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Template string vs array join
(version: 0)
Benchmark.js
Comparing performance of:
Template string slicing vs Array push and join
Created:
6 years ago
by:
Guest
Go to the latest result
Tests:
Template string slicing
const id = '10135533-2332-4012-aada-b36571a05399'; `${id.slice(1, 8)}${id.slice(9, 13)}${id.slice(15, 18)}`
Array push and join
const id = '10135533-2332-4012-aada-b36571a05399'; const timeStampParts = [] const chars = id.split('') let index = 0 for (const char of chars) { if ( (index !== 0 && index < 8) || (index >= 9 && index < 13) || (index >= 15 && index < 18) ) { timeStampParts.push(char) } index += 1 } const timestamp = timeStampParts.join('')
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Template string slicing
Array push and join
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36
Browser/OS:
Chrome 134 on Linux
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=598260" width="100%" height="500px"></iframe>
Template string slicing
49.3M/s
Array push and join
3.4M/s
View exact numbers
Test name
Executions per second
✓
Template string slicing
49,319,032 Ops/sec
Array push and join
3,402,784 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark definition and test cases. **Benchmark Definition** MeasureThat.net is a website where users can create and run JavaScript microbenchmarks. The provided JSON represents the benchmark, which includes: * `Name`: "Template string vs array join" * `Description`: null (empty) * `Script Preparation Code` and `Html Preparation Code`: null (empty) In summary, this benchmark compares two approaches for extracting a specific substring from a larger string: template strings and arrays. **Test Cases** There are two test cases: 1. **Template string slicing** * The benchmark definition is: `${id.slice(1, 8)}${id.slice(9, 13)}${id.slice(15, 18)}` * This code uses the `slice()` method to extract specific parts of the `id` string and concatenates them using template strings. 2. **Array push and join** * The benchmark definition is: `const timeStampParts = [] ... const timestamp = timeStampParts.join('')` * This code creates an array, pushes specific characters into it, and then joins the array into a single string. **Options Compared** The two approaches being compared are: 1. **Template String Slicing**: Using template strings to concatenate substrings. 2. **Array Push and Join**: Creating an array, pushing specific characters into it, and then joining the array into a single string using `join()` method. **Pros and Cons** Here's a brief summary of the pros and cons of each approach: **Template String Slicing** Pros: * Concise and readable code * Less memory allocation required Cons: * May not be as efficient for large strings due to template string creation and concatenation * Requires JavaScript engine support for template strings (available in most modern browsers) **Array Push and Join** Pros: * Can be more efficient for large strings since array allocation is done in batches * Available in older browsers that don't support template strings Cons: * More verbose code * Requires extra memory allocation for the array **Other Considerations** * **Memory Allocation**: Both approaches have different memory allocation patterns, which can impact performance. * **String Interpolation**: Template strings provide a convenient way to insert values into strings, but may incur additional overhead. **Library and Features Used** No specific libraries are mentioned in the benchmark definition. However, some features used include: * `slice()` method for substring extraction * Template strings (available in modern browsers) for string concatenation If test users use special JS features or syntax, it's not explicitly mentioned in this example. **Alternatives** Some alternative approaches to compare in a similar benchmark could be: 1. **Using regular expressions**: Extracting the desired substring using regex patterns. 2. **Using a custom implementation**: Creating a custom function to extract the substring, which might provide better performance or control over the extraction process. 3. **Using a different string manipulation method**: Employing other methods like `substr()` or `substring()` for substring extraction. These alternatives can provide additional insights into the performance of various approaches and help optimize the code.
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