react-navigation/packages/core/src/StaticContainer.tsx

import * as React from 'react';

/**
 * Component which prevents updates for children if no props changed
 */
function StaticContainer(props: any) {
  return props.children;
}

export default React.memo(StaticContainer, (prevProps: any, nextProps: any) => {
  const prevPropKeys = Object.keys(prevProps);
  const nextPropKeys = Object.keys(nextProps);

  if (prevPropKeys.length !== nextPropKeys.length) {
    return false;
  }

  for (const key of prevPropKeys) {
    if (key === 'children') {
      continue;
    }

    if (prevProps[key] !== nextProps[key]) {
      return false;
    }
  }

  return true;
});