Benchmark: Symbol vs String property square bracketttt

Script Preparation code:

var foo = {};
var sym = Symbol("key");
var str = Symbol(1n);

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:

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

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**Benchmark Overview**

The provided benchmark compares the performance of accessing a property using a `Symbol` versus a string. The test measures how fast it is to assign a value to a property using either approach.

**Script Preparation Code**

The script preparation code sets up two variables: `foo` (an empty object) and `sym`/`str` (a `Symbol`). The `Symbol` is created with either a string literal (`"key"` or `1n`) or without any value (`Symbol(1n)`).

**Options Compared**

Two options are compared:

1. **Accessing using a Symbol**: The test assigns a value to the property `sym`/`str` on the object `foo`.
2. **Accessing using a string**: The test assigns a value to the property `str` on the object `foo`.

**Pros and Cons of Each Approach**

* **Symbol**: This approach uses the more modern and efficient way to access properties in JavaScript (ECMAScript 2015 and later). Symbols are uniquely generated and have faster lookups compared to strings. However, they require a separate variable for each unique property.
	+ Pros: Faster lookups, better performance.
	+ Cons: Requires more memory for storing symbol values, less readable code.
* **String**: This approach uses the older way of accessing properties in JavaScript (pre-ECMAScript 2015). Strings are looked up in an object using a simple search algorithm. While this may work well for short strings or small objects, it can become slow for large objects or long strings.
	+ Pros: More readable code, easier to implement for older browsers.
	+ Cons: Slower lookups, less efficient.

**Library and Special JS Features**

No library is required for this benchmark. The test only uses built-in JavaScript features.

There are no special JavaScript features (e.g., async/await, destructuring) used in this benchmark.

**Alternative Approaches**

Other alternatives to compare the performance of accessing properties include:

* Using a numeric array or object as an index
* Using a regular expression to search for the property name
* Using a custom indexing mechanism (e.g., a trie)
* Using a library like Lodash's `get` function, which can handle different types of keys and values.

These alternatives may have their own pros and cons compared to using symbols or strings directly.

Related benchmarks:

Symbol vs String property square bracketttt (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):