jQuery 1.4 minified and gzip’ed can easily drop 424 bytes. Just omit needless line endings, replace true → !0, false → !1, 10000 → 1e4 and use the strongest gzip compression (gzip -9).
Even if the default gzip compression (gzip -7) is used, still 381 bytes can be omitted by performing these easy optimizations. See http://twitter.com/mathias/status/7765227300 and reply-links for more details. http://mathiasbynens.be/examples/jquery-1.4/jquery-1.4.raw.js (69,837 bytes) is the minified (non-gzip’ed) version, as hosted on Google’s CDN. http://mathiasbynens.be/examples/jquery-1.4/jquery-1.4.raw.js.gz (23,636 bytes) is the gzip’ed version of this (using gzip -9). http://mathiasbynens.be/examples/jquery-1.4/jquery-1.4.min.js (69,273 bytes) is the optimized minified (non-gzip’ed) version. http://mathiasbynens.be/examples/jquery-1.4/jquery-1.4.min.js.gz (23,383 bytes) is the gzip’ed version of this (using gzip -9). I realise this is just a detail, but if we’re doing micro- optimizations anyway, we might just as well do it better than Closure Compiler does.
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