Opening FST file gets permanently stuck

[Blebowski]

Hi,

I ran into issues when trying out surfer instead of GTKWave.

I use VUnit and dump waves from VHDL only TB. It is IP-level testbench, nothing super big,
but it has some complexity. I ran short test just to demonstrate the issue.

When I dump FST file, and try to open it with Surfer, the Surfer keeps loading the file
forever. This happends when I dump the FST file with NVC as well as with GHDL (the TB is completely equal
in both cases).

When I dump GHW file with GHDL, Surfer is able to open it, but it takes about 30 seconds
to load the data changes. Despite the GHW file working, I consider it enormous amount of
time to open such a small GHW file (about 5 MBs).

In Gtkwave, I can open both FST files instantly. Opening the GHW file takes about 2-3 seconds.

I opened original issue in surfer and they pointed me here:
https://gitlab.com/surfer-project/surfer/-/issues/384#note_2387169698

The files causing troubles:

surfer_bug.zip

[oscargus]

For GHW, it is the currently inefficient loading of parameters that contributes to the long load time. There is a recent MR for that: https://gitlab.com/surfer-project/surfer/-/merge_requests/604 so that should be fixed soon.

Thanks for creating the GHW. Glad that it worked (as I said, more likely that there are undiscovered issues there).

For FST, it gets stuck in wellen::read_header_from_file. (Just so @ekiwi knows what he will find...)