why Plotly.react() is as slow as Plotly.newPlot()? updating single trace of many

Hi, I am trying to redraw only single trace in a plot of many traces (biophysical data). I tried to follow instructions in react-plotly and plotlyjs documentation:
https://plotly.com/javascript/plotlyjs-function-reference/#plotlyreact
Plot is updated but I don't see any performance improvement if I change only single element of data or all data elements:
Here is MWE in codepen
Briefly, I generated sample data 100 traces of 10000 points and changing only first trace with:

  data[0].x =  [...Array(10).keys()].map( c=> c/10) //change only first trace
  data[0].y =  [...Array(10).keys()].map( c=> Math.random())
  Plotly.react('myDiv', data, layout);

Drawing plot containing single trace takes just a split of second, but if I had already drawn many traces and I want to redraw only single trace, it takes same time as to redraw all traces (few seconds).
Am I doing something wrong?

Commencez par le MWE CodePen lié et comparez Plotly.react() à Plotly.newPlot() en utilisant les données indiquées de 100 traces et 10 000 points. Lisez la documentation liée de Plotly.react et suivez le chemin de mise à jour dans le dépôt ; l’issue ne nomme aucun fichier source ni aucun test. Le travail serait terminé après avoir identifié la cause des temps comparables et défini l’optimisation ou la modification de la documentation attendue.