Something as simple as caching all the js/css files into a single file
not only makes it lighter on the number of requests, but also makes a
single target for creating a cap task to minify/compress each of
these. There's a blog post on this somewhere around, but I can't find
it.
So, we tackle it in two steps.
1. Cache (in production only) using Rails' cache function
<%= stylesheet_link_tag 'reset', 'base', 'global', 'style', :cache =>
"cache/base" %>
<%= javascript_include_tag 'prototype', 'everything', 'else',
'application', :cache => "cache/base" %>
2. Use a cap task to YUICompress each
task :shrink_assets, :roles => :web do
run "java -jar /usr/lib/java/yuicompressor.jar --type js #
{current_path}/public/javascripts/cache/base.js -o #{current_path}/
public/javascripts/cache/base.js"
run "java -jar /usr/lib/java/yuicompressor.jar --type css #
{current_path}/public/stylesheets/cache/base.css -o #{current_path}/
public/stylesheets/cache/base.css"
end
But the tricky part is the caching only happens when a request is made
for the first time, so you've got to invoke another task which make a
wget request to a page, and then run the :shrink_assets task right
after.
task :cache_assets, :roles => :web do
sleep(3)
run "/usr/bin/wget -o http://127.0.0.1 >/usr/tmp"
end
I can see why you'd use Asset Manager to get around the :cache_assets
problem (annoying). Look forward to playing with Sprockets, has some
good concepts.
I'd be keen to hear what others are doing.
Cheers,
Nathan
On Jul 14, 11:56 am, Nathan de Vries <[email protected]> wrote:
> On 14/07/2009, at 10:51 AM, Chris Lloyd wrote:
>
> > The only sort of minifier worth its weight is one that does some
> > sort of lexical analysis of the JS source tree.
>
> Are you saying that the extra 10% compression gained from using a
> minifier like YUI Compressor is noticeably better than a reduction in
> HTTP requests using concatenation and standard HTTP compression
> (60-85%), to the point where you'd not use any other tool? That sounds
> a little crazy to me.
>
> Cheers,
>
> Nathan de Vries
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