Benchmark: split vs slice - MeasureThat.net

Script Preparation code:

var rgb = "rgba(255,255,255,0.7)";

Tests:

slice
rgb.split("(")[1].slice(0, -1).split(",");
split
rgb.split("(")[1].split(")")[0].split(",")

Historical Performance Data aggregated from 63 community runs

Desktop Results:

Chrome 51 runs

split

11.1M/s

slice

6.3M/s

Fastest: split (1.8x faster)

View exact numbers

✓ split: 11,120,088 ops/sec
• slice: 6,272,784 ops/sec

Firefox 12 runs

slice

5.5M/s

split

4.0M/s

Fastest: slice (1.4x faster)

View exact numbers

✓ slice: 5,482,376 ops/sec
• split: 4,000,243 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
slice
split

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 5 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36

Browser/OS: Chrome 146 on Windows

View result in a separate tab

split

6.7M/s

slice

3.0M/s

View exact numbers

Test name	Executions per second
✓ split	6,738,224 Ops/sec
slice	2,997,285 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the provided JSON data and explain what's being tested.

**What is being tested?**

The benchmark measures the performance difference between two approaches:

1. `split()`: This method returns an array of substrings by splitting a string at a specified separator (in this case, parentheses `(` and `)`).
2. `slice()`: This method extracts a section of a string.

**Options compared:**

Both methods are being tested to determine which one is faster for the specific use case of extracting a color value from an RGB string using the format `rgba(r,g,b,a)`.

**Pros and Cons:**

1. **split():**
	* Pros:
		+ More explicit and readable code
		+ Can be used for more complex parsing tasks
	* Cons:
		+ May be slower due to the overhead of creating an array
2. **slice():**
	* Pros:
		+ Faster execution time (likely due to native implementation)
		+ Can be used for simple string slicing operations
	* Cons:
		+ Less readable code, as it's not immediately clear what's being done

**Library usage:**

None of the provided benchmark scripts use a JavaScript library.

**Special JS feature or syntax:**

The `rgba()` color format is using a special syntax to specify an alpha channel value (0.7 in this case). This syntax is a standard for specifying alpha channels in CSS, but it's also supported by some JavaScript libraries and frameworks.

**Benchmark Preparation Code:**

The script preparation code includes the RGB string `var rgb = "rgba(255,255,255,0.7)"`; which is used as input for both tests.

**Individual test cases:**

There are two test cases:

1. **slice()**
	* Benchmark definition: `rgb.split("(")[1].slice(0, -1).split(",")`
	* Purpose: Extract the color value from the RGB string using slice and split
2. **split()**
	* Benchmark definition: `rgb.split("(")[1].split(")")[0].split(",")`
	* Purpose: Extract the color value from the RGB string using split

**Latest benchmark result:**

The results show that the `slice()` approach is faster than the `split()` approach for this specific test case.

**Other alternatives:**

Some alternative approaches to these methods could be:

1. **Using a regular expression**: Instead of using `split()` or `slice()`, you could use a regular expression to extract the color value from the RGB string.
2. **Using a custom parsing function**: You could write a custom JavaScript function to parse the RGB string and extract the color value, which might be faster than relying on built-in methods like `split()` or `slice()`.
3. **Using a library or framework**: Depending on your specific use case, you might consider using a library or framework that provides optimized parsing functions for RGB strings.

Keep in mind that these alternatives may not necessarily offer significant performance benefits, and the choice of approach will depend on the specific requirements of your project.

split vs slice (version: 0) Benchmark.js

Javascript split vs slice performance

Comparing performance of: `slice vs split`

Created: 5 years ago by: Guest

Go to the latest result

slice

split

Historical Performance Data aggregated from 63 community runs

Desktop Results:

Chrome 51 runs

Firefox 12 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

split vs slice (version: 0) Benchmark.js

Javascript split vs slice performance

Comparing performance of: slice vs split

Created: 5 years ago by: Guest

Go to the latest result

slice

split

Historical Performance Data aggregated from 63 community runs

Desktop Results:

Chrome 51 runs

Firefox 12 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

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Comparing performance of: `slice vs split`