Google data centers in late 2013 and began selling off the barges in 2014. Most of the software stack that Google uses on their servers was developed in-house. According to a well-known Google employee, C++, Java, Python and (more recently) Go are favored over other programming languages. For example, the back end of Gmail is written in Java and the back end of Google Search is written in C++. Google has acknowledged that Python has played an important role from the beginning, and that it continues to do so as the system grows and evolves. The software that runs the Google infrastructure includes:
YouTube Instant hour." Aboukhadijeh lost the bet, for it took him three hours to complete the site, and another couple hours to polish it. Aboukhadijeh said he found it "surprisingly easy to build". Aboukhadijeh built the site by using the YouTube API. He scraped YouTube search suggestions because Google blocked his server for making far too many repeated requests to the search suggestion endpoint. Aboukhadijeh had to re-write the site to instead query YouTube directly for search suggestions, "eliminating the round-trip to [his] server", in order to address the problem. The YouTube Instant interface, which looks similar to the YouTube front page