Thanks @Emil for your answer 
The data is just 1260 rows one column and the index (dates) for the last share price closed from the last five years, I supposed that is a small (but I don’t know if its “very small” 
).
I saw your solution to use serving side caching, it looks pretty interesting, but I didn’t try to implement yet.
Related to using multiple callback versus using one to issues that are related each other, do you have an opinion? I read in the documentation that each callback spend additional time but I cant figure out if this time is compensated for using them in parallel.
Thanks again for your time.