PUBLIC MARKS with search latency

Around this time last year, I wrote about how we need to get back to allowing conversation to occur without texting, emailing, browsing, Tweeting, Facebooking, or doing whatever else zeros and ones can do these days on smart phones, iPads, notebooks, etc. I am as guilty as the next person of falling for the perception that any response latency is unacceptable.

boomerang is a piece of javascript that you add to your web pages, where it measures the performance of your website from your end user's point of view. It has the ability to send this data back to your server for further analysis. It allowsto measure the round-trip time, bandwith usage and latency.

* UbuntuStudio/9.04release_notes Ubuntu Studio is a multimedia editing/creation flavor of Ubuntu, built for the GNU/Linux audio, video, and graphics enthusiast or professional. The Ubuntu Studio team is proud to announce its fifth release: Ubuntu Studio 9.04. With this release, which you can download in a 1.2GB DVD, Ubuntu Studio offers a pre-made selection of packages, targeted at audio, video and graphics users. Ubuntu Studio greatly simplifies the creation of Linux-based multimedia workstations. For Ubuntu Studio 9.04 we have continued to update packages and fix critical bugs to better the Ubuntu Studio user experience. We are happy to announce the real time kernel will be installed by default in Ubuntu Studio in this release, if the audio task is selected. We have tested it heavily and are happy with it's performance in audio environments. The art has had a cool facelift. The gtk theme has been improved staying in the 'Studio' style. Plus the gdm theme has been switched to some great new eyecandy. New applications included: * FFADO firewire soundcard drivers * Calf audio plugins * LMMS (updated and included in the meta packages) Features/Fixes/Improvements: * Heavily tested 2.6.28 realtime kernel for low-latency audio work * Jack Connection Kit upgraded to 0.116.1 (a major improvement) * Ardour upgraded to 2.7.1 * Fresh ubuntustudio-looks improvements * Addition to Ubuntu Studio Controls to allow users to maintain o Ctr Alt Backspace behavior See the Ubuntu release notes for other non Ubuntu Studio specific changes. See http://calf.sourceforge.net/ for more information about CALF. As our wiki page at https://wiki.ubuntu.com/UbuntuStudio states, "our aim is to make it more accessible for new users to get into the tools that GNU/Linux has to offer for multimedia creation and production. We also want to spotlight what's out there, and show users tools they might not know to exist." Thanks to all who helped in Ubuntu Studio 9.04's creation! UbuntuStudio/9.04release_notes (editada pela última vez em 2009-04-24 20:46:52 por Luis de Bethencourt Guimerá)

After some recent optimizations, the Dojo Cometd implementation of the Bayeux protocol running on the Jetty web server can now handle up to 20,000 simultaneous users per server while maintaining sub-second latency.

impressive numbers. Does the Twisted one can beat that?

Linux Low latency Howto.

Caching is the temporary storage of frequently accessed data in higher speed media (typically SRAM or RAM) for more efficient retrieval. Web caching stores frequently used objects closer to the client through browser, proxy, or server caches. By storing "fresh" objects closer to your users, you avoid round trips to the origin server, reducing bandwidth consumption, server load, and most importantly, latency. This article shows how to configure your Apache server for more efficient caching to save bandwidth and improve performance. Caching is not just for static sites, even dynamic sites can benefit from caching. Graphics and multimedia typically don't change as frequently as (X)HTML files. Graphics that seldom change like logos, headers, and navigation can be given longer expiration times while resources that change more frequently like XHTML and XML files can be given shorter expiration times. By designing your site with caching in mind, you can target different classes of resources to give them different expiration times with only a few lines of code.

Caching is the temporary storage of frequently accessed data in higher speed media (typically SRAM or RAM) for more efficient retrieval. Web caching stores frequently used objects closer to the client through browser, proxy, or server caches. By storing "fresh" objects closer to your users, you avoid round trips to the origin server, reducing bandwidth consumption, server load, and most importantly, latency. This article shows how to configure your Apache server for more efficient caching to save bandwidth and improve performance. Caching is not just for static sites, even dynamic sites can benefit from caching. Graphics and multimedia typically don't change as frequently as (X)HTML files. Graphics that seldom change like logos, headers, and navigation can be given longer expiration times while resources that change more frequently like XHTML and XML files can be given shorter expiration times. By designing your site with caching in mind, you can target different classes of resources to give them different expiration times with only a few lines of code.

In this HowTo, I will explain how you can secure your network from virus and other malware, by installing ClamAV and integrating it with SafeSquid, to scan all in-coming content for virus, and block all infected content at the HTTP Gateway, even before it enters your network. Virus Security In SafeSquid SafeSquid has built-in connectivity to various daemon based anti virus software like ClamAV, Sophos, Avast, F-Prot, NOD32 and Kaspersky. It also has a universal ICAP (Internet Content Adaptation Protocol) client that can be used to connect to ICAP based security software like Dr.Web ICAP, Kaspersky Antivirus for Proxy Server, Trend Micro InterScan Web Security and Symantec Scan Engine. You can even use multiple anti virus software with SafeSquid to simultaneously scan in-coming content. This does not cause any significant latency, since SafeSquid has a multi-threaded architecture.

Think of Flow as the BMW of Mac file transfer clients. Smart, strong, and beautiful. Flow supports FTP, SFTP, .Mac, WebDAV, and Local connections. By leveraging the power of today's broadband connections with high-concurrency transfers, astoundingly low between-transfer latency, and a robust editor, Flow delivers unbeatable performance and value in one lean, tight, and beautiful package.

wondershaper is an easy to use traffic shaping script that provides these improvements: * Low latency for interactive traffic (and pings) at all times * Allow websurfing at reasonable speeds while uploading / downloading * Make sure uploads don't hurt downloads * Make sure downloads don't hurt uploads

This guide shows how to install and configure Smokeping on Debian Etch to monitor network latency. From the Smokeping web site: "SmokePing is a deluxe latency measurement tool. It can measure, store and display latency, latency distribution and packet loss. SmokePing uses RRDtool to maintain a longterm data-store and to draw pretty graphs, giving up to the minute information on the state of each network connection."

Manauton is a program used to digitally record sound. Manauton can operate in a manual or autonomous mode, hence the name Manauton. When in manual mode, recording can be paused and unpaused with a key-press or remote control. This is similar to a tape recorder, but with a difference, there is no latency! As a matter of fact, Manauton works with negative latency. This negative latency cancels out the effect of the human latency associated with hearing a sound interpreting it and reacting to the sound. Negative latency is accomplished by buffering the sound in memory prior to recording to disk.

CobWeb is a next-generation content distribution network that can deliver web pages quickly to clients through a peer-to-peer cache. It uses the Beehive replication framework to provide a high performance web hosting service while consuming near-minimal storage and bandwidth at each participating node. CobWeb operates as a ring of cooperative caching proxy servers, each of which is capable of serving any HTTP request. When web objects are requested, they are fetched from their origin servers and inserted into the system. Through an analysis of web object popularity, size, and update rate, CobWeb then computes an optimal replication strategy for each object to provide low lookup latency. CobWeb is available for public use. On the server side, directing HTTP requests from your servers to CobWeb can reduce bandwidth demand on your servers, protect against flash crowds, and help alleviate denial of service attacks. On the client side, directing HTTP requests from your browser through CobWeb will speed up web surfing.