Speed up simulation?

[ghost]

Hi,

I followed this tutorial in order to import a coupler. However, the width of my window is much wider than the tutorial, which makes the simulation last very long. (Even by exploiting the symmetries of the system) As I have a lot simulations to do, do you have any tips to speed it up ?

For information, I use vscode with WSL1. I've read that WSL takes as much RAM as possible by default, but I don't seem to have that on my computer. Do you know how to allocate more memory to WSL1?

Otherwise, would it be much faster directly with a linux distribution?

Thank you for your help!

[oskooi]

Meep 1.20 which will hopefully be released this week will introduce four new features for improving runtime performance that you can try out:

• switching from double- to single-precision floating point for the time domain and DFT fields (note: this will require building Meep from source using the --enable-single compiler flag)
• decimation of the DFT time series updates used by the mode monitors
• cache-oblivious loop tiling for the step-curl field updates (executed at every timestep by all voxels)
• improved chunk-to-chunk communication

Separately, we are working on a number of other performance-related enhancements: (1) improving the load balancing of parallel simulations through better cell partitioning using the split_chunks_evenly=False flag of the Simulation object and (2) using multi-threading for the time stepping (#1627). Stay tuned for more details.

[oskooi]

Closed by #1723 and release of Meep 1.20.0.