Inserting Many Hdf5 Datasets Very Slow

There is a dramatic slowdown when inserting many datasets into a group. I have found that the slowdown point is proportional to the length of the name and number of datasets. A lar

Solution 1:

Try using libver='latest' when you open the file. Recent versions of the library vastly improved the speed for adding items to a group, but for compatibility reasons this is only enabled with the above option.