网站速度优化和SEO一样属于营销的基本组成部分，常用的速度优化工具有：
– Pingdom Website Speed Test
– WebPagetest
– GTmetrix
– think with Google
– YSlow – Official Open Source Project Website
– Which loads faster?
– PageSpeed Insights
Magento实际上已经内置了一些优化的代码，下面我们以PageSpeed Insights来一一进行优化处理，这里Alan的一个站点初始分值Mobile为15分，Desktop为26分
PageSpeed Insights初始分值
1.Leverage browser caching
这项修改Mobile约提高21分，Desktop提高23分
首先进入System>Configuration>Developer修改JavaScript Settings和CSS Settings部分
Magento系统JavaScript和CSS代码合并
然后进入到.htaccess中修改如下版块(以下配置仅供参考，可根据实际情况进行调整)
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############################################
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## Add default Expires header
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## http://developer.yahoo.com/performance/rules.html#expires
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ExpiresActive On
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ExpiresDefault “access plus 1 year”
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ExpiresByType image/gif “access plus 1 month”
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ExpiresByType image/png “access plus 1 month”
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ExpiresByType image/jpg “access plus 1 month”
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ExpiresByType image/jpeg “access plus 1 month”
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ExpiresByType text/css “access 1 month”
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ExpiresByType application/javascript “access plus 1 month”
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设置的时间期限有：
years
months
weeks
days
hours
minutes
seconds
2.Enable compression
这项修改Mobile约提高13分，Desktop提高17分
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############################################
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## enable apache served files compression
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## http://developer.yahoo.com/performance/rules.html#gzip
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# Insert filter on all content
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SetOutputFilter DEFLATE
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# Insert filter on selected content types only
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AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css text/javascript
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# Netscape 4.x has some problems…
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BrowserMatch ^Mozilla/4 gzip-only-text/html
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# Netscape 4.06-4.08 have some more problems
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BrowserMatch ^Mozilla/4.0[678] no-gzip
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# MSIE masquerades as Netscape, but it is fine
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BrowserMatch bMSIE !no-gzip !gzip-only-text/html
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# Don’t compress images
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SetEnvIfNoCase Request_URI .(?:gif|jpe?g|png)$ no-gzip dont-vary
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# Make sure proxies don’t deliver the wrong content
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Header append Vary User-Agent env=!dont-vary
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以上两条优化后网站Mobile为49分，Desktop为68分
PageSpeed优化后
显然还有很大的优化空间
3.Eliminate render-blocking JavaScript and CSS in above-the-fold content
理论上在script标签里添加async或者将代码从head中向即可解决这一问题，，如未合并js前，可以添加params参数，如：
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defer 2
async
实际上在Magento中这部分需要对代码进行相对比较大的修改，网上有一个插件，Alan在测试时并未带来分值上的提升，感兴趣的朋友可以试一下：
https://github.com/gaiterjones/magento-pagespeed
4.Optimize images
对于图片的优化可以使用如下网站对图片进行压缩，或者使用cdn存放图片对图片加载进行提速
https://tinypng.com/
http://www.tuhaokuai.com/
至于其它的Minify的建议，Google给出了自己的建议：
To minify HTML, try HTMLMinifier
To minify CSS, try CSSNano and csso.
To minify JavaScript, try UglifyJS. The Closure Compiler is also very effective. You can create a build process that uses these tools to minify and rename the development files and save them to a production directory.
Google 官方的优化安装包：
https://developers.google.com/speed/pagespeed/module/
