Run results for: Most Significant Digit

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.59 Safari/537.36 OPR/41.0.2353.46

Browser: Opera 41

Operating system: Windows

Device Platform: Other

Date tested: 8 years ago

Test name	Executions per second
String Interpolation	30328.6 Ops/sec
Log based	29351.7 Ops/sec

Script Preparation code:

var randomNumbers = [0, 1, 632]

Tests:

String Interpolation
for(var n of randomNumbers){ console.log((""+n)[0]) }
Log based
for(var n of randomNumbers){ console.log(n / (10 ** Math.floor(Math.log10(n)))); }