Improve performance heatmap

[wlwatkins]

Hi,

what are the best ways of improving a heat map display

I get quite some sluggishness when displaying a 3D numpy array of 1200 by 360

import dearpygui.dearpygui as dpg
import numpy as np
dpg.create_context()

dpg.show_tool(dpg.mvTool_Metrics)
with dpg.window(label="Tutorial", width=400, height=400):
    
    values = np.random.rand(1200,360)
    with dpg.group(horizontal=True):
        dpg.add_colormap_scale(min_scale=values.min(), max_scale=values.max(), colormap=dpg.mvPlotColormap_Jet, tag=f"_legend")
        with dpg.plot(label="Performance test", height=-1, width=-1, crosshairs=True, anti_aliased =False, delay_search=True):
            dpg.bind_colormap(dpg.last_item(), dpg.mvPlotColormap_Jet)
            dpg.add_plot_axis(dpg.mvXAxis, tag=f"_x_axis", no_tick_marks=False, no_gridlines=False)
            dpg.add_plot_axis(dpg.mvYAxis, tag=f"_y_axis", no_tick_marks=False, no_gridlines=False)
            dpg.add_heat_series(values.flatten().tolist(), values.shape[0], values.shape[1], parent =f"_y_axis",  scale_min=values.min(), scale_max=values.max(), format="", tag=f"_plot", bounds_max=[values.shape[0]-0.5, values.shape[1]-0.5], bounds_min=[-0.5, -0.5])
                
dpg.create_viewport(title='Custom Title', width=800, height=600)
dpg.setup_dearpygui()
dpg.show_viewport()
dpg.start_dearpygui()
dpg.destroy_context()

when looking at this example https://www.youtube.com/watch?v=GPoQYTfQMxw it looks better, but i cannot make anything of his code https://github.com/Tschucker/Python-Digital-Phosphor-Display