Run results for: Regexp Greedy vs lazy cost

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.105 Safari/537.36

Browser: Chrome 104

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Lazy & good string	2184643.8 Ops/sec
Lazy & bad string	2112676.5 Ops/sec
Greedy & good string	1999450.4 Ops/sec
Greedy & bad string	1972240.9 Ops/sec

Script Preparation code:

str = 'Crew across the rivers'
badStr = 'A crew boards the ship'
searchFor = [...'chris']
lazyRE = RegExp(searchFor.join('.*?'), 'i')
greedyRE = RegExp(searchFor.join('.*'), 'i')

Tests:

Lazy & good string
lazyRE.test(str)
Lazy & bad string
lazyRE.test(badStr)
Greedy & good string
greedyRE.test(str)
Greedy & bad string
greedyRE.test(badStr)

Run results for: Regexp Greedy vs lazy cost

Lazy & good string

Lazy & bad string

Greedy & good string

Greedy & bad string