Editing Presto (browser engine) (section)

{{Short description|Defunct browser engine}}
{{Infobox software
| name = Presto
| logo = Presto.svg
| logo size = 64px
| screenshot = 
| caption = 
| developer = [[Opera Software]] [[Allmennaksjeselskap|ASA]]
| latest release version = 2.12.423
| latest release date = {{Start date and age|2015|03|16|df=yes}}<ref>{{Cite web|title = Dev.Opera — Opera Mini server upgrade|url = https://dev.opera.com/blog/opera-mini-server-upgrade|website = dev.opera.com|access-date = 2015-12-28}}</ref>
| latest preview version = 
| latest preview date = 
| programming language = [[C++]]<ref>{{cite web |url= http://www.lextrait.com/Vincent/implementations.html |title= The Programming Languages Beacon, v10.0 |first= Vincent |last= Lextrait |date= January 2010 |access-date= 4 January 2010 |archive-url= https://archive.today/20120530/http://www.lextrait.com/Vincent/implementations.html |archive-date= 30 May 2012 |url-status= dead }}</ref>
| operating system = [[Linux]] ([[non-free software|non-free]] repositories) and [[Microsoft Windows|Windows]]
| genre = [[Application framework]], [[Browser engine]]
| license = [[proprietary software|Proprietary]]
| website = {{URL|dev.opera.com}}
}}
'''Presto''' was the [[browser engine]] of the [[Opera (web browser)|Opera web browser]] from the release of Opera 7 on 28 January 2003, until the release of Opera 15 on 2 July 2013, at which time Opera switched to using the [[Blink (browser engine)|Blink]] engine that was originally created for [[Chromium (web browser)|Chromium]].<ref>{{cite web
|url=https://dev.opera.com/blog/300-million-users-and-move-to-webkit/
|title=300 million users and move to WebKit
|last=Lawson
|first=Bruce
|publisher=[[Opera Software]]
|date=2013-02-12
|access-date=2013-02-13}}</ref> Presto was also used to power the [[Opera Mini]] and [[Opera Mobile]] browsers.

Presto is a dynamic engine. [[Web page]]s can be re-rendered completely or partially in response to [[DOM events]]. Its releases saw a number of [[Patch (computing)|bug fixes]] and optimizations to improve the speed of the [[ECMAScript]] ([[JavaScript]]) engine. It is [[Proprietary software| proprietary]] and only available as a part of the Opera browsers.