Run results for: Validate performance of JWT string validation by decoding vs basic string match

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_2_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.2 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 17

Operating system: iOS 17.2.1

Device Platform: Mobile

Date tested: 2 years ago

Benchmark engine: Benchmark.js

testWithoutDecoding()

7.6M/s

decodeAndTest()

1.8M/s

View exact numbers

Test name	Executions per second
✓ testWithoutDecoding()	7,607,919 Ops/sec
decodeAndTest()	1,839,141 Ops/sec

Script Preparation code:

var token = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiY3VzdG9tZXJfaWQiOiJqb2huZG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.ScbjLEXxqzZQ9JEw5yQu2MLlGsLhHzMlg7aZHZnH4Ro";

function decodeAndTest() {
    return "customer_id" in JSON.parse(atob(token.split(".")[1]));
}

var encodedCustId = "Y3VzdG9tZXJfaWQ=";

function testWithoutDecoding() {
  return token.indexOf(encodedCustId) >= 0;
}

Tests:

decodeAndTest()
decodeAndTest()
testWithoutDecoding()
testWithoutDecoding()