Open tfussell opened 2 years ago
Are there any unintentional copies of the data structures being made in the code that could be quickly eating memory and ultimately slowing stuff down?
As I have never come across such poor performance so far in my use of xlnt, do you have an example of a such an xlsx file that I could use to take a look at the code? Or a method to generate one?
There have been several users reporting performance problems over the years. I believe the current data structure for cells involving a vector of structs containing cell data and a hash map of cell references pointing to those cell structs is the cause of these problems. Some ideas for improving it:
The solution will require deciding on which factors are most important: read speed, write speed, insert speed, etc, writing benchmarks for these factors, and implementing it in the code.