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                                            Junmin Gu

Slow down with repeated calls to ts.get_field() using io_reader

I think Remi used BP4 with file encoding. group encoding is stable. Processing file bp4-f/defaultBP4-node_diags/diag1/ Time to get fields: 0.0303 s Time to get fields: 0.0286 s Time to get...

Slow down with repeated calls to ts.get_field() using io_reader

So for the time being, switch to BP5 would be the easiest workaround. For fast performance, group based would be better than file based. Would be good to add read...

Slow down with repeated calls to ts.get_field() using io_reader

@franzpoeschel the plot time you have is for group based encodings. The time from bp4 and bp5 of both file/group encodings are in the plot below. ![time_comparison](https://github.com/openPMD/openPMD-viewer/assets/7468822/c4a10da8-797b-48c3-9f3d-cc1abd4ac23c)