It is a recognized word, at least by the Cambridge [0], Oxford [1], and Wiktionary [2] dictionaries. [0] https://dictionary.cambridge.org/dictionary/english/pe

It is a recognized word, at least by the Cambridge [0], Oxford [1], and Wiktionary [2] dictionaries. [0] https://dictionary.cambridge.org/dictionary/english/performant https://dictionary.cambridge.org/dictionary/english/performa... [1] https://en.oxforddictionaries.com/definition/performant https://en.oxforddictionaries.com/definition/performant [2] https://en.wiktionary.org/wiki/performant https://en.wiktionary.org/wiki/performant