I have data to upload on Facebook custom audience, files are usually 1 million + lines. Each line contain one mobile number. Facebook graph api support maximum 10000 mobile numbers to upload in single api call.
I am reading file by Java 8 Streams & then combine 10000 chunk and upload to facebook graph rest api.
It is happening serial way, and takes a lot of time. Is there any other best way to do it speedy?
