Benchmark: branchfuncofbranchlessmapfuncfork

Script Preparation code:

var branchlessMap = [function(){global = "error"}, function(a, b){global = a - b ^ a}, function(a, b) {global = a ** b}];
var global;
var thing = 50;

Tests:

branch
thing *= 2; if(thing > 100) { global = thing - 100 ^ thing; } else { global = "error"; } if(thing < 100) { global = thing ** 100; } else { global = "error"; }
branchless map
thing *= 2; branchlessMap[(thing > 100) * 1](thing); branchlessMap[(thing < 100) * 2](thing);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
branch
branchless map

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days 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 defined by two separate scripts: `Script Preparation Code` and `Html Preparation Code`. The `Script Preparation Code` defines an array of functions called `branchlessMap`, which contains three different implementations:

1. `function(){global = "error"}`: This function sets a global variable named `global` to the string `"error"`.
2. `function(a, b){global = a - b ^ a}`: This function takes two arguments `a` and `b`, and sets `global` to the result of the expression `a - b ^ a`. This is essentially a no-op operation.
3. `function(a, b) {global = a ** b}`: This function takes two arguments `a` and `b`, and sets `global` to the result of raising `a` to the power of `b`.

The `Html Preparation Code` is empty, which means there's no HTML code being executed in this benchmark.

**Options Compared**

The benchmark compares three different approaches:

1. **Branching**: This approach uses traditional if-else statements to determine which branch to take.
2. **Branchless Map**: This approach uses an array of functions (`branchlessMap`) to call the correct function based on a condition.
3. **Fork**: The benchmark doesn't explicitly mention a "fork" option, but it's likely referring to the use of multiple branches or conditional statements.

**Pros and Cons**

1. **Branching**: Pros: simple and easy to understand. Cons: can be slower due to the overhead of conditionals.
2. **Branchless Map**: Pros: potentially faster and more concise than branching, as it eliminates the need for conditionals. Cons: may require additional setup and understanding of the `branchlessMap` array.
3. **Fork**: Not explicitly mentioned in the benchmark, but likely refers to multiple branches or conditional statements.

**Library Usage**

The `branchlessMap` array is used by both the "Branch" and "Branchless Map" test cases. The purpose of this array is to store a set of functions that can be called dynamically based on conditions.

**Special JS Features**

There doesn't appear to be any special JavaScript features or syntax being used in this benchmark, apart from the use of `global` as a variable name, which might not be conventional.

**Alternatives**

Other alternatives for writing such benchmarks could include:

1. Using a framework like NumJS (a JavaScript port of NumPy) to compare numerical computations.
2. Writing a benchmark using a different programming language, such as C or Rust.
3. Creating a benchmark that focuses on specific areas, such as memory allocation or garbage collection.

Keep in mind that the specifics of the benchmark and its implementation may not be immediately clear without more context, so it's essential to carefully review the code and test cases before drawing conclusions about performance differences between these approaches.

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (X11; CrOS x86_64 14526.89.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.133 Safari/537.36

Browser/OS: Chrome 100 on Chrome OS 14526.89.0

View result in a separate tab

Test name	Executions per second
branch	641614.8 Ops/sec
branchless map	503104.9 Ops/sec

Related benchmarks:

branchfuncofbranchlessmapfuncfork (version: 0)

idk

Comparing performance of: branch vs branchless map

Created: 2 years ago by: Guest

Jump to the latest result

branch

branchless map

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):