Sergey Chernyshev

Upcoming PageSpeed 1.9 has a few new rules implemented and ShowSlow needs to keep up. Welcome ShowSlow 0.9 with updated beacon. New rules displayed include: Avoid CSS @import Avoid document.write Combine images using CSS sprites Prefer asynchronous resources Just follow upgrade instructions if you already have an instance running. Or you can download code package…

I don’t know about you, but I’ve been using WebPageTest a lot lately – having a web-based app always available makes wonders! Testing one page over and over again is quite common when working on optimization for a particular site so I’ve added WebPageTest form to a details page on ShowSlow long time ago. This…

Sometimes it’s hard to quantify the benefits of performance improvements. Many tools try to show you data and many rule-based tests and best practices exist to describe the goals, but there is still no clear connection in business people’s heads between particular site’s performance and savings or profits that performance optimization projects will bring. As…

Summer is over, we’re all vacation-recharged and it’s time for some serious Web Performance! Come out of your sleepy summer mood and join us for next New York Web Performance session. September 15 at 5:45PM (time is updated) at Logicworks: RSVP here: http://www.meetup.com/Web-Performance-NY/calendar/14568561/ Philip Tellis (@bluesmoon) will be speaking at New York Web Performance group…

A few people got interested in drop-in web performance .htaccess file so I decided to move it to a separate project on Github and invite all of you to participate in building a simple solution for web site performance that anyone can use! github.com/sergeychernyshev/.htaccess Go, fork it! We have a lot of work to do:…

Time for some serious speeding up for our web sites! Come join us at Meet for SPEED event at Logicworks next Tuesday, August 24th at 7:00PM! RSVP: http://www.meetup.com/Web-Performance-NY/calendar/14209517/ Bring your laptop and we’ll work together on optimizing our sites! You can benefit even if you can’t edit your site right now – we will be…

A special guest, Andreas Grabner is coming to New York City to present new features of upcoming dynaTrace AJAX Edition 2.0 at NY Web Performance Meetup! dynaTrace AJAX Edition is a free tool that provides full JavaScript, Network, Rendering, DOM and XHR tracing for Internet Explorer 6, 7 & 8. With the latest version the Ajax…

This Thursday I gave a talk at NY Web Performance about third-party content and topic proven to be quite hot with many people in the audience, good Q&A and group discussion afterwards. We talked about ad banners, widgets and tracking “pixels” and overall theme was lack of control and heavy reliance on 3rd parties. Ads…

A few changes were made to ShowSlow in a past couple months so it’s time for a new release – welcome ShowSlow 0.7! Full list of changes can be seen in bug tracker, but here are the most important ones: Resolved a problem with missing mod_rewrite (#43) A few people complained that timeplot charts and…

Third party content slows down our site while we don’t have control over it. Ad banners, JavaScript widgets, analytics trackers – they all contribute to site’s slowness and sometimes are biggest offender. On July 22nd, I’m going to give a presentation entitled “Taming third-party content: ads, widgets, trackers” at New York Web Performance Meetup. If…