Benchmark: re lookaround - MeasureThat.net

Script Preparation code:

var re1 = /^(\d{0,9}(,?(?<=,)\d{0,2})?)(-?(?<=-)(\d{0,9}(,?(?<=,)\d{0,2})?))?$/;
var re2 = /^(\d{0,9}(,\d{0,2})?)(-(\d{0,9}(,\d{0,2})?))?$/;
var re3 = /^((?=(\d{0,9}))\2(,\d{0,2})?)(-((?=(\d{0,9}))\6(,\d{0,2})?))?$/;

Tests:

lookbehind
re1.test('25500,33-33090,770');
normal
re2.test('25500,33-33090,770');
lookforward
re1.test('25500,33-33090,770');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lookbehind
normal
lookforward

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.36

Browser/OS: Chrome 92 on Windows

View result in a separate tab

Test name	Executions per second
lookbehind	1996273.0 Ops/sec
normal	3227098.0 Ops/sec
lookforward	2125050.0 Ops/sec

re lookaround (version: 1)

Comparing performance of: lookbehind vs normal vs lookforward

Created: 2 years ago by: Registered User

Jump to the latest result

lookbehind

normal

lookforward

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A