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Website

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Technical aspects This section's factual accuracy may be compromised due to out-of-date information . The reason given is: Facebook no longer uses HipHop for PHP. Please update this article to reflect recent events or newly available information. ( August 2020 ) The website's primary color is blue as Zuckerberg is red–green colorblind, a realization that occurred after a test undertaken around 2007. Facebook is built in PHP, compiled with HipHop for PHP, a "source code transformer" built by Facebook engineers that turns PHP into C++. The deployment of HipHop reportedly reduced average CPU consumption on Facebook servers by 50%. 2012 architecture Facebook is developed as one monolithic application. According to an interview in 2012 with Facebook build engineer Chuck Rossi, Facebook compiles into a 1.5 GB binary blob which is then distributed to the servers using a custom BitTorrent-based release system. Rossi stated that it takes about 15 minutes to build and 15 minu...
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Impact

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Scope A commentator in The Washington Post noted that Facebook constitutes a "massive depository of information that documents both our reactions to events and our evolving customs with a scope and immediacy of which earlier historians could only dream". Especially for anthropologists, social researchers, and social historians—and subject to proper preservation and curation—the website "will preserve images of our lives that are vastly crisper and more nuanced than any ancestry record in existence". Economy Economists have noted that Facebook offers many non-rivalrous services that benefit as many users as are interested without forcing users to compete with each other. By contrast, most goods are available to a limited number of users. E.g., if one user buys a phone, no other user can buy that phone. Three areas add the most economic impact: platform competition, the market place and user behavior data. Facebook began to reduce its carbon impact after Greenpeace a...
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Criticisms and controversies

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Facebook's importance and scale has led to criticisms in many domains. Issues include Internet privacy, excessive retention of user information, its facial recognition software, its addictive quality and its role in the workplace, including employer access to employee accounts. Facebook is alleged to have psychological effects, including feelings of jealousy and stress, a lack of attention and social media addiction. European antitrust regulator Margrethe Vestager stated that Facebook's terms of service relating to private data were "unbalanced". Facebook has been criticized for electricity usage, tax avoidance, real-name user requirement policies, censorship and its involvement in the United States PRISM surveillance program. Facebook has been criticized for allowing users to publish illegal and/or offensive material. Specifics include copyright and intellectual property infringement, hate speech, incitement of rape and terrorism, fake news, and crimes, murders, and ...
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