Plotting large-ish arrays using pcolormesh with current (e2c5918) matplotlib master looks like it might have a memory leak. Running the following code on matplotlib v1.3.1 produces aQuadMesh in approximately a second. However running the same code on matplotlib master floods the memory until either the pcolormesh call is aborted or it runs out of memory.

importmatplotlib.pyplotaspltimportnumpyasnpdata=np.random.rand(3000*3000).reshape(3000,3000)plt.pcolormesh(data)plt.show()