Benchmark: Изменение строки

Script Preparation code:

var str = "014b6832";
var sstr = "125g4371"
// var por = 1;
var nstr = "";

Tests:

slice
nstr = str.slice(0, 3)+sstr[3]+str.slice(4); nstr = "";
substring
nstr = str.substring(0, 3)+sstr[3]+str.substring(4); nstr = "";
replace
nstr = str.replace("b", sstr[3]); nstr = "";
substr
nstr = str.substr(0, 3)+sstr[3]+str.substr(4); nstr = "";

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
slice
substring
replace
substr

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark is designed to measure the performance of different string manipulation methods in JavaScript: `slice`, `substring`, `replace`, and `substr`. The test case uses a specific string (`str`) with a fixed length, and each method is applied to it in a specific way.

**Script Preparation Code**

The script preparation code sets up the variables:
```javascript
var str = "014b6832";
var sstr = "125g4371";
// var por = 1;
var nstr = "";
```
The variable `por` (line comment) is commented out, suggesting it might be an optional parameter or a test case variation.

**Html Preparation Code**

There is no HTML preparation code provided, which suggests that the benchmark only tests JavaScript code and does not rely on HTML-specific features.

**Individual Test Cases**

Each test case defines a specific benchmarking scenario:

1. **slice**: `nstr = str.slice(0, 3)+sstr[3]+str.slice(4); nstr = "";`
2. **substring**: `nstr = str.substring(0, 3)+sstr[3]+str.substring(4); nstr = "";`
3. **replace**: `nstr = str.replace("b", sstr[3]); nstr = "";`
4. **substr**: `nstr = str.substr(0, 3)+sstr[3]+str.substr(4); nstr = "";`

**Library and Special JS Features**

There are no libraries mentioned in the benchmark definition or test cases.

However, some special JavaScript features might be used:

* `slice`, `substring`, and `substr` methods are native string methods.
* The `replace()` method uses a regular expression pattern (`"b"`).
* The ` exec()` function is not explicitly called; instead, the `replace()` method returns the modified string.

**Pros and Cons of Different Approaches**

Here's a brief overview of each approach:

1. **slice**: This method creates a new string by extracting a subset of characters from the original string. It's generally faster than `substring` because it avoids creating an intermediate string.
	* Pros: fast, efficient
	* Cons: might create a temporary object on the heap
2. **substring**: This method also extracts a subset of characters from the original string but creates an intermediate string as part of the process.
	* Pros: easy to understand, works for most use cases
	* Cons: slower than `slice`, potentially inefficient due to intermediate object creation
3. **replace**: This method uses regular expressions and might be slower than the other methods because it involves additional processing steps.
	* Pros: flexible, can handle more complex patterns
	* Cons: might be slower, requires careful handling of special cases (e.g., backreferences)
4. **substr**: Similar to `slice`, this method creates a new string by extracting a subset of characters from the original string.
	* Pros: similar performance profile to `slice`
	* Cons: slightly less efficient due to a different implementation

**Other Alternatives**

Some alternative methods for string manipulation might include:

* Using native Web APIs (e.g., `TextDecoder`, `TextEncoder`) for encoding and decoding strings
* Leveraging specialized libraries or frameworks for advanced string processing tasks (e.g., regular expressions, text analysis)
* Employing custom algorithms or data structures (e.g., suffix trees, trie-based searching)

However, these alternatives are not represented in this specific benchmark.

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:83.0) Gecko/20100101 Firefox/83.0

Browser/OS: Firefox 83 on Windows

View result in a separate tab

Test name	Executions per second
slice	24073188.0 Ops/sec
substring	25266880.0 Ops/sec
replace	10628421.0 Ops/sec
substr	24888354.0 Ops/sec

Related benchmarks:

Изменение строки (version: 0)

Comparing performance of: slice vs substring vs replace vs substr

Created: 5 years ago by: Registered User

Jump to the latest result

slice

substring

replace

substr

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):