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Mesurer le temps de chargement d'une page
Le temps de chargement a un impact direct sur l'expérience utilisateur, et dans une moindre mesure sur le référencement naturel. Un développeur ou un référenceur doit dont chercher à diminuer au maximum ce temps de chargement. Et pour cela, il est toujours intéressant réaliser des tests avant et après vos modifications. Voici donc 5 outils pour réaliser un benchmark complet des performances de votre site. GTMetrix C'est de loin mon outil préféré.CSS Stress Testing and Performance Profiling | Andy Edinborough
I present you with the CSS Stress Test bookmarklet. Now let me explain: I have been losing my sanity over the oddest issue. The project I’m working on right now has a fairly complex stylesheet. Performance for the site is absolutely critical. I’ve done my best to squeeze and optimize every line I can. In all browsers, it runs like a champion.What does it do? The holmes.css file will display either an error (red outline) , a warning (yellow outline) , or a deprecated style (dark grey outline) for flags such as: Missing required attributes on tags , such as name attributes on inputs (lots of these) Potentially improvable markup , such as links with href="#" Deprecated and Non-W3C Elements - see W3C.org's article on obselete tags Non-W3C Attributes - as above, just the most important ones since there are MANY Thanks to Anthony Mann , holmes now displays an informative error message when you hover over the element. Support for :after/::after on images is non-existent however in most browsers.
holmes.css - CSS Markup Detective
I’ll admit it: I’m addicted to speed. No, not the psychostimulant; I’m talking about website speed . I’m not alone, either.

