---
category: 2
debug: true
title: 大数据性能测试
title_en: Performance Test
---

 zh-CN

2000 条数据。

 en-US

2000 items.

````jsx
import { Transfer } from 'parkball';

class App extends React.Component {
  state = {
    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);
````