Delay rendering large data sets while using Cell

While using the `Cell` component of the library I noticed that there is large delay if I initialize it with a large amount of data. It takes about 3-5 seconds to render.

I am doing something like this in my component with 1000 dummy elements initialized:

``` javascript
var faker = require('faker');

var LOREM_IPSUM = 'Lorem ipsum dolor sit amet, ius ad pertinax oportere accommodare, an vix civibus corrumpit referrentur. Te nam case ludus inciderint, te mea facilisi adipiscing. Sea id integre luptatum. In tota sale consequuntur nec. Erat ocurreret mei ei. Eu paulo sapientem vulputate est, vel an accusam intellegam interesset. Nam eu stet pericula reprimique, ea vim illud modus, putant invidunt reprehendunt ne qui.';

componentWillMount: function() {
this.data = this.generateData();
},

generateData: function() {
var data = [];
for (var i = 0; i < 1000; i++) {
data.push({
image: faker.image.avatar(),
title: ("ROW: " + i + " - " + LOREM_IPSUM)
});
}
return data;
},

render: function() {
let items = this.data.map((data) => (
{data.title}
));
return (
console.log(event)}>

{items}


);
},

```

This issue is not reproducible if I change my implementation to be `Item`, rather than `Cell`, for large data sets. Before I start digging into the source I wanted to know if this is a known limitation with Cell (slowness with initializing large data sets).