At this moment, the plugin always sends full build artifacts (tons of media files and etc) over each build, which is an absolute overkill and waste of:

• resources & performance of Jenkins environment
• resources & performance of staging/production site 

so, whenever you have a chance, please implement this trivial things - before sending the artifact files, compare them to last sent file's md5 (or whatever) signature, and if content is not changed, don't resend. You can leave that 'option' by default turned off, but at least, give us way to enable that option.