Benchmark: parenthesis or not

Tests:

parenthesis
var j = "MSKU765112"; var s = 0; s+=(j.charCodeAt(4)-48)*16; s+=(j.charCodeAt(5)-48)*32; s+=(j.charCodeAt(6)-48)*64; s+=(j.charCodeAt(7)-48)*128; s+=(j.charCodeAt(8)-48)*256; s+=(j.charCodeAt(9)-48)*512; return s;
without
var j = "MSKU765112"; var s = 0; s+=j.charCodeAt(4)*16-768; s+=j.charCodeAt(5)*32-1536; s+=j.charCodeAt(6)*64-3072; s+=j.charCodeAt(7)*128-6144; s+=j.charCodeAt(8)*256-12288; s+=j.charCodeAt(9)*512-24576; return s;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
parenthesis
without

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

Measuring JavaScript performance is crucial for optimizing code and understanding the behavior of different browsers. Let's break down what's being tested in this benchmark.

**Benchmark Definition**

The provided JSON represents a simple benchmark definition. It doesn't specify any particular scripting language, but it does define two test cases:

1. "parenthesis" - This test case uses parentheses to group operations in the expression.
2. "without" - This test case omits the use of parentheses.

**Options compared**

The two main options being compared are:

* Using parentheses for grouping in arithmetic expressions
* Not using parentheses for grouping in arithmetic expressions

**Pros and Cons of each approach**

Using parentheses for grouping (parenthesis):

Pros:

* Clearer code: Parentheses make it obvious that the operations inside them should be evaluated first.
* Easier to read and understand.

Cons:

* Performance overhead: Creating a new stack frame and pushing/popping values onto it can lead to slower performance compared to omitting parentheses.

Omitting parentheses (without):

Pros:

* Potential performance gain: Some JavaScript engines might optimize away the overhead of creating and destroying stack frames when using parentheses.

Cons:

* Less readable code: Without parentheses, the meaning of the expression becomes less clear, making it harder to understand and maintain.

**Library and special JS features**

There are no libraries mentioned in this benchmark. However, JavaScript has a few special features that might be relevant here:

* **Arithmetic operations**: In JavaScript, arithmetic operations like `+` and `-` can short-circuit if the second operand is 0. This means that some browsers might optimize away unnecessary calculations.

**Benchmark preparation code**

The provided benchmark preparation code consists of two scripts:

1. One script uses parentheses to calculate an integer value (`s`) based on the ASCII codes of specific characters in the string `"MSKU765112"`.
2. The other script omits parentheses and directly calculates the same integer value using arithmetic operations.

**Benchmark results**

The latest benchmark result shows the performance data for both test cases:

* "parenthesis": 992926528 executions per second
* "without": 990287872 executions per second

These values indicate that, according to this benchmark, omitting parentheses results in a slightly slower performance compared to using them.

**Other alternatives**

If you were to create your own JavaScript benchmarks, you might consider exploring other factors like:

* **Variable declarations**: Are there differences in performance between declaring variables with `var`, `let`, or `const`?
* **Array operations**: How do different algorithms and data structures (e.g., arrays vs. linked lists) impact performance in JavaScript?
* **Closure usage**: Do closures have a significant impact on performance, especially when used extensively?

When creating your own benchmarks, keep the following best practices in mind:

* Use clear and concise language to describe your benchmark's purpose and test cases.
* Provide context for each test case, including any relevant libraries or special features.
* Consider using a consistent naming convention for variables and functions across all test cases.
* Make sure to report accurate and meaningful results, including any potential noise or biases.

By following these guidelines, you can create high-quality benchmarks that help optimize your JavaScript codebase.

Related benchmarks:

parenthesis or not (version: 0)

Comparing performance of: parenthesis vs without

Created: 9 years ago by: Guest

Jump to the latest result

parenthesis

without

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):