presto-orc/src/main/java/io/prestosql/orc/stream/FloatOutputStream.java/FloatOutputStream/getRetainedBytes
class FloatOutputStream:    @Override
    public long getRetainedBytes()
    {
        // NOTE: we do not include checkpoints because they should be small and it would be annoying to calculate the size
        return INSTANCE_SIZE + buffer.getRetainedSize();
    }