Benchmark: Symbol vs String property square bracket 2

Script Preparation code:

var foo = {};
var sym = Symbol();
var str = "key12345";

Tests:

Symbol
foo[sym] = 1;
String
foo[str] = 1;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Symbol
String

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.

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

**Benchmark Definition**

The benchmark is testing two different ways to access and set properties on an object using a symbol (a unique identifier) versus a string. The script preparation code defines an empty object `foo` and creates a symbol `sym` and a string `str`.

**Options Being Compared**

There are two options being compared:

1. **Symbol-based property access**: This option uses the symbol `sym` to access the `foo` object. Specifically, it sets the property `foo[sym] = 1;`.
2. **String-based property access**: This option uses the string `"str"` to access the `foo` object. Specifically, it sets the property `foo[str] = 1;`.

**Pros and Cons**

**Symbol-based approach:**

Pros:

* Symbols are unique and can't be accidentally overridden by other properties with the same value.
* Symbols are more secure than strings, as they can't be easily manipulated or spoofed.

Cons:

* Symbols have been around since ECMAScript 2015 (ES6), so older browsers might not support them.
* Symbols require a good understanding of ES6 syntax and semantics.

**String-based approach:**

Pros:

* Strings are widely supported by most modern browsers, even those that don't fully support symbols.
* String-based property access is more familiar and easier to understand for developers who aren't as comfortable with symbols.

Cons:

* As mentioned earlier, strings can be accidentally overridden or spoofed, making this approach less secure than the symbol-based one.
* String-based property access might be slower due to the overhead of string manipulation.

**Other Considerations**

The benchmark doesn't consider other factors that could affect performance, such as:

* Object size: The size of the `foo` object affects how many properties can be accessed and stored. Larger objects may lead to slower performance.
* Property values: The values assigned to the properties (`1` in this case) don't significantly impact performance.
* Browser caching: Browsers cache frequently used scripts and resources, which could affect benchmark results.

**Library Usage**

None of the test cases use any external libraries that would impact the benchmark's results.

**Special JS Features or Syntax**

There are no special JavaScript features or syntax being tested in this benchmark. However, if you were to add more complexity to the script preparation code or modify the `Benchmark Definition` JSON, additional considerations might arise:

* **let/const declarations**: If you use `let` or `const` instead of `var`, it would affect how the variables are scoped and accessed.
* **arrow functions**: If you replace the traditional function syntax with arrow functions, it would impact how the functions are executed and their performance.

**Alternatives**

Other alternatives for benchmarking property access and setting include:

* Using numeric properties (`foo[0] = 1;`)
* Using arrays as objects (`foo[0] = { foo: 'bar' };`)
* Comparing different data types, such as numbers or booleans, instead of strings or symbols.
* Adding more complexity to the benchmark by including loops, conditionals, or other control flow elements.

Keep in mind that each alternative would require a new set of test cases and considerations.

Related benchmarks:

Symbol vs String property square bracket 2 (version: 0)

Comparing performance of: Symbol vs String

Created: 3 years ago by: Guest

Jump to the latest result

Symbol

String

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):