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Quake-like game made with JavaScript takes up just 13KB of storage
(www.tomshardware.com)
This is a most excellent place for technology news and articles.
Sometimes a program is slow to start up because it's so boated that just loading it from the disk takes multiple seconds. Wasting a few kB doesn't hurt anything, but if you're doing it thousands of times in one program, your users are gonna have a bad time.