title: Memory usage is getting higher and higer while I am scrolling Flatlist and memory is not released when I stop scrolling (React Native)
body: <p>I am using Flatlist and SectionList in my react native project and I have 300+ rows of data. However, I found a serious problem which is when I keep scrolling down and up, the memory usage is getting higher and higher. How can I solve this problem? Or how can I release the memory?</p>
  
  <p>I know there are some related questions on here but I've tried many solutions and none of them works. </p>
  
  <p>For examples, </p>
  
  <p>1.
  I used Pure.component or shouldcomponentUpdate</p>
  
  <p>2.
  I used some props of Flatlist and SectionList</p>
  
  <pre><code>initialNumToRender={9}
  windowSize={10}
  maxToRenderPerBatch={2}
  removeClippedSubviews={true}
  disableVirtualization={true}
  getItemLayout={this.getItemLayout}
  keyExtractor={(item, index) =&gt; item[0]}
  extraData={this.state}
  </code></pre>
  
  <p>Is there any other solutions can help me solve the problems? Thanks a lot!</p>