Change products category with CSV in bulk is too slow

[vellstore]

Hi, I have a lot of products in a category, but I need to change it to another category, with sub categories,  this is the route I have for the cactegory 

> IMPORTACION USA>Relojes y Joyas USA>Relojes USA>Relojes de Pulso USA

So I decided to use a CSV file because those are like 30k products, and I used lines like this: 

 

First field is the ID of the product, active is to active the product in case I have pause them, and the category with sub categories using as separator this character "|"

The csv template is well done because it actually update the product category, but the issue is that it is doing it TOO SLOW, it takes almost an hour to update like 20 products or less.

Please maybe somebody has any idea why is that? and can you help me find a possible solution? What I need is to change the category and I know csv files take a lot of time when you upload pictures, and even like that it shouldn´t take that long,  but with the other files it should be faster, so please I NEED YOUR HELP.