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"Compuware APM Deep Transaction Management for PHP is the first solution in the market that combines User Experience Management (UEM), web server visibility, PHP deep-dive analysis, database access and external-call visibility all into one single solution, along with built-in performance analytics. It cuts through the complexity to provide full application visibility from a browser-click to the database and back, for all transactions, in real time 24x7. Compared to other PHP monitoring tools, Compuware APM's unique smart auto-detection of PHP pages makes it a snap to understand which page is causing what performance issues."

Deploying JavaScript Applications Preface: Nothing in this post is necessarily new, or even anything I thought of first (save for a name or two). via Pocket

Au sommaire, 23 liens sur : Arcep, Awwwards, scripts JS, DDoS et émotions, WebPageTest, FB Live, brotli et Varnish, métadonnées XML et images, 3rd party scripts, Offline First, WordPress to Hugo, Canonical AMP, démarrer en webperf, perf-tool

PunyPNG first analyzes the content of your image and figures out the best image format to use.

gros parti pris de Souders sur l'exécution de javascript : il ne devrait même pas être asynchrone, mais différé jusqu'à ce que la page soit rendue

Il n'a pas tout à fait tort, mais il oublie quand même pas mal de choses sur les interfaces modernes. Beaucoup n'ont pas de fallback, ou un fallback très mauvais. Genre un bouton commander qui ouvre une popin. Il est impossible d'envisager ne pas accrocher immédiatement le gestionnaire javascript

"I want to share with you my simple two-step secret to improving the performance of any website. 1. Make sure that the most important elements of the page download and render first. 2. Stop there."

"This method builds on the Flash of Faux Text (FOFT) using a two stages loading process (sounds like, but is not actually rocket science), but instead of a full Roman web font in the first stage, it loads a small subset of the Roman web font"

I've started experimenting with my home page to make it load even faster. Amazon famously does this too which you can read more about in this Steve Souders post. They make sure everything that needs to be visible above the fold is loaded first, then, it starts loading all the other "stuff" below the fold.

Assez d'accord avec les commentaires , il faut éviter que le crawler passe sur la ressource dédiée au chargement des huits autres articles, sinon il y a un risque de duplicate content. Pour éviter cela il faut gérer des règles pour robots.txt, est-ce suffisant ? Le découpage je le fais plutôt au niveau du styling CSS et JS. J'inclue le style css indispensable à l'affichage et charge le reste . Bref il y aussi le risque de reflow dans ce cas.

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We've come quite a long way since introducing RUM about a year ago. Being the first app performance company to build real user monitoring as a core, native feature of application performance management, we are currently monitoring about 750 million page views a day, 5 billion a week and 20 billion a month for 20,000 active accounts.

SPDY is awesome. It's the first real upgrade to HTTP in 10+ years, it tackles high latency mobile networks performance issues and it makes the web more secure. SPDY is different than HTTP in many ways, but its primary value comes from being able to multiplex many requests/responses from client to server over a single (or few) TCP connections.

la nouvelle version de catchpoint permet entre autre d'analyser l'impact des DNS et des CDN sur les perfs

You want to use @font-face, then you realize it's got some downsides. First of all, it's another http request, and ...