Benchmark Testing of JavaScript indexOf and StartsWith when both can work

web3_indexof_starts_with.js

 function performanceTest(testFunction, iterations) {
  const start = process.hrtime.bigint();
  for (let i = 0; i < iterations; i++) {
    testFunction();
  }
  
  const end = process.hrtime.bigint();
  const time = end - start;
  console.log(`Benchmark took ${time} nanoseconds`);
  return time;
}

const string = "0xf85d8512f9a6fc3c7fcd1690980b7ca6e12884c1b81aafd0f4ff342e5cbe2110534535353534535353535443"

function testStartsWith() {
  string.startsWith("0x")  
}

function testIndexOf() {
  string.indexOf("0x") == 0
}

const iterations = 10000

console.log("Testing startsWith:::")
performanceTest(testStartsWith, iterations)
console.log("Completed startsWith.\n\n")

console.log("Testing indexOf:::")
performanceTest(testIndexOf, iterations)
console.log("Completed indexOf.\n\n")