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Asked: 2026-06-07T02:30:55+00:00

I have an unbound datagridview with 175 columns and 50,000 rows, populated primarily with

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I have an unbound datagridview with 175 columns and 50,000 rows, populated primarily with doubles. According to my calculations, this equates to a memory usage of 175*50000*8 bytes = 70 MB. However, Task Manager says the grid is using about 1.2 GB of memory – an 17x overhead! Can anyone explain why it’s consuming so much memory?

From the msdn article on scaling the datagridview ( http://msdn.microsoft.com/en-us/library/ha5xt0d9.aspx ) I don’t think I’m doing anything flagrantly wrong. I’m not setting styles or contextmenustrips for individual cells. No modifications other than populating the cell values and setting format strings on column level.

I understand that virtual mode or shared rows might decrease memory consumption, but given my above calculations, I don’t think it should be necessary. 17x overhead doesn’t sound right to me.

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1 Answer

  1. Editorial Team

    Keep in mind that each cell of your DataGridView holds a DataGridViewCell instance, containing about 33 properties. It’s more overhead than just a double value.

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