Ways of counting digits

Benchmark created by Jim on

Description

Not only is the log way of doing this slower, it'll break down on high numbers due to precision issues.

Test runner

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Testing in
TestOps/sec
Math.floor(Math.log(n)/Math.log(10)) + 1
function countDigits(n) {
  return Math.floor(Math.log(n)/Math.log(10)) + 1;
}

countDigits(1);
countDigits(9);
countDigits(10);
countDigits(11);
countDigits(99);
countDigits(100);
countDigits(101);
countDigits(999);
countDigits(1000);
countDigits(1001);
countDigits(9999);
countDigits(10000);
countDigits(10001);

 
ready
n.toString().length
function countDigits(n) {
  return n.toString().length;
}

countDigits(1);
countDigits(9);
countDigits(10);
countDigits(11);
countDigits(99);
countDigits(100);
countDigits(101);
countDigits(999);
countDigits(1000);
countDigits(1001);
countDigits(9999);
countDigits(10000);
countDigits(10001);
 
ready

Revisions

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