Plotly Express Choropleth Map Animation loading extremely long

I am making an animated choropleth map of regions in Czechia. When I run it without the animation, purely on one set of the data it takes 7.5 seconds. Here is the code for that.

However when I tried making the animation I had to stop it after 16 hours without a solution. And the HTML file I was saving it in got almost to 1GB in size. Here is the code I use for the animation.

fig = px.choropleth(df_anim,
             locations=REGION_CODE_COL,
             featureidkey=fproperties.{REGION_CODE_COL},
             geojson=regions_json,
             color=REL_RANGE_TEXT,
             hover_name=REGION_NAME_COL,
             hover_data={
                 REGION_CODE_COL: False, 
                 REGION_NAME_COL: False, 
                 TIME_COL_NAME: False, 
                 REL_COL_NAME: False, 
                 REL_RANGE_TEXT: False,
                 REL_TEXT_COL: True
             },
             color_discrete_map=dict(zip(INTERVAL, COLOR)),
             category_orders={
                  REL_RANGE_TEXT : INTERVAL
              },
             animation_frame=TIME_COL_NAME,
             projection=orthographic
                   )
fig.update_geos(fitbounds=locations, visible=False)
fig.layout.updatemenus[0].buttons[0].args[1]['frame']['duration'] = 1000
fig.layout.updatemenus[0].buttons[0].args[1]['transition']['duration'] = 200
# fig.write_html(OUTPUT_HTML_FILE_NAME)
fig.show()

If anyone has any ideas on how to optimize this program I would really appreciate it. The main thing I don’t understand is why REL1506 which is data for year 2015 month 6 takes only 7.5 seconds to load but the animation over 12 months couldn’t finish in 1000minutes (I let it on overnight). I stripped the dataframe and the geojson to only the bare minimum needed for the animation which took the HTML filesize down by about 30% but still wasn’t enough.

Larger regions geojson (1MB), dataframe (2500 rows), animation + HTML file saved (1 minute) Smaller regions geojson (9MB), dataframe (75000 rows), animation + HTML file saved (couldn’t do it in 1000minutes and the HTML file appeared in my folder after about 6 minutes)