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TheTIOBE programming community index is a measure of popularity of programming languages, created and maintained by TIOBE Software BV, based inEindhoven, theNetherlands.[1] TIOBE stands forThe Importance of Being Earnest, the title of an 1895 comedy play byOscar Wilde, to emphasize the organization's "sincere and professional attitude towards customers, suppliers and colleagues".[2]
The index is calculated from the number ofsearch engine results for queries containing the name of the language.[3] The index covers searches inGoogle, Google Blogs,MSN,Yahoo!,Baidu,Wikipedia andYouTube. The index is updated once a month. The current information is free, but the long-term statistical data is for sale. The index authors have stated that it may be valuable when making various strategic decisions. TIOBE focuses onTuring complete languages, so it does not provide information about the popularity ofHTML or other markup languages such asXML.
TIOBE index is sensitive to the ranking policy of the search engines on which it is based. For instance, in April 2004 Google performed a cleanup action to get rid of unfair attempts to promote the search rank. As a consequence, there was a large drop for languages such asJavascript andC++, yet these languages have stayed at the top of the table. To avoid such fluctuations, TIOBE now uses multiple search engines.
In August 2016,C reached its lowest ratings score since the index was launched, but was still the second most popular language afterJava,[4] while in May 2020, C regained the top,[5] and since then Java has substantially gone down[6] in popularity while still maintaining number two position until November 2020, whenPython overtook Java, taking the number two position.[7] In 2021, Java regained its number two position and in 2022, Python overtook both Java and C to become the most popular programming language.[8]
The TIOBEprogramming language of the year award goes to the language with the biggest annual popularity gain in the index, e.g.,Go was the programming language of the year in 2016,[9] andPython won the award for 2020.
Maintainers specify that the TIOBE index is "not about thebest programming language or the language in whichmost lines of code have been written",[10] but do claim that the number of web pages may reflect the number of skilled engineers, courses and jobs worldwide.
In 2012, Pierre Carbonnelle challenged TIOBE's naming ofObjective-C as the "programming language of the year", arguing that there may be many Objective-C pages on the web, but they are rarely read. It proposes its own PYPL index[11] instead, based on Google Trends data. It shows popularity trends since 2004, worldwide and for five countries.
Tim Bunce, author of thePerl DBI, has been critical of the index and its methods of ranking.[12]
TheRedMonk Programming Language Rankings[13] establishes a ranking based on the number ofGitHub projects and questions asked onStack Overflow.
IEEE Spectrum Top programming languages,[14] which aims to estimate the programming language’s popularity from a variety of data sources and gauged the popularity for a total of eight metrics[15] is another alternative ranking of programming languages. Their popularity ranks estimation is done yearly.