Mat_VarReadNextInfoIterate takes a long time to read mat-file

[GolubevaP]

Reading the header by indexes takes a lot of time (several minutes), moreover, it requires a lot of memory to read it. Although this is only needed to make sure that the file can be opened.
I realized that the problem is in this method (Mat_VarReadNextInfoIterate), in particular, in nested loops. And also this problem met earlier (#157). Will you fix it?

[Ri0n]

Hello dear developers.

This PR #197 partially resolves the problem.
But the root of the problem is hidden in usage of H5Iget_name which is extremely slow. I have another patch to resolve it too. Not yet ready for publishing though.

[Ri0n]

And there is a PR for avoiding usage of H5Iget_name
https://github.com/Ri0n/matio/pull/1/files

[Ri0n]

A PR for H5Iget_name against this repo #198
I'm very worried if I could break anything with this change. So I hope developers can propose appropriate tests and teest it on their own.

[tbeu]

@Ri0n Thanks for both your PRs. They are very appreciated.

[tbeu]

@GolubevaP Which MAT-file version did you use? Do you have any MAT-file to share? Thanks.

[tbeu]

@GolubevaP Which MAT-file version did you use? Do you have any MAT-file to share? Thanks.

@GolubevaP Since #157 is fixed and @Ri0n contributed his fixes, can you please test again. Thanks!

[tbeu]

Closing after @GolubevaP not responding.