message: [Messages] Avoid generating new strings unnecessarily, use __id instead.
diff: @@ -105,7 +105,7 @@ export class Messages extends React.Component<Props, State> {
  inverted={!this.state.shouldStickFirstMessageToTop}
  data={this.state.shouldStickFirstMessageToTop ? messages.reverse() : messages}
  renderItem={this.renderMessage.bind(this)}
  - keyExtractor={(item, index) => index.toString()}
  + keyExtractor={({ __id }) => __id}
  onEndReached={this.loadMore.bind(this)}
  onEndReachedThreshold={0.2}
  onContentSizeChange={(width, height) => {
  @@ -153,6 +153,7 @@ export default createPaginationContainer(
  edges {
  cursor
  node {
  + __id
  impulse_id
  is_from_user
  body
  @@ -229,6 +230,7 @@ interface RelayProps {
  edges: Array<{
  cursor: string
  node: {
  + __id: string
  impulse_id: string
  is_from_user: boolean
  } | null
  