From Longman Dictionary of Contemporary Englishin the blink of an eyein the blink of an eyeFAST/QUICKvery quickly → blink
Examples from the Corpus
in the blink of an eye• A full volley will rip through the toughest regiment causing immense casualties in the blink of an eye.• I had read somewhere that all the greatest discoveries had been made in the blink of an eye.• He went from frozen stillness to liquid and menacing movement in the blink of an eye.• It was the uncertainty, the thought that all my happiness could be smashed in the blink of an eye.• He would be up and after them in the blink of an eye.• How often does it lose a week's work in the blink of an eye? 