Apple ha annunciato la release 4 del browser Safari, definito dallo sviluppatore come "il browser più veloce e innovativo al mondo". Safari è attualmente disponibile in due versioni, dedicate al supporto dei Sistemi Operativi Mac OS X e Windows. La versione 4 dell'applicativo di web surfing firmato Apple è stata messa a punto a seguito di una intensa fase di sviluppo che ha incluso il rilascio al pubblico della beta durante lo scorso mese di Febbraio.

Tra le feature introdotte segnaliamo innanzitutto l'engine Nitro, che permette l'esecuzione del codice in JavaScript 4.5 volte più veloce di Safari 3, e il supporto di HTML 5 e degli effetti CSS Avanzati. E inoltre Top Sites, che fornisce una preview dei siti visitati più di frequente, Full History Search, ossia un motore di ricerca potenziato che effettua una scansione delle pagine web, dei titoli e degli URL presenti nella cronologia della navigazione, e Cover Flow, che facilita la navigazione della cronologia e di bookmark.

SAN FRANCISCO - June 8th, 2009 - Apple today released Safari 4, the world’s fastest and most innovative web browser. Available for Mac and Windows PCs and introduced as a beta in February of this year, Safari 4 features the Nitro engine which runs JavaScript up to 4.5 times faster than Safari 3.* Safari 4 makes browsing more intuitive and enjoyable with innovative features, such as Top Sites, Full History Search and Cover Flow, and support for modern web standards like HTML 5 and advanced CSS Effects.

"The successful beta release helped us fine tune Safari 4 into an even better, faster version that customers are going to love", said Philip Schiller, Apple’s senior vice president of Worldwide Product Marketing. "Safari is enjoyed by 70 million users worldwide and with its blazing fast speed, innovative features and support for modern web standards, it’s the best browser on any platform".

Safari 4 is built on the world’s most advanced browser technologies including the new Nitro JavaScript engine that executes JavaScript nearly eight times faster than IE 8 and more than four times faster than Firefox 3. Safari quickly loads HTML web pages more than three times faster than IE 8 and three times faster than Firefox 3.*

Starting with the development of the open source WebKit browser engine, Apple has been leading the industry in defining and implementing innovative web standards. Safari 4 includes HTML 5 support for offline technologies and support for advanced CSS Effects, enabling an entirely new class of web applications that feature rich media, graphics and fonts. Safari 4 is the first browser to pass the Web Standards Project’s Acid3 test, which examines how well a browser adheres to CSS, JavaScript, XML and SVG standards that are specifically designed for dynamic web applications.

Safari 4 includes Top Sites, for an incredible visual preview of frequently visited and favourite pages; Full History Search, to search through titles, web addresses and the complete text of recently viewed pages; and Cover Flow, to easily flip through web history or bookmarks. Other innovative features include Smart Address Fields for automatically completing web addresses from an easy to read list of suggestions; Search Fields, to fine tune searches with recommendations from Google Suggest or a list of recent searches; and Full Page Zoom, for a closer look at any website without degrading the quality of the site’s layout and text.

In Mac OS X Snow Leopard, available later this year, Safari runs as a 64-bit application, boosting the performance of the Nitro JavaScript engine by up to 50 percent.** Snow Leopard makes Safari more resistant to crashes by running plug-ins in a separate process, so even if a plug-in crashes, Safari continues to run and the user simply has to reload the affected page.

Pricing & Availability
Safari 4 is available for both Mac OS X and Windows as a free download at www.apple.com/ie/safari. Safari 4 for Mac OS X requires Mac OS X Leopard v10.5.7 or Mac OS X Tiger v10.4.11 and Security Update 2009-002, a minimum 256MB of memory and is designed to run on any Intel-based Mac or a Mac with a PowerPC G5, G4 or G3 processor and built-in FireWire. Safari 4 for Windows requires Windows XP SP2 or Windows Vista, a minimum 256MB of memory and a system with at least a 500 MHz Intel Pentium processor. Full system requirements and more information on Safari 4 can be found at www.apple.com/ie/safari.

*Performance will vary based on system configuration, network connection and other factors. All testing conducted on an iMac 2.8 GHz Intel Core 2 Duo system running Windows Vista, with 2GB of RAM. JavaScript benchmark based on the SunSpider JavaScript Performance test. HTML benchmark based on VeriTest’s iBench Version 5.0 using default settings.

**Performance will vary based on system configuration, network connection and other factors. Testing conducted by Apple in May 2009 comparing prerelease Mac OS X Snow Leopard v10.6 with shipping Mac OS X Leopard v10.5.7. Testing was conducted on a shipping MacBook 2.0 GHz system and a shipping iMac 2.66 GHz system, both configured with 2GB of RAM. JavaScript benchmarks based on the SunSpider Performance test comparing Safari running in both 32-bit and 64-bit modes.

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