Hi. I am setting up a large inbound only system with multiple DIDs coming in; each call is processed fairly intensively with db lookups, wav files played, pocketsphinx is used, wav files recorded, etc. 

Before I get too far down one path, I was wondering if anyone had any insight into the best, most scaleable way to do this out of the several methods I can do:

1 Call comes in
dialplan calls specific javascript based on DID
javascript uses ODBC to pull info from local mysql db
call is handled in javascript

2 Call comes in
dialplan calls specific javascript based on DID
javascript uses CURL to get info from local mysql db
call is handled in javascript

3 Call comes in
php socket is listening for call
php script runs, pulling info from mysql db
call is handled in php using esl.php

4 Call comes in
dialplan calls specific lua script  based on DID
lua uses luasql.mysql to get info from local mysql db
call is handled in lua using lua api

5 Call comes in
xml_curl is used for dynamic dialplan
js called, continues like #1

I know that they will all do essentially the same thing. But once I go down the path, I don't want to find out that the way I chose chokes with 50 simultaneous inbound calls on different DIDs. Any comments would be appreciated. Thanks.

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Greg