Benchmark: JS if/if vs if/else if with negotiations

Script Preparation code:

var obj = { type: 1 }

Tests:

if/if
if(!obj) { return 'not defined' } if(obj.type === 1) { return 'defined 1' } if(obj.type === 2) { return 'defined 2' }
if/else if heterogeneous
if(!obj) { return 'not defined' } else if(obj.type === 1) { return 'defined 1' } else if(obj.type === 2) { return 'defined 2' }
if & if/else if homogeneous
if(!obj) { return 'not defined' } if(obj.type === 1) { return 'defined 1' } else if(obj.type === 2) { return 'defined 2' }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
if/if
if/else if heterogeneous
if & if/else if homogeneous

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:131.0) Gecko/20100101 Firefox/131.0

Browser/OS: Firefox 131 on Windows

View result in a separate tab

Test name	Executions per second
if/if	353644064.0 Ops/sec
if/else if heterogeneous	356999264.0 Ops/sec
if & if/else if homogeneous	371661600.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down what is being tested in the provided JSON.

**Benchmark Definition**

The benchmark is testing the performance of two different approaches to check if an object exists and its type:

1. `if(!obj) { ... }`: This approach checks if the object `obj` is falsy (i.e., null, undefined, 0, "", etc.). If it's falsy, the code inside the block is executed.
2. `if(obj.type === 1) { ... }`: This approach checks if the `type` property of the object `obj` is equal to 1.

**Options compared**

The benchmark compares two approaches:

A) `if/if`: This approach uses a single `if` statement with multiple conditions, as in the first test case.
B) `if/else if homogeneous`: This approach uses an `if` statement followed by one or more `else if` statements, as in the second test case.
C) `if/else if heterogeneous`: This approach also uses an `if` statement followed by one or more `else if` statements, but with different types of conditions (i.e., checking for existence and type).

**Pros and cons of each approach**

A) `if/if`:
	* Pros: Simple to read and write.
	* Cons: May be slower due to the multiple checks.

B) `if/else if homogeneous`: This approach is not explicitly mentioned in the benchmark, so it's unclear what specific conditions are being checked. However, in general, this approach can be faster than A because it reduces the number of checks needed.
	* Pros: Reduces the number of checks.
	* Cons: May require more complex code to read.

C) `if/else if heterogeneous`: This approach is also not explicitly mentioned in the benchmark, so its specific characteristics are unclear. However, like B, it may be faster than A due to reduced checks.
	* Pros: Reduces the number of checks.
	* Cons: May require more complex code to read.

**Library and special JS feature**

None of the test cases use any libraries or special JavaScript features.

**Other considerations**

The benchmark seems to focus on the performance difference between these two approaches. However, it's worth noting that in real-world scenarios, readability and maintainability are often more important than performance.

If you were to optimize this code, you might consider using a more efficient data structure, such as a `Map` or an object with default values, instead of relying on multiple checks.

**Alternatives**

Other approaches could be:

1. Using the `in` operator to check if a property exists in an object.
2. Utilizing the `hasOwnProperty` method to check if an object has a specific property.
3. Employing a more modern approach using optional chaining (`?.`) and nullish coalescing (`??`) operators.

However, these alternatives are not explicitly mentioned in the benchmark, and their performance impact might be different from the approaches being compared.

Related benchmarks:

JS if/if vs if/else if with negotiations (version: 0)

Modification of https://www.measurethat.net/Benchmarks/Show/1726/0/js-ifif-vs-ifelse-if with test case for heterogeneous checks

Comparing performance of: if/if vs if/else if heterogeneous vs if & if/else if homogeneous

Created: one year ago by: Guest

Jump to the latest result

if/if

if/else if heterogeneous

if & if/else if homogeneous

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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