Does libapache-mod-deflate cache compressed result?

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http://serverfault.com – I got some json files to be served by apache httpd and their size are pretty big. (~100KiB) So I put mod_deflate into httpd server and applied to application/javascript mime type. I think mod_deflate may burn more CPU powers to run gzip compression. Thus, if mod_deflate has no cache strategy for compressed contents, then 'Apache CPU Load' graph must be increased as Apache Bytes / Apache Requests increases. But cacti graph shows different result from my prediction. I adopted mod_deflate at about Tue 13:00, CPU Load went up sometimes, but it falls right after. My Question is : does mod_defl (HowTos)