CODEWITHSUNDEEP
javascriptregexweb
Marais Rossouw
Marais Rossouw

Reputation: 957

A-Za-z vs. a-z/i case insensitive

What is considered best practice, and what is the fastest to compute?

[A-Za-z]

vs.

[a-z]/i

Assuming that you don't care about the rest of the regex's case. I'm wanting to know with exactly those 2 regex's which is the fastest. Or does it yield the same outcome under the hood.

Upvotes: 2

Views: 1397

Answers (1)

choz
choz

Reputation: 17888

A quick test on jsperf.com, shows that to search a single string from a-z on a sample string would results that [a-zA-Z] is slightly faster.

Here are the tests that I performed.

Upvotes: 3

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