execute multiple curl in single script code example

Example 1: how much fast syc we can send via curl ?

curl http://example.com/?update_=1 & curl http://example.com/?update_=2 & curl http://example.com/?update_=3

Example 2: curl multiple requests

Just include your regex pattern inside a [regex_pattern] as follows:
curl 'www.exampledomain/examplepath?siteid=[0-9]' 
#Calls url with every digit from 0 to 9