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Maxime Dantec Warry

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Warry /
Created Dec 11, 2012
How to make faster scroll effects?

How to make faster scroll effects?

  • Avoid too many reflows (the browser to recalculate everything)
  • Use advanced CSS3 for graphic card rendering
  • Precalculate sizes and positions

Beware of reflows

The reflow appens as many times as there are frames per seconds. It recalculate all positions that change in order to diplay them. Basically, when you scroll you execute a function where you move things between two reflows. But there are functions that triggers reflows such as jQuery offset, scroll... So there are two things to take care about when you dynamically change objects in javascript to avoid too many reflows:

View gist:3890290
Monitor is a simple HTML/JS based application. It allows requesting JSON apis, with an history.
This gist is used to try the demo requests on start.
Warry / gist:2362973
Created Apr 11, 2012
My thoughts about meteor.js
View gist:2362973

Lately, with the help of Julien Tournay, I wondered how can we resolve the model problem in the browser which is : there is no ONE true model, and one information can be duplicated in multiple places (eg: form, list, item). Finally, I found out that the real datas are from : the forms > the server > the DOM. Meteor solved this by keeping this order, and synchronize it all in real time ! That's truly great. But. There a hudge cost in this : you have an heavy fullstack architecture, and you can't have control on the async which is black magic. Also, It's made for realtime, so concurrency apps. With Node.js in one thread, I can't imagine an app with thousands of users at the same time managing as much states properly. There is no holly grail. Just code!


XRefresh for Chrome

Deprecated! Use LiveReload instead.

via xrefresh#17

How to use

  • ruby ws_dir_watcher.rb ~/my_site
  • Open chrome://extensions/
  • "Developer mode", then press "Load unpacked extension" button
Warry / Refresh yourCSS: Bookrmarklet
Created Oct 27, 2010
Modify +R shortcut to refresh only the CSS files
View Refresh yourCSS: Bookrmarklet
javascript:void(function(){window.addEventListener("keydown",function(e){if(e.metaKey && e.keyCode==82){e.preventDefault();var i,a,s;a=document.getElementsByTagName('link');for(i=0;i<a.length;i++){s=a[i];if(s.rel.toLowerCase().indexOf('stylesheet')>=0 && s.href){var h=s.href.replace(/(&amp;|%5C?)forceReload=d+/,'');s.href=h+(h.indexOf('?')>=0?'&amp;':'?')+'forceReload='+(new Date().valueOf())}}return false}})})();
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