Download E-books High Performance Web Sites: Essential Knowledge for Front-End Engineers PDF

By Steve Souders

Want your site to exhibit extra quick? This booklet provides 14 particular ideas that might reduce 25% to 50% off reaction time while clients request a web page. writer Steve Souders, in his task as leader functionality Yahoo!, accrued those top practices whereas optimizing many of the most-visited pages on the internet. Even websites that had already been hugely optimized, corresponding to Yahoo! seek and the Yahoo! entrance web page, have been capable of take advantage of those unusually easy functionality guidelines.

The principles in High functionality internet Sites clarify how one can optimize the functionality of the Ajax, CSS, JavaScript, Flash, and photographs that you've got already equipped into your website -- changes which are serious for any wealthy net software. different resources of data pay loads of recognition to tuning internet servers, databases, and undefined, however the bulk of demonstrate time is taken up at the browser aspect and by means of the conversation among server and browser. High functionality internet Sites covers each element of that process.

Each functionality rule is supported by way of particular examples, and code snippets can be found at the book's significant other website. the principles contain how to:

  • Make Fewer HTTP Requests
  • Use a content material supply Network
  • Add an Expires Header
  • Gzip Components
  • Put Stylesheets on the Top
  • Put Scripts on the Bottom
  • Avoid CSS Expressions
  • Make JavaScript and CSS External
  • Reduce DNS Lookups
  • Minify JavaScript
  • Avoid Redirects
  • Remove Duplicates Scripts
  • Configure ETags
  • Make Ajax Cacheable

If you are development pages for prime site visitors locations and wish to optimize the adventure of clients traveling your website, this booklet is indispensable.

"If every person might enforce simply 20% of Steve's instructions, the net will be adramatically larger position. among this e-book and Steve's YSlow extension, there is reallyno excuse for having a slow website anymore."

-Joe Hewitt, Developer of Firebug debugger and Mozilla's DOM Inspector

"Steve Souders has performed a beautiful activity of distilling a big, semi-arcane paintings right down to a suite of concise, actionable, pragmatic engineering steps that would switch the realm of internet performance."

-Eric Lawrence, Developer of the Fiddler internet Debugger, Microsoft Corporation

Show description

Read or Download High Performance Web Sites: Essential Knowledge for Front-End Engineers PDF

Similar Management Information Systems books

Design of Industrial Information Systems

Layout of business info platforms provides a physique of information appropriate to many features of commercial and production structures. New software program structures, resembling firm source making plans, and new applied sciences, corresponding to RFID, have made it attainable to combine what have been separate IT databases and operations into one process to gain the best attainable operational efficiencies.

The Basics of Hacking and Penetration Testing, Second Edition: Ethical Hacking and Penetration Testing Made Easy

The fundamentals of Hacking and Penetration checking out, second Ed. serves as an creation to the stairs required to accomplish a penetration try or practice a moral hack from starting to finish. No past hacking event is required. you are going to how to effectively make the most of and interpret the result of modern-day hacking instruments, that are required to accomplish a penetration try.

Information Governance and Security: Protecting and Managing Your Company's Proprietary Information

Details Governance and safeguard indicates managers in any dimension association find out how to create and enforce the rules, tactics and coaching essential to retain their organization’s most crucial asset―its proprietary information―safe from cyber and actual compromise. Many intrusions will be avoided if acceptable precautions are taken, and this booklet establishes the enterprise-level structures and disciplines worthy for dealing with the entire details generated by means of a firm.

Information for Innovation: Managing Change from an Information Perspective

A lot is related in regards to the info age, the knowledge economic system, the knowledge society, and especially approximately info expertise, yet little approximately details itself. right here, Stuart Macdonald unearths info principal to various business/economics disciplines, from patents to excessive expertise, from company technique to business espionage.

Additional info for High Performance Web Sites: Essential Knowledge for Front-End Engineers

Show sample text content

W3. org/Protocols/rfc2616/rfc2616-sec13. html#sec13. three. 4), if either one of those headers are within the request, the beginning server “MUST no longer go back a reaction prestige of 304 (Not changed) except doing so is in line with all the conditional header fields within the request. ” it can truly be larger if the If-NoneMatch header wasn’t even there. That’s the answer mentioned within the subsequent part. * See the “Apache http daemon dossier inode disclosure vulnerability” net article at http://www3. ca. com/ securityadvisor/vulninfo/vuln. aspx? ID=7196 for additional information. ninety two | bankruptcy thirteen: Rule thirteen: Configure ETags ETags: Use ’Em or Lose ’Em when you've got a number of servers web hosting your website and you’re utilizing Apache or IIS with the default ETag configuration, your clients have become slower pages, your servers have the next load, you’re eating larger bandwidth, and proxies aren’t caching your content material successfully. “But wait! ” you assert, “I Rule three and extra a much destiny Expires header to my parts. There shouldn’t be any conditional GET requests. ” no matter if your elements have a miles destiny Expires header, a conditional GET request continues to be made at any time when the person clicks Reload or Refresh. There’s no method round it— the matter with ETags should be addressed. One choice is to configure your ETags to exploit their versatile validation features. One instance could be a script that varies counting on even if the browser is net Explorer. utilizing Hypertext Preprocessor to generate the script, you may set the ETag header to mirror the browser nation: when you have elements that experience to be demonstrated in response to whatever except the last-modified date, ETags are a strong manner of doing that. in the event you don’t have the necessity to customise ETags, you must easily get rid of them. either Apache and IIS have pointed out ETags as a functionality factor, and recommend altering the contents of the Etag (see http://www. apacheweek. com/issues/02-01-18, http://support. microsoft. com/? id=922733, and http://support. microsoft. com/kb/922703 for extra details). Apache types 1. three. 23 and later aid the FileETag directive. With this directive, the inode worth may be faraway from the ETag, leaving dimension and timestamp because the closing elements of the ETag. equally, in IIS you could set the ChangeNumber to be exact throughout all servers, leaving the dossier timestamp because the in simple terms different piece of data within the ETag. Following those feedback leaves an ETag that comprises simply the scale and timestamp (Apache) or simply the timestamp (IIS). notwithstanding, simply because this is often essentially reproduction info, it’s greater to simply eliminate the ETag altogether—the Last-Modified header presents sufficiently identical details, and elimination the ETag reduces the dimensions of the HTTP headers in either the reaction and next requests. The Microsoft help articles referenced during this part describe the way to get rid of ETags. ETags: Use ’Em or Lose ’Em | ninety three In Apache, you could get rid of Etags through easily including the subsequent line for your Apache configuration dossier: FileETag none ETags within the actual global desk 13-1 indicates that 6 out of 10 most sensible U.

Rated 4.59 of 5 – based on 47 votes