Benchmark: test vs match vs startsWith vs [0] vs includes vs search

Tests:

test
/@.*/.test("@MyVariable")
match
"@MyVariable".match(/@.*/)
startsWith
"@MyVariable".startsWith("@")
array 0
"@MyVariable"[0] === "@"
includes
"@MyVariable".includes("@")
search
"@MyVariable".search(/@.*/)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
test
match
startsWith
array 0
includes
search

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one month ago):

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**Benchmark Definition**

The benchmark definition is a JSON object that specifies the test case to be executed. In this case, we have six different test cases:

1. `test`: Tests the performance of a simple string comparison.
2. `match`: Tests the performance of the `String.match()` method.
3. `startsWith`: Tests the performance of the `String.startsWith()` method.
4. `array 0`: Tests the performance of accessing the first element of an array using bracket notation (`[]`).
5. `includes`: Tests the performance of the `String.includes()` method.
6. `search`: Tests the performance of the `String.search()` method.

**Options Compared**

The six test cases are compared in terms of their performance, which is measured by the number of executions per second (ExecutionsPerSecond) on a specific device platform (Desktop, Mac OS X 10.15.7). The options being compared are:

* `test`: A simple string comparison using the `===` operator.
* `match`: Uses the `String.match()` method to search for a pattern in a string.
* `startsWith`: Uses the `String.startsWith()` method to check if a string starts with a specific prefix.
* `array 0`: Accesses the first element of an array using bracket notation (`[]`).
* `includes`: Uses the `String.includes()` method to check if a string includes a specific substring.
* `search`: Uses the `String.search()` method to find the index of a specific substring in a string.

**Pros and Cons**

Here's a brief summary of the pros and cons of each approach:

1. `test`:
	* Pros: Simple, fast, and widely supported.
	* Cons: May not be suitable for strings with complex patterns or regular expressions.
2. `match`:
	* Pros: Can handle complex patterns and regular expressions.
	* Cons: Slower than simple string comparisons, especially for short strings.
3. `startsWith`:
	* Pros: Fast and efficient for prefix matching.
	* Cons: May not be suitable for more complex pattern matching.
4. `array 0`:
	* Pros: Fast and efficient for accessing array elements using bracket notation.
	* Cons: Limited to accessing the first element of an array, which may not be sufficient in all cases.
5. `includes`:
	* Pros: Can handle substring matching with a reasonable level of complexity.
	* Cons: Slower than simple string comparisons or prefix matching.
6. `search`:
	* Pros: Can handle complex pattern matching and regular expressions.
	* Cons: Slowest among the six options, especially for short strings.

**Libraries Used**

In this benchmark, no specific libraries are used beyond the standard JavaScript functionality. However, it's worth noting that some browsers may have additional built-in functions or APIs that could be used to implement these tests, such as `RegExp` for regular expression matching.

**Special JS Features or Syntax**

No special JavaScript features or syntax are mentioned in this benchmark. The tests only use basic JavaScript constructs and operators.

**Alternatives**

If you're looking for alternatives to MeasureThat.net, here are a few options:

1. JSHint: A popular linter that also provides performance benchmarks for various JavaScript features.
2. jsperf: A web-based tool for comparing the performance of different JavaScript code snippets.
3. Benchmark.js: A lightweight library for measuring the performance of JavaScript functions and expressions.
4. V8 Profiler: A browser-specific profiling tool that allows you to analyze the execution time of JavaScript code.

I hope this explanation helps! Let me know if you have any further questions.

Latest run results:

Run details: (Test run date: 3 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Browser/OS: Chrome 124 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
test	41749320.0 Ops/sec
match	30162902.0 Ops/sec
startsWith	167858768.0 Ops/sec
array 0	167836208.0 Ops/sec
includes	172428640.0 Ops/sec
search	35467656.0 Ops/sec

Related benchmarks:

test vs match vs startsWith vs [0] vs includes vs search (version: 0)

Comparing performance of: test vs match vs startsWith vs array 0 vs includes vs search

Created: 3 months ago by: Guest

Jump to the latest result

test

match

startsWith

array 0

includes

search

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one month ago):