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Remove ", which will be super fast" from FAQ.md

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Summary:
Issue fixed: #763

- [x] All tests pass. Demo project builds and runs.
- [x] I added tests, an experiment, or detailed why my change isn't tested.
- [x] I added an entry to the `CHANGELOG.md` for any breaking changes, enhancements, or bug fixes.
- [ ] I have reviewed the [contributing guide](https://github.com/Instagram/IGListKit/blob/master/.github/CONTRIBUTING.md)
Closes https://github.com/Instagram/IGListKit/pull/794

Differential Revision: D5129406

Pulled By: rnystrom

fbshipit-source-id: dcca533130e99d5960781c5c3336a6fdbd399505
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Daniel Alamo 2017-05-25 08:05:26 -07:00 committed by Facebook Github Bot
parent fb5dd116a2
commit 49f1d3e653
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Guides/Best Practices and FAQ.md
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@ -72,7 +72,7 @@ See discussion at [#184](https://github.com/Instagram/IGListKit/issues/184).
#### I have a *huge* data set and [`-performUpdatesAnimated: completion:`](https://instagram.github.io/IGListKit/Classes/IGListAdapter.html#/c:objc(cs)IGListAdapter(im)performUpdatesAnimated:completion:) is *super* slow. What do I do?
If you have multiple thousands of items and you cannot batch them in, you'll see performance issues with `-performUpdatesAnimated: completion:`. The real bottle neck behind the scenes here is `UICollectionView` attempting to insert so many cells at once. Instead, call [`-reloadDataWithCompletion:`](https://instagram.github.io/IGListKit/Classes/IGListAdapter.html#/c:objc(cs)IGListAdapter(im)reloadDataWithCompletion:) when you first load data, which will be super fast. Behind the scenes, this method *does not* do any diffing and simply calls `-reloadData` on `UICollectionView`. For subsequent updates, you can then use `-performUpdatesAnimated: completion:`.
If you have multiple thousands of items and you cannot batch them in, you'll see performance issues with `-performUpdatesAnimated: completion:`. The real bottle neck behind the scenes here is `UICollectionView` attempting to insert so many cells at once. Instead, call [`-reloadDataWithCompletion:`](https://instagram.github.io/IGListKit/Classes/IGListAdapter.html#/c:objc(cs)IGListAdapter(im)reloadDataWithCompletion:) when you first load data. Behind the scenes, this method *does not* do any diffing and simply calls `-reloadData` on `UICollectionView`. For subsequent updates, you can then use `-performUpdatesAnimated: completion:`.
#### How do I use IGListKit and estimated cell sizes with Auto Layout?