@Override
  public IMeasurementSchema getSchema() {
    return iMeasurementSchema;
  }
MeasurementSchema takes 75B

<ul>
  <li>MeasurementSchema
      <ul>
        <li>Object header, 8B
        <li>String measurementId basic, 8 + 8 + 4 + 8 + 4 = 32B
        <li>type, encoding, compressor, 3 B
        <li>encodingConverter, 8 + 8 + 8 = 24B
        <li>props, 8B
      </ul>
</ul>
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/relational/metadata/fetcher/cache/SchemaCacheEntry.java