title: React-Native Blur Radius Animation with ScrollView is Choppy
body: <p>I have a ScrollView using Animated Event to do some basic animations. Everything works great but now I am wanting to animate blurRadius on images but the blur doesn't kick in until a few seconds after scrolling began. I've tried just about every animation solution possible...</p>
  
  <p>This is the ScrollView... (AnimatedEvent.scrollYOffset is just a shortcut function I made) (Normally I have the throttle at 16 but found 7 was a little better but not even close to good)</p>
  
  <pre><code>        &lt;ScrollView
          onScroll={AnimatedEvent.scrollYOffset(animY)}
          scrollEventThrottle={7}
          style={[QuickStyle.fillScreen,{
              backgroundColor: 'rgb(16, 50, 74)',
              flex: 1,
          }]}&gt;
  </code></pre>
  
  <p>This is one of the images with the blur property...</p>
  
  <pre><code>    const blurry = this.state.animY.interpolate({
          inputRange: [0,150],
          outputRange: [0,7],
          extrapolate: 'clamp'
      });
  
      const slide1 = &lt;View style={[{
          borderRadius: borderRadius,
          overflow: 'hidden',
          width: width,
          height: height,
          backgroundColor: 'rgb(28, 181, 251)' //light blue
      }]}&gt;
          &lt;Animated.Image blurRadius={blurry} ref={img =&gt; this.blur1 = img} style={{
              width: width,
              height: height,
          }} source={require('../../assets/images/big-numbers.jpg')} /&gt;
      &lt;/View&gt;;
  </code></pre>
  
  <p>What I've tried... (all with the same laggy choppy result) 1) Animating directly into the blurRadius prop 2) Using a ref with setNativeProps({blurRadius:x}) 3) Using setState({blurRadius:x}) - this was at least smooth but slowed down every animation a lot.</p>
  
  <p>What I am trying next... Running these 3 solutions in release mode. I also will consider doing this directly in Objective-C, but really want to avoid that...</p>
  
  <p>Would the react-native-blur package help? I'm guessing not...</p>
  
  <p>Please help! Thank you!</p>