Description
In the previous version, writing an image the first time with kaleido takes a little while (about 1 second), but further calls to write_image go much faster (hundredths of a second!)
In version 1.0.0, calling fig.write_image("plot.png") seems to take a fixed amount of time (> 1 second) for every call, with no speedup on subsequent calls.
(tests were all done on an Ubuntu 20.04 system with Chrome installed)
To reproduce:
import importlib.metadata
from time import perf_counter
import plotly.graph_objects as go
import kaleido
import numpy as np
def make_and_save_plot(filename):
start_time = perf_counter()
fig = go.Figure()
x = np.linspace(0, 10, 100)
y = np.random.random(100)
fig.add_trace(go.Scatter(x=x, y=y, mode="lines"))
fig.write_image(filename)
end_time = perf_counter()
print(f"Plot saved to {filename} in {end_time - start_time:.2f} seconds.")
print(f"Using Kaleido version: {importlib.metadata.version('kaleido')}")
print(f"Using Plotly version: {importlib.metadata.version('plotly')}")
make_and_save_plot("test-plot.png")
# repeat the plot creation to ensure it works multiple times
make_and_save_plot("test-plot-again.png")
make_and_save_plot("test-plot-again-again.png")Results: kaleido==0.2.1
Using Kaleido version: 0.2.1
Using Plotly version: 6.2.0
/tmp/kal/check_kaledio_speed.py:13: DeprecationWarning:
Support for Kaleido versions less than 1.0.0 is deprecated and will be removed after September 2025.
Please upgrade Kaleido to version 1.0.0 or greater (pip install 'kaleido>=1.0.0' or pip install 'plotly[kaleido]').
Plot saved to test-plot.png in 1.07 seconds.
Plot saved to test-plot-again.png in 0.04 seconds.
Plot saved to test-plot-again-again.png in 0.04 seconds.
Results: kaleido==1.0.0
Using Kaleido version: 1.0.0
Using Plotly version: 6.2.0
Plot saved to test-plot.png in 1.73 seconds.
Plot saved to test-plot-again.png in 1.72 seconds.
Plot saved to test-plot-again-again.png in 1.67 seconds.