What's the problem with VASP outcar parser?

[samwaseda]

I just tested the VASP outcar parser on my computer, by parsing the outcar examples. It takes 3.81 microseconds for all 10 files. I had the feeling that there were a lot of discussions about the inherent problems of the parsers (e.g. reading file each time etc.), but I don't really see what's the problem if it takes only a fraction of microsecond for a file. Can someone remind me what was actually the problem again?

[niklassiemer]

That is in agreement with @ligerzero-ai findings. The problem seem to come from multiple (re)opening operations on the HDF file to store all the information. Thus, a parsing to a dict with subsequent writing to HDF will probably fix the issue.