Custom Renderer Getting Called multiple Times # Performance issue and UI Hangs

[mganji]

I have created a Custom renderer for a column .the created custom renderer is executed even when i change another column cell value.

This execution is happening multiple times.

like if i have a table with 3 rows ,3 columns and i have custom renderer for one column
then when i change the one cell value then custom renderer is getting executed 9 times instead of one time for that respective cell

is this by design?

if yes is there a way to avoid this redundant execution
i.e. when i make change in cell value only that cell related custom renderer should get executed.

similar to this below issue

Handsontable renderer performance

Hi! I have a table of size 55 rows x 9 columns (495 cell in total). Here is table settings: hot = new Handsontable(container, { data: getData(), manualRowMove: true, contextMenu: true, outsideClickDeselects: false, fixedColumnsLeft: fixedColumns, cells: function (row, col, prop) { var cellProperties = {}; cellProperties.renderer = myRenderer; return cellProperties; }, columns: getColumnHeaders(), colWidths: getColumnsWidths(), a…

please find below link for example

edit first name column and check in "Execution Count " Print in console

JS Bin

[mganji]

Bin Link for reference

JS Bin

[aleksandra_budnik]

Hi @mganji

Currently, if you change a single cell in the table the whole table is rerendered.

We are preparing ourselves to create eco-rendering process but it’s not scheduled yet.

[mganji]

is this issue fixed in PRO Version.?
if not
can we get this issue fixed on priority . if our organization opt to go for a PRO Version

[aleksandra_budnik]

This is not an issue. It was intended while creating.

After some time we decided that we should also allow users to pick cells to be rendered so we are preparing the eco-rendering system. However, it is not finished yet.

[mganji]

could you please tell us the tentative date by which eco-rendering system.this information will be helpful in deciding to for PRO version or non PRO version?

[aleksandra_budnik]

I hope that it will be online until the end of 2017. However, the work hasn’t been started (only some theoretical thesis).

[lior]

theoretical

It there a tentative date for the eco-rendering system?

[aleksandra_budnik]

Hi @lior

In the next version we’ll add a little change that will boost performance for scrolling. As the eco-rendering is a complex task we are postponing it. Each time we want to start there are some smaller issue that we need to fix before.
I highly encourage to check our Zenhub board for updates