Benchmark: Regexp test for safari

Script Preparation code:

var REGEXP = /^((['])((?:\\.|[^'])+?)(')|(['])(.*)(')|(["])((?:\\.|[^"])+?)(")|([`])((?:\\.|[^`])+?)(`))/;
var CTOR_REGEXP = new RegExp(REGEXP);
var TEST_STRING = `""" select 1; """"; '''select 2; ''', ""select 3;""`;

Tests:

string match REGEXP
TEST_STRING.match(REGEXP)
string match REGEXP CTOR
TEST_STRING.match(CTOR_REGEXP)
regex exec REGEXP
REGEXP.exec(TEST_STRING)
regex exec REGEXP CTOR
CTOR_REGEXP.exec(TEST_STRING)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
string match REGEXP
string match REGEXP CTOR
regex exec REGEXP
regex exec REGEXP CTOR

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36

Browser/OS: Chrome 95 on Linux

View result in a separate tab

Test name	Executions per second
string match REGEXP	5492421.0 Ops/sec
string match REGEXP CTOR	5135194.0 Ops/sec
regex exec REGEXP	4484323.0 Ops/sec
regex exec REGEXP CTOR	4751277.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and its options.

**Benchmark Definition JSON**

The `Script Preparation Code` section defines two regular expressions: `REGEXP` and `CTOR_REGEXP`. `REGEXP` is used for string matching, while `CTOR_REGEXP` is a variant of `REGEXP` created using the `RegExp` constructor. The purpose of this benchmark is to test the performance of these two approaches.

**Options Compared**

The benchmark compares the following options:

1. **String Matching**: Using the `match()` method on the regular expression.
2. **Constructor-based String Matching**: Creating a new instance of the regular expression using the `RegExp` constructor and then calling its `exec()` method.
3. **String Executable**: Using the `exec()` method directly on the regular expression.

**Pros and Cons**

1. **String Matching (match())**:
	* Pros: Simple, widely supported, and generally fast.
	* Cons: May be slower than other approaches for very large input strings or complex patterns.
2. **Constructor-based String Matching (CTOR_REGEXP)**:
	* Pros: Can be faster than string matching for some cases, as it avoids the overhead of method calls.
	* Cons: Requires creating a new instance of the regular expression, which can be slower for small inputs.
3. **String Executable**:
	* Pros: Simple and fast for executing a single test case.
	* Cons: Limited to a single test case per execution, which may not be suitable for more complex tests.

**Library**

The `RegExp` constructor is used to create the regular expression instances. The `RegExp` object provides an efficient way to work with regular expressions in JavaScript.

**Special JS Feature/Syntax**

This benchmark does not utilize any special JavaScript features or syntax beyond regular expressions. However, it's worth noting that modern JavaScript engines have implemented various performance optimizations and features for regular expressions, such as just-in-time (JIT) compilation and caching.

**Alternative Approaches**

Other approaches to testing regular expression performance might include:

1. **Using a different JavaScript engine**: Testing the same benchmark on multiple JavaScript engines (e.g., Chrome, Firefox, Node.js) can provide insights into how each engine optimizes regular expressions.
2. **Testing with larger input strings**: Increasing the size of the test string can help identify performance differences between approaches for large inputs.
3. **Using a different testing framework or library**: Some libraries, like RegExBench, specialize in benchmarking regular expressions and may provide more accurate results.

Keep in mind that the choice of approach depends on the specific use case and requirements of your benchmark.

Related benchmarks:

Regexp test for safari (version: 1)

Regexp test for safari

Comparing performance of: string match REGEXP vs string match REGEXP CTOR vs regex exec REGEXP vs regex exec REGEXP CTOR

Created: 3 years ago by: Registered User

Jump to the latest result

string match REGEXP

string match REGEXP CTOR

regex exec REGEXP

regex exec REGEXP CTOR

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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