Hochdichte Array-Puffer-Bitmasken-Indexierung für virtualisierten React-Grid-Zustand

class GridBitmaskStore {
  constructor(totalRows) {
    this.buffer = new Uint8Array(Math.ceil(totalRows / 8));
  }
  setBit(index, value) {
    const byteIndex = index >> 3;
    const bitPosition = index & 7;
    if (value) {
      this.buffer[byteIndex] |= (1 << bitPosition);
    } else {
      this.buffer[byteIndex] &= ~(1 << bitPosition);
    }
  }
  getBit(index) {
    return (this.buffer[index >> 3] & (1 << (index & 7))) !== 0;
  }
}