
Final or stable version of Opera 43 based on Chromium 56 has been released for Windows, Mac and Linux platforms and available for download from Opera website. The new version promises even faster page loading when compared with previous version, thanks to Instant Page loading and Profile Guided Optimization (PGO).
As we’ve told when Opera version 43 was in developer stream version that speculative prerenderer in address bar makes it possible to load pages in the background by predicting what you’re going to type in the address bar.
Krystian Kolondra. EVP Desktop @ Opera says in a blog post about how instant page loading works: ” Instant page loading is a technology that predicts which website you’re typing the address for. Once recognized, it begins loading the site in the background even before you hit enter.”
“Instant page loading becomes smarter over time by learning which URL inputs led to a specific website.” He added.

You can check how prerender is doing by visiting these pages
opera://predictors
opera://net-internals/#prerender
To know whether prerender is enabled or disabled in opera browser, visit Prerender test page.
Disabling prerender
You can turn off the feature by unchecking “Predict network actions to improve page load performance” in the Settings.
Another feature that has made to this version is Profile Guided Optimization. Opera software claims ” PGO optimizes the most important parts of the browser, and brings some significant speed improvements. With this technology, (Opera) startup is 13% faster*”.
Copying text in a link is now easy with a classic link selection feature.
For more information, head over to opera blog.