Benchmark: reverse number - MeasureThat.net

Tests:

string way
var n = 1234567890987654321; var reversed = num.toString().split('').reverse().join(''); Number(reversed)
math way
var n = 1234567890987654; var len = Math.ceil(Math.log(n+1) / Math.LN10); var result = 0; while(len>0){ result=result*10; result = Math.floor(result+n%10); n=n/10; len -- }

Rendered benchmark preparation results:

Previous results

Test case name	Result
string way
math way

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Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36

Browser/OS: Chrome 68 on Mac OS X 10.12.6

Test name	Executions per second
string way	0.0 Ops/sec
math way	256002.5 Ops/sec

reverse number (version: 0)