Query all items at once seems to slow.
Try to use the pagination and limit: for each query, we add two paramters: limit(number of items in one page) and page number.
These two parameters are not mandatory, the default values will be limit = 20, page number= 1.
catherine0422
commented
3 years ago 
Query all items at once seems to slow. Try to use the pagination and limit: for each query, we add two paramters: limit(number of items in one page) and page number. These two parameters are not mandatory, the default values will be limit = 20, page number= 1.