MT5 RAM memory voraciousness, problems with reading/writing large files - page 5
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so it's a 2-dimensional array, a matrix. Write it.
Can you show me an example of how to write and read multidimensional arrays? It's clear in theory, but the implementation is not clear.
Can you show me an example of how to write and read multidimensional arrays? It's clear in theory, but the implementation is unclear.
Just like one-dimensional arrays, with WriteArray()
I'm comfortable using the class, I've been using it for 3 years now, since MT4 - it's handy, but damn, it's slow.
Of course it's easy to read a string, but turning it all into a working cell structure is much harder.
What do you mean I can't use classes? I do, and besides, the metaquote employee wrote the class. And then, I actually hired a person, paid and expected to get a finished product, but I was told that it's OK to be slow... I believed them, but now I've got the memory overkill as well - I'm outraged.
The class is designed for small files. It doesn't matter at all who created the class. Now we need a different approach to reading a file, so that class handles that file poorly.
The class is designed for small files. It does not matter at all who created the class. Now you need a different approach to reading a file, so that class doesn't handle that file well.
I'll perpetuate it. Fucked up, thank you.
just like one-dimensional ones, through WriteArray()
Found an example, I'll have to try it, I'll have to write two files - for general understanding and probably to speed up processing.
Thank you.
Added: I understand that you can write only 1 array at a time, which of course is not very convenient.The class is designed for small files. It does not matter at all who created the class. Now you need a different approach to reading a file, so that class does not handle that file well.
If memory serves me correctly, I immediately said that we need to work with large files, and for example, a large file was given - tens of megabytes, if not a hundred (we need to watch the correspondence, and in the current format it is not convenient to do).
Found an example, have to try it, will have to write two files - for general understanding, and probably to speed up processing.
Thank you.
Added: I understand that you can write only 1 array at a time, which of course is not very convenient.Very convenient :)
very handy :)
Not convenient because you have to create a separate file for different types of data.
Not convenient, as you have to create a separate file for different types of data.
Well, you can put it in the same directory so that it is not scattered. You won't have any problems. That's what I always do for experts. I immediately create a directory called program name/account number and I put all the files in it.
I recommend making a minimal change first, so that memory reallocation is done less frequently. Two lines
m_total_rows++;
ArrayResize(m_cells,m_total_rows*m_total_columns,10000);
in bool CSVReader::AddData(string data_str,bool header) replace with
m_total_rows++;
if (m_total_rows*m_total_columns>ArraySize(m_cells)) ArrayResize(m_cells,2*m_total_rows*m_total_columns);
The number of memory reallocations with copying should become O(log(n,2)) instead of O(n). 20 instead of 600 thousand. Maybe that's enough for you now.