Issue Report Checklist
Problem Description
Interactive plots and related features (UI, X/Y data for the cursor) are very slow (unusable).
Issue only occurs with Matplotlib's pcolormesh when it is the top layer; if I layer a new axis over a pcolormesh and plot a line the UI and X/Y data pts work in real-time - though they aren't relevant for the pcolormesh plot. If I plot multiple pcolormesh plots the lag gets worse. A single plot is roughly usable with patience, multiple pcolormesh plots plotted at once is unusable.
The task manager shows a python process goes to 100% on 1 thread when the mouse is over the plots - when not interacting with them they drop to idle.
Was not always the case, but not sure what Spyder (and other related interactive plot packages) I had before I updated to the latest.
What steps reproduce the problem?
- Plot a pcolormesh plot
What is the expected output? What do you see instead?
Smooth interactive plots.
Versions
- Spyder version: 5.3.1 None
- Python version: 3.9.7 64-bit
- Qt version: 5.15.3
- PyQt5 version: 5.15.4
- Operating System: Windows 10
Dependencies
# Mandatory:
atomicwrites >=1.2.0 : 1.4.0 (OK)
chardet >=2.0.0 : 4.0.0 (OK)
cloudpickle >=0.5.0 : 2.1.0 (OK)
cookiecutter >=1.6.0 : 2.1.1 (OK)
diff_match_patch >=20181111 : 20200713 (OK)
intervaltree >=3.0.2 : 3.0.2 (OK)
IPython >=7.31.1;<8.0.0 : 7.33.0 (OK)
jedi >=0.17.2;<0.19.0 : 0.18.1 (OK)
jellyfish >=0.7 : 0.9.0 (OK)
jsonschema >=3.2.0 : 4.6.0 (OK)
keyring >=17.0.0 : 23.6.0 (OK)
nbconvert >=4.0 : 6.5.0 (OK)
numpydoc >=0.6.0 : 1.4.0 (OK)
paramiko >=2.4.0 : 2.11.0 (OK)
parso >=0.7.0;<0.9.0 : 0.8.3 (OK)
pexpect >=4.4.0 : 4.8.0 (OK)
pickleshare >=0.4 : 0.7.5 (OK)
psutil >=5.3 : 5.9.1 (OK)
pygments >=2.0 : 2.12.0 (OK)
pylint >=2.5.0 : 2.14.1 (OK)
pyls_spyder >=0.4.0 : 0.4.0 (OK)
pylsp >=1.4.1;<1.5.0 : 1.4.1 (OK)
pylsp_black >=1.2.0 : 1.2.1 (OK)
qdarkstyle >=3.0.2;<3.1.0 : 3.0.2 (OK)
qstylizer >=0.1.10 : 0.2.1 (OK)
qtawesome >=1.0.2 : 1.1.1 (OK)
qtconsole >=5.3.0;<5.4.0 : 5.3.1 (OK)
qtpy >=2.1.0 : 2.1.0 (OK)
rtree >=0.9.7 : 0.9.7 (OK)
setuptools >=49.6.0 : 62.3.3 (OK)
sphinx >=0.6.6 : 5.0.1 (OK)
spyder_kernels >=2.3.1;<2.4.0 : 2.3.1 (OK)
textdistance >=4.2.0 : 4.2.2 (OK)
three_merge >=0.1.1 : 0.1.1 (OK)
watchdog >=0.10.3 : 2.1.9 (OK)
zmq >=22.1.0 : 23.1.0 (OK)
# Optional:
cython >=0.21 : 0.29.28 (OK)
matplotlib >=3.0.0 : 3.5.1 (OK)
numpy >=1.7 : 1.20.3 (OK)
pandas >=1.1.1 : 1.4.1 (OK)
scipy >=0.17.0 : 1.7.3 (OK)
sympy >=0.7.3 : None (NOK)
Issue Report Checklist
conda update spyder(orpip, if not using Anaconda)jupyter qtconsole(if console-related)spyder --resetProblem Description
Interactive plots and related features (UI, X/Y data for the cursor) are very slow (unusable).
Issue only occurs with Matplotlib's pcolormesh when it is the top layer; if I layer a new axis over a pcolormesh and plot a line the UI and X/Y data pts work in real-time - though they aren't relevant for the pcolormesh plot. If I plot multiple pcolormesh plots the lag gets worse. A single plot is roughly usable with patience, multiple pcolormesh plots plotted at once is unusable.
The task manager shows a python process goes to 100% on 1 thread when the mouse is over the plots - when not interacting with them they drop to idle.
Was not always the case, but not sure what Spyder (and other related interactive plot packages) I had before I updated to the latest.
What steps reproduce the problem?
What is the expected output? What do you see instead?
Smooth interactive plots.
Versions
Dependencies