chore(Icon): improve perf

src/icon/index.less

@@ -5,5 +5,6 @@
   &__image {
     width: 1em;
     height: 1em;
+    object-fit: contain;
   }
 }

src/icon/index.tsx

@@ -1,7 +1,6 @@
 import { createNamespace, addUnit } from '../utils';
 import { inherit } from '../utils/functional';
 import Info from '../info';
-import Image from '../image';
 
 // Types
 import { CreateElement, RenderContext } from 'vue/types';
@@ -43,7 +42,10 @@ function Icon(
 
   return (
     <props.tag
-      class={[props.classPrefix, imageIcon ? '' : `${props.classPrefix}-${name}`]}
+      class={[
+        props.classPrefix,
+        imageIcon ? '' : `${props.classPrefix}-${name}`
+      ]}
       style={{
         color: props.color,
         fontSize: addUnit(props.size)
@@ -51,9 +53,7 @@ function Icon(
       {...inherit(ctx, true)}
     >
       {slots.default && slots.default()}
-      {imageIcon && (
-        <Image class={bem('image')} fit="contain" src={name} showLoading={false} />
-      )}
+      {imageIcon && <img class={bem('image')} src={name} />}
       <Info dot={props.dot} info={props.info} />
     </props.tag>
   );

src/icon/test/__snapshots__/index.spec.js.snap

@@ -17,17 +17,13 @@ exports[`render icon with builtin icon name 1`] = `
 `;
 
 exports[`render icon with local image 1`] = `
-<i class="van-icon">
-  <div class="van-image van-icon__image"><img src="/assets/icon.jpg" class="van-image__img" style="object-fit: contain;"></div>
-  <!---->
-</i>
+<i class="van-icon"><img src="/assets/icon.jpg" class="van-icon__image">
+  <!----></i>
 `;
 
 exports[`render icon with url name 1`] = `
-<i class="van-icon">
-  <div class="van-image van-icon__image"><img src="https://img.yzcdn.com/icon.jpg" class="van-image__img" style="object-fit: contain;"></div>
-  <!---->
-</i>
+<i class="van-icon"><img src="https://img.yzcdn.com/icon.jpg" class="van-icon__image">
+  <!----></i>
 `;
 
 exports[`size without unit 1`] = `