improving performance of SAS application

i am working on an app that has the following:
frontend: html, js, and angular
middle tier: java restful service that simply converts data into JSON
backend: SAS service that the restful service methods call
oracle DB

i am trying to improve performance.  i tried moving most of the processing/business logics from the frontend to the java restful service layer, but didn't see any major improvement. another area of concern is that the DB is not located in the same location as the SAS service, which in turn is not co-located with the restful service layer.  so i see a lot of network latency and firewall issues that could be addressed.  also, i am wondering if it wouldn't be better to replace the SAS service with a JPA framework, with entity classes and DAO classes underneath the restful service.  what about using JDBC template to make direct calls to the DB, will scalability be an issue? thanks.
mmingfeilamAsked:
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DavidConnect With a Mentor PresidentCommented:
Well, Java is an absolute pig in every aspect. If you are doing REST / JSON, then any way you can get away with a simple browser as the front end and a javascript library?

We're talking 1/100th of the same footprint.  Besides JAVA is just so insecure and you're finding more governments, businesses, and even end users saying no way will they let a JAVA app in the door.

You don't need JAVA to get to an oracle or any other database. Strip down the layers.  Look at jquery and some of the other libraries, and an embedded browser, php, perl, node.js or some other lightweight gateway.
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mmingfeilamAuthor Commented:
i found that JPA caching does the trick, the speed improved dramatically.
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DavidPresidentCommented:
Great.  For what it is worth, my son is in college now and the university is just finally flat out saying that JAVA is dead, and don't even think of turning in any project that uses JAVA unless it is a program to help migrate away from it.
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