Run results for: Compare GCD

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

Good non-recursion

38.9M/s

Good Recusion

22.3M/s

Bottom Up

15.9M/s

Top Down

14.3M/s

View exact numbers

Test name	Executions per second
✓ Good non-recursion	38,875,168 Ops/sec
Good Recusion	22,250,468 Ops/sec
Bottom Up	15,883,154 Ops/sec
Top Down	14,345,156 Ops/sec

Script Preparation code:

function gcd(a, b){
  var divisor = 2, 
      greatestDivisor = 1;

  if (a < 2 || b < 2)
     return 1;
  
  while(a >= divisor && b >= divisor){
   if(a %divisor == 0 && b% divisor ==0){
      greatestDivisor = divisor;      
    }
   divisor++;
  }
  return greatestDivisor;
}

function gcd1(a,b){
    var divisor = a < b ? a : b;  	
    
    if(a < 2 || b < 2){
        return 1;
    }
    
    while(divisor > 0){
        if(a % divisor === 0 && b % divisor === 0){
            return divisor;
        }
        divisor--;
    }
}

function gcd2(a, b){
    var x;
    
    while(b !== 0){
        x = a % b;
        a = b;
        b = x;
    }
    
    return a;
}

function gcd3(a, b){
    if(b === 0)
        return a;
    return gcd3(b, a % b);
}

Tests:

Bottom Up
gcd(14, 21);
Top Down
gcd1(14, 21);
Good non-recursion
gcd2(14, 21);
Good Recusion
gcd3(14, 21);