Altair: [question] Apache arrow support in altair ?

[djouallah]

I read that apache arrow is supported now in vega-lite using a separate vega-loader, is this something that altair will support.

for anyone who used Apache arrow, is the performance way better than csv, my current project has a dataset of 60000 line and it is a bit slow, specially for brushing

[jakevdp]

Arrow support in Vega/Vega-Lite is an open issue: https://github.com/vega/vega/issues/1300. Once it's available there, we will work to make it available in Altair

[djouallah]

Thanks, I was referring to this https://github.com/vega/vega-loader-arrow

[doug]

now that there is the vega-loader-arrow. What should support in altair look like?

[jakevdp]

It would first have to be supported by Vega-Lite.

[jakevdp]

Vega-Lite's schema does not yet allow the arrow format: https://github.com/vega/schema/blob/master/vega-lite/v4.11.0.json#L5526-L5541