Speed too slow when writing mat73

[zhengliuer]

Dear all,

I successfully wrote my data to .mat v7.3, but I noticed the speed was extremely slow. To compare, the same data cost me less than 1sec to write a v5 .mat, but about 47sec for a v73.

Is this as expected? Has anyone faced the same problem with me? Any ideas to solve this?

I will keep trying to find out why and the solution of it.

Best,
Zheng

[traversaro]

Indeed the time seems quite a lot, but if there is an issue, it may be more in matio https://github.com/tbeu/matio I guess, as matio-cpp only provides a C++ interface for the C functionalities provided in matio.

Anyhow, before opening an issue there, I think it make sense:

• Check if you are using the Release version of libmatio and matio-cpp, and not for some reason the debug version.
• If possible, provide a Minimal Reproducible Example of the issue (see https://stackoverflow.com/help/minimal-reproducible-example)

[zhengliuer]

Thanks! I will discuss the issue there.

[zhengliuer]

tbeu/matio#261 (comment)

I opened an issue in matio.

[traversaro]

I think that the mre should use matio, not matio-cpp, otherwise the mantainer does not know if the problem is in matio or matio-cpp. Furthermore, I would wait for having a working mre before opening an issue.

[S-Dafarra]

Hi @zhengliuer, did you happen to find the source of your issue?

[zhengliuer]

Hi @zhengliuer, did you happen to find the source of your issue?

Sorry, no. I was occupied by some other things, so I closed the issue for now. Now I have some time for this. And luckily, according to the test result from tbeu/matio#261 (comment), the performance degradation is confirmed.