ant-design/components/transfer/demo/large-data.md

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---
order: 4
debug: true
title:
zh-CN: 大数据性能测试
en-US: Performance Test
---
## zh-CN
2000 条数据。
## en-US
2000 items.
````jsx
import { Transfer } from 'antd';
const App = React.createClass({
getInitialState() {
return {
mockData: [],
targetKeys: [],
};
},
componentDidMount() {
this.getMock();
},
getMock() {
const targetKeys = [];
const mockData = [];
for (let i = 0; i < 2000; i++) {
const data = {
key: i.toString(),
title: `content${i + 1}`,
description: `description of content${i + 1}`,
chosen: Math.random() * 2 > 1,
};
if (data.chosen) {
targetKeys.push(data.key);
}
mockData.push(data);
}
this.setState({ mockData, targetKeys });
},
handleChange(targetKeys, direction, moveKeys) {
console.log(targetKeys, direction, moveKeys);
this.setState({ targetKeys });
},
render() {
return (
<Transfer
dataSource={this.state.mockData}
targetKeys={this.state.targetKeys}
onChange={this.handleChange}
render={item => item.title}
/>
);
},
});
ReactDOM.render(<App />, mountNode);
````