Sunday, April 10, 2016

Why is React Native 0.22.2 Movies example click handling so slow?

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I'm running the official React Native 0.22.2 "Movies" example on a physical iPad Mini 2.1 running iOS version 9.3.1, not on the simulator.

I selected the Release scheme and added main.jsbundle to run without a server.

When I scroll down the list of movies and it stops, I click on the movie row. However it takes a second or two to finally respond and open the details page.

Is there some flag or setting I'm missing to get fast performance?

If not, this is a big disappointment. Everything I read suggested it would be as responsive as a native app.

Also just ran on iPad mini running 9.2. It has the same lag when trying to click on a movie row.

Here's a video demonstrating the issue:

https://www.youtube.com/watch?v=2D6gMMVbF6k

I want to know if it's a mistake to start a project with React Native. If the performance is this bad, I'll just stick with Swift.

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