Benchmark: querystringify pre-initialize regexp

Script Preparation code:

function decode(input) {
  return decodeURIComponent(input.replace(/\+/g, ' '));
}

function querystringNotPrepared(query) {
  var parser = /([^=?&]+)=?([^&]*)/g
    , result = {}
    , part;

  for (;
    part = parser.exec(query);
    result[decode(part[1])] = decode(part[2])
  );

  return result;
}

var PARSER = /([^=?&]+)=?([^&]*)/g;

function querystringPrepared(query) {
  var result = {}
    , part;

  for (;
    part = PARSER.exec(query);
    result[decode(part[1])] = decode(part[2])
  );

  return result;
}

​x
 
function decode(input) {  return decodeURIComponent(input.replace(/\+/g, ' '));}​function querystringNotPrepared(query) {  var parser = /([^=?&]+)=?([^&]*)/g    , result = {}    , part;​  for (;    part = parser.exec(query);    result[decode(part[1])] = decode(part[2])  );​  return result;}​var PARSER = /([^=?&]+)=?([^&]*)/g;​function querystringPrepared(query) {  var result = {}    , part;​  for (;    part = PARSER.exec(query);    result[decode(part[1])] = decode(part[2])  );​  return result;}

Tests:

not prepared
querystringNotPrepared( 'foo=bar&bar=foo' );
querystringNotPrepared( 'foo=bar&bar=foo' );
prepared
querystringPrepared( 'foo=bar&bar=foo' );
querystringPrepared( 'foo=bar&bar=foo' );

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Experimental features:

Memory measurements supported only in Chrome.
For precise memory measurements Chrome must be launched with --enable-precise-memory-info flag.
More information: Monitoring JavaScript Memory

Test case name	Result
not prepared
prepared

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 7 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.79 Safari/537.36

Browser/OS: Chrome 61 on Mac OS X 10.12.6

View result in a separate tab

Test name	Executions per second
not prepared	268078.1 Ops/sec
prepared	250046.7 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 7 months ago):

I'll break down the benchmark and its components for you.

Benchmark Overview

The provided JSON represents a JavaScript microbenchmark created on MeasureThat.net. The benchmark compares two approaches to parse query strings in JavaScript: one with the querystringNotPrepared function and another with the querystringPrepared function.

Prepared vs Not Prepared Query String Parsing

In this benchmark, we have two test cases:

not prepared: This test case uses the querystringNotPrepared function to parse a query string without pre-initializing the regular expression.
prepared: This test case uses the querystringPrepared function to parse a query string with pre-initialized regular expression.

Options Compared

The two functions, querystringNotPrepared and querystringPrepared, differ in how they handle regular expressions for parsing query strings:

querystringNotPrepared:
- Uses a regular expression (/([^=?&]+)=?([^&]*)/g) that is not pre-initialized.
- The regular expression is created on the fly during each execution of the function.
querystringPrepared:
- Reuses a pre-initialized regular expression variable PARSER.
- This approach assumes that the regular expression has already been compiled and can be reused.

Pros and Cons

querystringNotPrepared:
- Pros: No overhead of compiling a regular expression, simpler code.
- Cons: Each execution creates a new regular expression, which may lead to performance issues due to repeated compilation times.
querystringPrepared:
- Pros: Reuses the compiled regular expression, reducing compilation overhead and potential performance improvements.
- Cons: Requires an initial compilation step, which can be slower than the on-the-fly approach.

Library/Function Used

There is no external library used in this benchmark. The functions querystringNotPrepared and querystringPrepared are defined directly in the benchmark script.

Special JS Feature/Syntax

There are no special JavaScript features or syntaxes used in this benchmark beyond the use of regular expressions.

Other Alternatives

If you were to implement a query string parsing function, you might consider other approaches:

Using a dedicated library: Libraries like querystring (available in Node.js) provide optimized implementations for parsing query strings.
RegEx options: You could experiment with different RegEx options or flags to optimize the performance of your implementation.
String manipulation functions: Some languages have built-in string manipulation functions that might be faster than using a regular expression.

Keep in mind that these alternatives would depend on the specific requirements and constraints of your project.

LLMs can make mistakes. Check important info.

I'll break down the benchmark and its components for you.

**Benchmark Overview**

The provided JSON represents a JavaScript microbenchmark created on MeasureThat.net. The benchmark compares two approaches to parse query strings in JavaScript: one with the `querystringNotPrepared` function and another with the `querystringPrepared` function.

**Prepared vs Not Prepared Query String Parsing**

In this benchmark, we have two test cases:

1. `not prepared`: This test case uses the `querystringNotPrepared` function to parse a query string without pre-initializing the regular expression.
2. `prepared`: This test case uses the `querystringPrepared` function to parse a query string with pre-initialized regular expression.

**Options Compared**

The two functions, `querystringNotPrepared` and `querystringPrepared`, differ in how they handle regular expressions for parsing query strings:

1. **`querystringNotPrepared`**:
	* Uses a regular expression (`/([^=?&]+)=?([^&]*)/g`) that is not pre-initialized.
	* The regular expression is created on the fly during each execution of the function.
2. **`querystringPrepared`**:
	* Reuses a pre-initialized regular expression variable `PARSER`.
	* This approach assumes that the regular expression has already been compiled and can be reused.

**Pros and Cons**

1. **`querystringNotPrepared`**:
	* Pros: No overhead of compiling a regular expression, simpler code.
	* Cons: Each execution creates a new regular expression, which may lead to performance issues due to repeated compilation times.
2. **`querystringPrepared`**:
	* Pros: Reuses the compiled regular expression, reducing compilation overhead and potential performance improvements.
	* Cons: Requires an initial compilation step, which can be slower than the on-the-fly approach.

**Library/Function Used**

There is no external library used in this benchmark. The functions `querystringNotPrepared` and `querystringPrepared` are defined directly in the benchmark script.

**Special JS Feature/Syntax**

There are no special JavaScript features or syntaxes used in this benchmark beyond the use of regular expressions.

**Other Alternatives**

If you were to implement a query string parsing function, you might consider other approaches:

1. **Using a dedicated library**: Libraries like `querystring` (available in Node.js) provide optimized implementations for parsing query strings.
2. **RegEx options**: You could experiment with different RegEx options or flags to optimize the performance of your implementation.
3. **String manipulation functions**: Some languages have built-in string manipulation functions that might be faster than using a regular expression.

Keep in mind that these alternatives would depend on the specific requirements and constraints of your project.

Related benchmarks:

querystringify pre-initialize regexp (version: 0)

Comparing performance of: not prepared vs prepared

Created: 7 years ago by: Guest

Jump to the latest result

not prepared

prepared

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 7 months ago):