title: Very slow input elements in Ant Design Form
body: <p>I am using React and Ant Design for React, and I'm trying to build a form with 10 to 15 input elements. The input is very slow. I'm using their examples in the documentation as a reference and I'm not doing anything different. What might cause my problem? Here is a code for reference:</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="true">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>const formItemLayout = {
        labelCol: {
          xs: { span: 24 },
          sm: { span: 8 }
        },
        wrapperCol: {
          xs: { span: 24 },
          sm: { span: 16 }
        }
      };
  
  &lt;Form inline="true" onSubmit={this.handleSubmit}&gt;
            &lt;Row gutter={8}&gt;
              &lt;Col span={15}&gt;
                &lt;FormItem {...formItemLayout} label="Name"&gt;
                  {getFieldDecorator(
                    `category[categories_langs][na5me]`)(
                      &lt;Input/&gt;
                  )}
                &lt;/FormItem&gt;
              &lt;/Col&gt;
            &lt;/Row&gt;
            
            // The above Row repeated ten-fifteen times
  
  &lt;/Form&gt;</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"&gt;&lt;/script&gt;
  &lt;script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"&gt;&lt;/script&gt;</code></pre>
  </div>
  </div>
  </p>