Method get_buffer_memory_size

arrow-data/src/data.rs:484–496

Returns the total number of bytes of memory occupied by the buffers owned by this [`ArrayData`] and all of its children. (See also diagram on [`ArrayData`]). Note that this [`ArrayData`] may only refer to a subset of the data in the underlying [`Buffer`]s (due to `offset` and `length`), but the size returned includes the entire size of the buffers. If multiple [`ArrayData`]s refer to the same un

(&self)

    /// If multiple [`ArrayData`]s refer to the same underlying
    /// [`Buffer`]s they will both report the same size.
    pub fn get_buffer_memory_size(&self) -> usize {
        let mut size = 0;
        for buffer in &self.buffers {
            size += buffer.capacity();
        }
        if let Some(bitmap) = &self.nulls {
            size += bitmap.buffer().capacity()
        }
        for child in &self.child_data {
            size += child.get_buffer_memory_size();
        }
        size
    }

    /// Returns the total number of the bytes of memory occupied by
    /// the buffers by this slice of [`ArrayData`] (See also diagram on [`ArrayData`]).