Function pickArbitraryLane

packages/react-reconciler/src/ReactFiberLane.js:763–769

(lanes: Lanes)

}

export function pickArbitraryLane(lanes: Lanes): Lane {
  // This wrapper function gets inlined. Only exists so to communicate that it
  // doesn't matter which bit is selected; you can pick any bit without
  // affecting the algorithms where its used. Here I'm using
  // getHighestPriorityLane because it requires the fewest operations.
  return getHighestPriorityLane(lanes);
}

function pickArbitraryLaneIndex(lanes: Lanes) {
  return 31 - clz32(lanes);