a/src/editor/config.js b/src/editor/config.js
index 055b81df..c6eac01a 100644
--- a/src/editor/config.js
+++ b/src/editor/config.js
@@ -47,16 +47,4 @@ export const CLASS_OR_ID = genUpper2LowerKeyHash([
   'AG_EMOJI_MARKED_TEXT'
 ])
 
-export const paragraphClassName = 'aganippe-paragraph'
-export const activeClassName = 'aganippe-active'
-export const EDITOR_ATTR_NAME = 'aganippe-editor-element'
-export const EDITOR_ID = 'write'
-export const FLOAT_BOX_ID = 'ag-float-emoji-box'
-export const FLOAT_BOX_CLASSNAME = 'ag-float-emoji-box'
-export const SHOW_EMOJI_BOX = 'ag-float-emoji-box-show'
-export const EMOJI_ITEM = 'ag-emoji-item'
-export const EMOJI_ITEM_ACTIVE = 'ag-emoji-active'
-export const EMOJI_ICON = 'ag-emoji-item-icon'
-export const EMOJI_MARKED_TEXT = 'ag-emoji-marked-text'
-
 // export const markedSymbol = ['*', '-', '_', '!', '[', ']']
diff --git a/src/editor/index.js b/src/editor/index.js
index c01b5b7f..2b54af0e 100644
--- a/src/editor/index.js
+++ b/src/editor/index.js
@@ -46,7 +46,7 @@ class Aganippe {
     eventCenter.subscribe('markedTextChange', this.subscribeMarkedText.bind(this))
     this.dispatchMarkedText()
 
-    eventCenter.subscribe('editEmoji', throttle(this.subscribeEditEmoji.bind(this)))
+    eventCenter.subscribe('editEmoji', throttle(this.subscribeEditEmoji.bind(this), 200))
     this.dispatchEditeEmoji()
 
     eventCenter.subscribe('enter', this.subscribeEnter.bind(this))
diff --git a/src/editor/records.js b/src/editor/records.js
new file mode 100644
index 00000000..e69de29b
diff --git a/src/editor/utils/index.js b/src/editor/utils/index.js
index 2bd9aa02..73c0df0e 100644
--- a/src/editor/utils/index.js
+++ b/src/editor/utils/index.js
@@ -19,13 +19,42 @@ export const getUniqueId = set => {
   return id
 }
 
-export const throttle = fn => {
-  let timer = null
-  return (...args) => {
-    if (timer) clearTimeout(timer)
-    timer = setTimeout(() => {
-      fn(...args)
-    }, 300)
+// https://github.com/jashkenas/underscore
+export const throttle = (func, wait = 50) => {
+  let context
+  let args
+  let result
+  let timeout = null
+  let previous = 0
+  const later = () => {
+    previous = Date.now()
+    timeout = null
+    result = func.apply(context, args)
+    if (!timeout) {
+      context = args = null
+    }
+  }
+
+  return function () {
+    const now = Date.now()
+    const remaining = wait - (now - previous)
+
+    context = this
+    args = arguments
+    if (remaining <= 0 || remaining > wait) {
+      if (timeout) {
+        clearTimeout(timeout)
+        timeout = null
+      }
+      previous = now
+      result = func.apply(context, args)
+      if (!timeout) {
+        context = args = null
+      }
+    } else if (!timeout) {
+      timeout = setTimeout(later, remaining)
+    }
+    return result
   }
 }
 /**