Benchmark: eval, strict Function, Function, bare

Tests:

eval
var data = eval("{a: 2 * 3,now: new Date(12345)}");
Stricct new Function
var data = (new Function('"use strict";return {a: 2 * 3,now: new Date(12345)}'))();
not strict test
var data = (new Function('return {a: 2 * 3,now: new Date(12345)}'))();
bare
var data = {a: 2 * 3,now: new Date(12345)};

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
eval
Stricct new Function
not strict test
bare

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks.

**Benchmark Definition**

The benchmark is defined as:

"var data = eval(\"{a: 2 * 3,now: new Date(12345)}\");"

This script attempts to evaluate a JSON string using the built-in `eval()` function. The goal of this benchmark is to measure the performance of different ways to access and manipulate JavaScript objects.

**Benchmark Options**

There are four options compared in this benchmark:

1. **`eval()`**: Uses the `eval()` function to execute the given code.
2. **`strict Function`**: Creates a new function with strict mode enabled, which executes the provided code.
3. **`not strict test`**: Creates a new function without strict mode enabled, which executes the provided code.
4. **`bare`**: Directly assigns the given JSON string to a variable.

**Pros and Cons of each approach**

1. **`eval()`**:
	* Pros: Easy to use, no need to declare variables or functions explicitly.
	* Cons: Can be slow due to security restrictions and potential performance issues with complex expressions.
2. **`strict Function`**:
	* Pros: Provides a controlled environment for execution, can help prevent common JavaScript errors like `use strict;` syntax mistakes.
	* Cons: May introduce unnecessary overhead or complexity compared to non-strict approaches.
3. **`not strict test`**:
	* Pros: Similar performance characteristics to `bare`, with the added benefit of being a more traditional way of executing code.
	* Cons: May be slower than `eval()` due to security restrictions and potential performance issues.
4. **`bare`**:
	* Pros: Simple, straightforward approach with minimal overhead or complexity.
	* Cons: Requires manual management of variable declarations and assignments.

**Library Usage**

There is no explicit library usage in this benchmark definition. However, it's worth noting that the `eval()` function relies on a built-in JavaScript mechanism to evaluate code, which can be a security feature as well.

**Special JS Features/Syntax**

The only special feature/syntax used in this benchmark is the use of strict mode (`"use strict";`) in the `strict Function` approach. This is a standard feature introduced in ECMAScript 2015 (ES6) that enables strict syntax for variable declarations and assignments.

**Alternatives**

Other alternatives to these approaches might include:

* Using a library like `es5-shim` or `ecmascript-lite` to provide a more traditional, non-strict way of executing code.
* Implementing custom parsing and execution logic for the JSON string using a language like C++ or Rust.
* Utilizing a different JavaScript engine or runtime environment that may offer improved performance characteristics.

These alternatives might be overkill for a simple benchmark like this one, but they demonstrate the flexibility and range of options available when it comes to executing code in JavaScript.

Related benchmarks:

eval, strict Function, Function, bare (version: 0)

Comparing performance of: eval vs Stricct new Function vs not strict test vs bare

Created: 3 years ago by: Guest

Jump to the latest result

eval

Stricct new Function

not strict test

bare

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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