# Sending Variable Length Messages

Some business applications always send the same size output; other applications send out different length messages based on business criteria.

For example, when you send an image (.jpg file), the message should be a variable length. Images can vary in size from 5K, 10K, 100K, 1MB, and larger. It is not good practice to send a 1MB message with only 5K of data, so the variable length message is very important to performance. Variable length messages can be sent by using TIBCO EMS or TIBCO Rendezvous.

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