Benchmark: hostname - MeasureThat.net

Script Preparation code:

var host1 = "www.google.com";
var host2 = "www.google.co.uk";
var host3 = "google.com";

Tests:

orig1
var hostname = host1.match(/^(?:www\.)?([^.]+)/)[1];
orig2
var hostname = host2.match(/^(?:www\.)?([^.]+)/)[1];
orig3
var hostname = host3.match(/^(?:www\.)?([^.]+)/)[1];
new1
var hostname = host1.match(/([^.]+)(?:\.co)?\.[^.]+$/)[1];
new2
var hostname = host2.match(/([^.]+)(?:\.co)?\.[^.]+$/)[1];
new3
var hostname = host3.match(/([^.]+)(?:\.co)?\.[^.]+$/)[1];

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
orig1
orig2
orig3
new1
new2
new3

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 7 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/602.4.8 (KHTML, like Gecko) Version/10.0.3 Safari/602.4.8

Browser/OS: Safari 10 on Mac OS X 10.12.3

View result in a separate tab

Test name	Executions per second
orig1	4139609.0 Ops/sec
orig2	4166667.0 Ops/sec
orig3	4120792.0 Ops/sec
new1	3077707.0 Ops/sec
new2	3095862.0 Ops/sec
new3	4425362.0 Ops/sec