Optimized Version of Rails MySQL Session Store is Available
The Problem Original ActiveRecord sessions store is slow. It is fine for some low traffic sites, but it is too slow to use it for something larger. First of all, it is slow because ActiveRecord itself...
View ArticleGZIP Compression and Javascript Minification
Compressing content on server before sending it over HTTP is a good practice since it saves a lot of traffic and makes transfers faster. For example, Prototype.js is 123KB size and after Gzip...
View ArticleCaching HTTP Headers, Cache-Control: max-age
Caching speeds up repeated page views and saves a lot of traffic by preventing downloading of unchanged content every page view. We can use Cache-Control: max-age=… to inform browser that the component...
View ArticleUsing CSS Image Sprites
Even fast connections suffer from multiple HTTP request overhead because of network latency and HTTP request processing overhead. MSIE7 opens no more than 2 connections per domain, Firefox3 – 4-6...
View ArticleCaching HTTP Headers, Last-Modified and ETag
What if we cannot predict lifetime of page content? If we have a page with info that changes unpredictably we still can use browser cache to avoid unneeded traffic. Using validation mechanism browser...
View ArticleStylesheet Composition
Browsers cannot start rendering till all Stylesheets loaded. Visitors see blank page (or previous page) during loading of CSS so it’s especially important to load these components faster. If you have...
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Website Speed Optimization and Waterfall Diagram
Waterfall diagram is useful to find out how browser spending time loading page components. There is a an opensource tool built for IE called AOL Pagetest. It has online version where we can check sites...
View ArticleAutomated Data:URI CSS Sprites
Recently I found another interesting service: DURIS (Data URI Sprites). This is an automated solution for building Data:URI CSS Sprites for background images. Basically you provide a page URL, then the...
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