Benchmark: comparison versus assignment

Tests:

comparison
let value = 'NA' if (value) { let one = 'test' }
assignment
let value = 'NA' let one = 'test'; let second = 'test';

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
comparison
assignment

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) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36

Browser/OS: Chrome 109 on Windows

View result in a separate tab

Test name	Executions per second
comparison	595404800.0 Ops/sec
assignment	599342144.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'd be happy to help explain the benchmark and its results.

**What is being tested?**

The benchmark is comparing two approaches: comparison versus assignment, and assignment versus comparison.

In the first test case ("comparison"), the code checks if a variable `value` has any value assigned to it. If it does, then another variable `one` is assigned the string "test".

In the second test case ("assignment"), a variable `one` is directly assigned the string "test" without any conditional check.

**Options compared**

The two approaches being tested are:

1. **Comparison (if-conditional)**: This approach checks if `value` has any value assigned to it before assigning `one`. It's essentially saying "only execute this code block if a variable has been initialized".
2. **Assignment without comparison**: This approach directly assigns `one` regardless of whether `value` has any value assigned to it.

**Pros and Cons of each approach**

**Comparison (if-conditional)**

Pros:

* Avoids unnecessary computations or memory allocations
* Can be beneficial for code readability and maintainability

Cons:

* May introduce additional overhead due to the conditional check
* Can lead to slower execution times if the condition is often false

**Assignment without comparison**

Pros:

* Can lead to faster execution times since there's no need for a conditional check
* Simplifies the code by eliminating the need for an if-conditional statement

Cons:

* May lead to unnecessary computations or memory allocations
* Can make the code less readable and maintainable, especially if the variable `one` is used in multiple places.

**Other considerations**

One other thing to consider is that both approaches have different behavior in certain edge cases. For example, what happens when `value` is set to `NaN` (Not a Number)? In this case, both approaches would produce different results. The comparison approach would evaluate the conditional statement and not execute any code, while the assignment without comparison approach would still assign `one`, but with an invalid value.

**Library usage**

There doesn't seem to be any explicit library usage in these benchmark cases. However, if we consider the JavaScript engine or browser being used for execution, it's likely that some underlying libraries or frameworks are utilized.

**Special JS features or syntax**

The only special feature I noticed is the use of backslashes (`\r\n`) in the benchmark definitions. This is a legacy way of writing newline characters in older versions of JavaScript or certain text editors. Modern JavaScript would typically use `\n` instead.

**Alternatives**

Other alternatives for testing similar benchmarks could include:

* **Null checks**: Using `if (value === null || value === undefined)` instead of `if (value)`.
* **Default values**: Providing default values for variables, like `let one = 'test'; let second = 'test';`, and then assigning a new value to `second` if needed.
* **Early returns**: Using early return statements to simplify the code and reduce unnecessary computations.

Keep in mind that the specific alternatives would depend on the context and requirements of the benchmark.

Related benchmarks:

comparison versus assignment (version: 0)

comparison versus assignment

Comparing performance of: comparison vs assignment

Created: 4 years ago by: Guest

Jump to the latest result

comparison

assignment

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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