var string = "Hello world!";
var regex = /Hello1/i;
regex.test(string);
string.toLowerCase().includes("Hello1");
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
RegEx.test | |
String.includes |
Test name | Executions per second |
---|---|
RegEx.test | 12401485.0 Ops/sec |
String.includes | 11308207.0 Ops/sec |
Let's break down the provided benchmark and explain what's being tested.
Benchmark Overview
The benchmark compares two approaches for case-insensitive regular expression matching: regex.test()
and string.toLowerCase().includes()
. The goal is to determine which approach is faster, especially when a string does not match the regex pattern.
Test Cases
There are two test cases:
/Hello1/i
) to search for a substring ("Hello1"
) in a given string ("Hello world!"
). The /i
flag makes the matching case-insensitive.string.toLowerCase()
and then checks if the lowercase version of the regex pattern ("Hello1"
) is included in the original string.Options Compared
The two approaches are compared in terms of performance (executions per second).
includes()
method on a string that has been converted to lowercase. The includes()
method is a more general-purpose string searching function.Pros and Cons
Here's a brief analysis of each approach:
Library
In this benchmark, regex
is a built-in JavaScript object that provides methods for working with regular expressions. The String.includes()
method is also a built-in JavaScript method for checking if a substring exists within another string.
Special JS Feature/Syntax
There are no special JavaScript features or syntax used in this benchmark. However, it's worth noting that the /i
flag in the RegEx pattern enables case-insensitive matching.
Other Alternatives
Other approaches to regular expression matching or string searching might include:
regex-escape
or regex-utils
Keep in mind that these alternatives may not be relevant to the specific use case of this benchmark.