Benchmark: Nath's Switch vs Object Literal Test

Script Preparation code:

var str = 'abcdefghi';
str = str.charAt(Math.floor(Math.random() * 3));

Tests:

Switch
switch (str) { case 'a': console.log('A'); break; case 'b': console.log('B'); break; case 'c': console.log('C'); break; case 'd': console.log('D'); break; case 'e': console.log('E'); break; case 'f': console.log('F'); break; case 'g': console.log('G'); break; case 'h': console.log('H'); break; case 'i': console.log('I'); break; }
Object Literal
var objLiteral = { a: function() { console.log('A'); }, b: function() { console.log('B'); }, c: function() { console.log('C'); }, d: function() { console.log('D'); }, e: function() { console.log('E'); }, f: function() { console.log('F'); }, g: function() { console.log('G'); }, h: function() { console.log('H'); }, i: function() { console.log('I'); } } objLiteral[str]();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Switch
Object Literal

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.

**Benchmark Overview**

The provided JSON represents a JavaScript microbenchmark test case on MeasureThat.net, where users can compare the performance of two approaches: a traditional `switch` statement and an object literal-based approach.

**Benchmark Definition Explanation**

The benchmark definition describes a simple script that sets a string variable `str` to a random character from 'a' to 'i'. Then, it uses either a `switch` statement or an object literal with a function reference to execute a log statement for each case. The script preparation code is provided to ensure consistency across different browsers.

**Options Compared**

The benchmark compares two options:

1. **Traditional Switch Statement**: Uses the `switch` keyword to evaluate the value of the `str` variable and executes a corresponding branch.
2. **Object Literal-Based Approach**: Uses an object literal with function references to achieve similar behavior as the traditional switch statement.

**Pros and Cons**

**Traditional Switch Statement:**

Pros:

* Concise and easy to read
* Can be used for simple, one-time evaluations
* Supports fall-through behavior

Cons:

* Can lead to slower performance due to the overhead of branching
* Limited support for complex cases (e.g., multiple conditions)

**Object Literal-Based Approach:**

Pros:

* Offers more flexibility than traditional switch statements
* Can handle complex cases with ease
* Can be optimized using techniques like function caching or memoization

Cons:

* May require more code and complexity
* Can lead to slower performance due to the overhead of dynamic property access

**Library/Function Used in Benchmark**

In this benchmark, no explicit libraries are used. However, JavaScript engines often use optimizations and internal functions that might affect the outcome.

**Special JS Features/Syntax**

The benchmark uses a modern feature: **Template Literals** (`\r\n str = str.charAt(Math.floor(Math.random() * 3));`). This feature is supported in most modern browsers, but not older versions. It's used to generate a random character for the `str` variable.

Other considerations:

* The benchmark runs on multiple devices (Desktop) with different browser versions and OSes.
* The test case measures the number of executions per second (`ExecutionsPerSecond`) to evaluate performance differences.

**Alternatives**

If you want to measure the performance of other approaches, such as:

1. **Regex-Based Approach**: Using regular expressions to match and execute the log statement for each character.
2. **Array-Based Approach**: Using an array of functions with corresponding indices to execute the log statements.
3. **Other Optimizations**: Exploring additional optimizations like function inlining or caching.

Keep in mind that each approach has its strengths and weaknesses, and the best choice depends on your specific use case and requirements.

Related benchmarks:

Nath's Switch vs Object Literal Test (version: 0)

Comparing performance of: Switch vs Object Literal

Created: 5 years ago by: Guest

Jump to the latest result

Switch

Object Literal

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):