Benchmark: Test Said - MeasureThat.net

Tests:

v1
let index = -1; index = 2; index > -1;
v2
let index; index = 2; typeof index === 'number';

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
v1
v2

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36

Browser/OS: Chrome 114 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
v1	953331520.0 Ops/sec
v2	955755136.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'd be happy to explain the benchmark being measured on MeasureThat.net.

**What is tested?**

The provided benchmark tests two different approaches for setting a variable's value and then checking its type. The first test case (`v1`) measures the time it takes to set a variable to a value using a simple assignment statement (`index = 2;`). The second test case (`v2`) measures the time it takes to declare a variable, assign a value to it, and then check its type using the `typeof` operator (`typeof index === 'number';`).

**Options compared**

The benchmark compares two different approaches:

1. **Direct assignment**: In this approach, the variable is assigned a value directly using an assignment statement (e.g., `index = 2;`). This approach is simple and straightforward.
2. **Declaration and type checking**: In this approach, the variable is declared without assigning a value to it initially, and then the value is assigned later (`let index; index = 2;`), followed by a check of its type using `typeof`. This approach allows for more explicit control over variable scope and type checking.

**Pros and cons**

* **Direct assignment**: Pros:
	+ Simple and straightforward
	+ Fewer operations to perform (only assignment)
Cons:
	+ May not be as efficient due to potential overhead from the assignment operation
* **Declaration and type checking**: Pros:
	+ More explicit control over variable scope and type checking
	+ Can help catch type-related errors at runtime
Cons:
	+ More operations to perform (declaration, assignment, type check)
	+ May introduce additional overhead

**Library usage**

There is no library used in this benchmark.

**Special JavaScript feature or syntax**

The `typeof` operator is used in the second test case (`v2`). The `let` keyword with a semicolon before its value is also used, which is called "variable declaration with initializer" (since ES6). This is not a special JavaScript feature per se, but it's a modern JavaScript syntax.

**Other alternatives**

There are other approaches that could be tested in this benchmark:

* Using `const` instead of `let` for variable declarations
* Using `var` instead of `let` or `const`
* Using different data types (e.g., numbers, strings, booleans) to check the type operator's behavior
* Adding more complex statements before and after the assignment, such as function calls or expressions involving other variables

Keep in mind that these alternatives may change the benchmark's results due to differences in performance, syntax, or semantic implications.

Related benchmarks:

Test Said (version: 0)

.

Comparing performance of: v1 vs v2

Created: one year ago by: Guest

Jump to the latest result

v1

v2

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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