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String Concat vs JSON.stringify bulk
(version: 0)
Benchmark.js
String Concat vs JSON.stringify
Comparing performance of:
JSON.stringify vs String concat
Created:
3 years ago
by:
Guest
Go to the latest result
Script Preparation code:
var availableSizes = []; for(var i=0;i<10000;i++){ availableSizes.push({label: i, system: i}); }
Tests:
JSON.stringify
var output=[]; output = JSON.stringify(availableSizes);
String concat
var output=[], SUPER_DELIM = ' }~\t|{ '; for(var i=0, len=availableSizes.length; i<len; i++){ output.push(availableSizes[i].label + SUPER_DELIM + availableSizes[i].system); }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
JSON.stringify
String concat
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36
Browser/OS:
Chrome 135 on Mac OS X 10.15.7
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<iframe src="https://measurethat.net/Embed?id=599765" width="100%" height="500px"></iframe>
String concat
4K/s
JSON.stringify
2K/s
View exact numbers
Test name
Executions per second
✓
String concat
4,264 Ops/sec
JSON.stringify
2,185 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what's being tested, compared, and the pros/cons of different approaches. **Benchmark Overview** The benchmark compares two ways to concatenate strings in JavaScript: `JSON.stringify` and string concatenation using a delimiter (`SUPER_DELIM`). The goal is to determine which approach is faster. **Available Sizes** In the provided JSON, we have a script preparation code that creates an array `availableSizes` with 10,000 elements. Each element has two properties: `label` and `system`. This array will be used as input for both test cases. **Test Cases** There are two test cases: 1. **JSON.stringify**: The benchmark definition is `var output=[]; output = JSON.stringify(availableSizes);`. This test case uses the `JSON.stringify()` method to concatenate the elements of the `availableSizes` array into a single string. 2. **String Concat**: The benchmark definition is `var output=[], SUPER_DELIM = ' }~\\t|{ '; for (var i=0, len=availableSizes.length; i<len; i++) { output.push(availableSizes[i].label + SUPER_DELIM + availableSizes[i].system); }`. This test case uses a delimiter (`SUPER_DELIM`) to concatenate the elements of the `availableSizes` array into a single string. **Pros and Cons** **JSON.stringify()** Pros: * Easy to implement: No need to manually concatenate strings. * Can be faster for small arrays, as it's optimized for serialization. Cons: * May not perform well for large arrays due to its internal string creation overhead. * Can be slower than manual concatenation in some cases. **String Concat** Pros: * Typically faster than `JSON.stringify()` for large arrays, as it avoids the internal string creation overhead. * More control over the resulting string, as the delimiter can be customized. Cons: * Requires manual management of the delimiter and string concatenation. * Can lead to performance issues if not implemented correctly (e.g., using too many concatenations). **Other Considerations** * **Browser differences**: The benchmark results are specific to Chrome 124 on Windows. Other browsers may have different performance characteristics, so it's essential to consider cross-browser testing. * **Array size**: The benchmark uses a relatively small array size of 10,000 elements. Larger arrays may require more significant optimization and consideration of the trade-offs between `JSON.stringify()` and string concatenation. **Library** In this case, there is no specific JavaScript library being used. However, some browsers have built-in optimizations or polyfills for `JSON.stringify()` that might affect performance. **Special JS Feature/Syntax** There are no special features or syntax in this benchmark. Both test cases use standard JavaScript methods and constructs. **Alternatives** Other alternatives to consider when concatenating strings in JavaScript include: * Using a library like Lodash's `join()` function, which provides an efficient way to concatenate arrays. * Utilizing modern JavaScript features like template literals (e.g., `template literals` ) for string interpolation. * Leveraging browser-specific optimizations or APIs for array manipulation. In conclusion, the benchmark highlights the importance of considering performance trade-offs when choosing between `JSON.stringify()` and string concatenation in JavaScript. The pros and cons of each approach vary depending on the specific use case, such as array size and desired outcome.
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