Skip plotting in TableReport when there are many columns

[jeromedockes]

Problem Description

If the table has 100 columns, it takes a long time to generate the histograms and I probably won't look a them all anyway.
There could be a user-controllable threshold (say, 30 columns) above which no plots are generated and we get only the scrollable sample and summary statistics. Not sure if column associations should still be computed.

Feature Description

below the threshold, plots are generated for all columns.
above the threshold, no plots are generated.

skrub.TableReport(df, max_n_plots=30)

skrub.patch_display(max_n_plots=40)

None means always plot. (and 0 means never plot because there are always at least 0 columns)

Alternative Solutions

No response

Additional Context

No response

[Vincent-Maladiere]

If column associations are not a major compute-time bottleneck, I'd favor keeping them.

[jeromedockes]

makes sense. I guess they will become the bottleneck once we remove the plotting, but they are very small compared to plotting. once we remove plotting we may not have any computation time problem anymore except for very large datasets

[GaelVaroquaux]

+1 Playing with the expressions PR, it felt to me like the suggestion here is an important one.