panel: Tabulator very slow with large number of columns

When you run the code below and 1) Navigate to the “Dataset” page 2) click “Load” you

• experience a very, very slow application

import panel as pn
import pandas as pd
import numpy as np


pn.extension(sizing_mode = 'stretch_width')

df = pd.DataFrame()

ID_CreditSC_App = pn.template.BootstrapTemplate()

mainColumn = pn.Column()

df_tabulator = pn.widgets.Tabulator(df,name='Original Dataset', disabled =True, height=400, pagination='local', page_size=50)
df_tabulator1 = pn.widgets.Tabulator(df,name='Original Dataset', disabled =True, height=400, pagination='local', page_size=50)

tabs_dataset = pn.Tabs(
    (df_tabulator),
    (df_tabulator1)
)

multiSelect = pn.widgets.MultiSelect(name='Segmentation value', size=8)

btn_main    = pn.widgets.Button(name='Main')
btn_dataset = pn.widgets.Button(name='Dataset')
btn_loadSelector = pn.widgets.Button(name='Load')
btn_loadTable = pn.widgets.Button(name='Load')

def mainClick(event):
    mainColumn[:] = mainView

def datasetClick(event):
    mainColumn[:] = datasetView

def init_df():
    for i in range(100):
        df.insert(0, 'Column' + str(i), np.random.randint(0, 10, 10000))

def loadSelector(event):
    multiSelect.options = df['Column1'].values.tolist()

def loadTable(event):
    df_tabulator.value = df
    df_tabulator1.value = df



btn_main.on_click(mainClick)
btn_dataset.on_click(datasetClick)
btn_loadSelector.on_click(loadSelector)
btn_loadTable.on_click(loadTable)


mainView = [btn_loadSelector,multiSelect]
datasetView = [btn_loadTable, tabs_dataset]

init_df()

ID_CreditSC_App.sidebar.append(btn_main)
ID_CreditSC_App.sidebar.append(btn_dataset)
ID_CreditSC_App.main.append(mainColumn)
ID_CreditSC_App.servable()

Panel: 0.12.0a11