Presto

Presto
開發者Opera Software ASA
当前版本2.12.423（2015年3月16日，​9年前​（2015-03-16）[1]）
编程语言C++[2]
操作系统跨平台
类型應用程式框架（英语：Application framework）／軟體元件
许可协议專有
网站dev.opera.com

Presto是一個由Opera Software開發的網頁瀏覽器排版引擎，由Opera 7.0至12.18版本所使用。

Presto取代了舊版Opera 4至6版本使用的Elektra排版引擎，包括加入動態功能，例如網頁或其部分可隨著DOM及Script語法的事件而重新排版。Presto在推出後不斷有更新版本推出，使不少錯誤得以修正，以及閱讀JavaScript效能得以最佳化。

2013年2月12日，Opera宣佈將結束Presto引擎的開發，未來將以Webkit引擎為主[3]。

2016年2月15日，传出Opera被收购的消息，同日Presto内核版Opera更新到12.18。

JavaScript引擎

Opera的Pre-Presto版本使用了Linear A引擎。以Presto的Core fork為基礎，Opera 7.0至9.27的Opera版本使用了Linear B引擎[4]。Futhark引擎使用在Presto的Core 2 fork的一些版本，即Opera 9.5至10.10版本。在當時，Futhark是世界上最快的引擎，但在2008年，新一代JavaScript引擎如Google（V8）、Mozilla（TraceMonkey）及Apple（SquirrelFish）已領先一步，加入了機器語言生成。這開闢了在客戶端進行大量計算的可能性，Futhark雖然依舊快速和高效，但仍然無法企及。

2009年2月5日，Opera推出了Carakan引擎，擁有基於暫存器的位元組碼，機器語言生成，自動對象分類及整體性能改進[5][6]。

以Presto為基礎的應用程式

網路瀏覽器

HTML編輯器

原始碼洩漏

12.15版本的原始碼被洩漏到GitHub[14][15][16][17][18][19]。2017年1月14日，在數位千禧年著作權法的要求下被刪除[20]。2017年1月18日，Opera軟體公司已經確認了原始碼的真實性[21]。

参考资料

  1. ^ Dev.Opera — Opera Mini server upgrade. dev.opera.com. [2015-12-28]. （原始内容存档于2016-01-27）. 
  2. ^ Lextrait, Vincent. The Programming Languages Beacon, v10.0. 2010-01 [2010-01-04]. （原始内容存档于2012-05-30）. 
  3. ^ 300 million users and move to WebKit. Opera Software. 2013-02-12 [2013-02-14]. （原始内容存档于2013-02-14）. 
  4. ^ Sivonen, Henri. Names of Browser Engines. 2006-11-23 [2007-01-03]. （原始内容存档于2011-08-26）. 
  5. ^ Lindström, Jens. Carakan - By Opera Core Concerns. Opera Software. 2009-02-05 [2009-02-05]. （原始内容存档于2009-02-06）. 
  6. ^ Lindström, Jens. Carakan Revisited - By Opera Core Concerns. Opera Software. 2009-12-22 [2009-12-26]. （原始内容存档于2009-12-25）. 
  7. ^ Surf in Bed: Nintendo DS Browser hits Japan (新闻稿). Opera Software ASA. 2006-07-24 [2008-11-02]. （原始内容存档于2006-08-14）. 
  8. ^ Operating Systems are Less Important: Opera. Techtree. 2008-10-08 [2009-02-25]. （原始内容存档于2008-10-12）. 
  9. ^ Play with the Web: Opera browser now available for download on Wii (新闻稿). Opera Software ASA. 2006-12-22 [2008-11-02]. （原始内容存档于2008-05-12）. 
  10. ^ Sony Electronics uses the Opera browser for its new mylo personal communicator (新闻稿). Opera Software ASA. 2006-08-23 [2008-11-02]. （原始内容存档于2008-08-29）. 
  11. ^ Powered by Opera: Opera Integrated with Adobe Creative Suite 2 (新闻稿). Opera Software ASA. 2005-04-04 [2008-11-02]. [永久失效連結]
  12. ^ Adobe Creative Suite 3 (CS3)uses built-in Opera for rendering engine. 2007-03-28 [2008-04-20]. （原始内容存档于2008-03-03）. 
  13. ^ Design Web Pages for the Desktop and Mobile Devices (新闻稿). Virtual Mechanics Inc. 2008-11-18 [2008-11-18]. （原始内容存档于2009-01-09）. 
  14. ^ Presto Web rendering engine: Opera 12.15. GitHub. 2017-01-12. （原始内容存档于2017-01-13） （英语）. 
  15. ^ Opera Presto source code leaked • r/operabrowser. reddit. [2017-10-12]. （原始内容存档于2019-02-17） （英语）. 
  16. ^ Full source code of Opera Presto has been leaked • r/technology. reddit. [2017-10-12]. （原始内容存档于2019-02-17） （英语）. 
  17. ^ Presto engine source code available on GitHub • r/operabrowser. reddit. [2017-10-12]. （原始内容存档于2018-11-22） （英语）. 
  18. ^ Opera Presto Source Code Leaks Online. Bleeping Computer. [2017-10-12]. （原始内容存档于2017-03-29） （美国英语）. 
  19. ^ На GitHub появился странный репозиторий, похожий на исходники движка Opera Presto [закрыто правообладателями]. GeekTimes. [2017-10-12]. （原始内容存档于2017-10-13） （俄语）. 
  20. ^ 2017-01-12-Presto.md. GitHub. [2017-10-12]. （原始内容存档于2017-04-12）. 
  21. ^ Legacy Opera Presto source code appearance in online sharing sites - Opera Security. Opera Security. 2017-01-18 [2017-10-12]. （原始内容存档于2017-10-13） （美国英语）. 

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