Benchmark: ternary vs !! - MeasureThat.net

Tests:

!!
const a = !!undefined;
ternary
const a = undefined ? false : true;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
!!
ternary

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's dive into the explanation.

**Benchmark Definition and Purpose**

The provided benchmark measures the performance difference between two approaches: using the `!!` operator (also known as the "double-not" operator) versus a traditional ternary operator (`undefined ? false : true`) in JavaScript. The purpose of this benchmark is to determine which approach is faster, likely to optimize code for better execution speed.

**Options Compared**

Two options are compared:

1. **Ternary Operator**: `const a = undefined ? false : true;`
	* This approach uses a conditional statement with three parts: the condition (`undefined`), the "true" value, and the "false" value.
2. **!! Operator**: `const a = !!undefined;`
	* The `!!` operator is a single-expression operator that converts its operand to a boolean value by applying two negations.

**Pros and Cons of Each Approach**

1. **Ternary Operator**
	* Pros:
		+ More readable code, as it clearly expresses the intention of evaluating a condition.
		+ Can be more maintainable, especially in larger codebases.
	* Cons:
		+ May incur additional overhead due to the conditional statement's execution.
2. **!! Operator**
	* Pros:
		+ Compact and concise syntax, which can lead to faster execution.
		+ Often used for simple, boolean-like operations.
	* Cons:
		+ May be less readable, as its purpose is not immediately clear without understanding the operator's behavior.
		+ Can lead to unexpected results if not used carefully (e.g., `!!null` evaluates to `false`, while `null ? false : true` would).

**Library and Special Features**

In this benchmark, no specific JavaScript library is used. However, it does utilize a special feature of the `!!` operator, which applies two negations to its operand.

**Other Considerations**

* The benchmark likely considers factors like branch prediction, cache locality, and execution frequency when comparing these two approaches.
* Modern JavaScript engines often optimize or deoptimize certain operations based on their common usage patterns. The comparison between ternary operators and the `!!` operator may reveal specific optimizations or workarounds.

**Alternatives**

Other alternatives for evaluating a condition in JavaScript could include:

1. **Logical Operators**: Using `&&` (logical AND) or `||` (logical OR) with values can provide similar results to both approaches.
2. **Boolean Wraparound**: Using the `Boolean()` function or a similar construct to wrap around the value being evaluated.

Keep in mind that each approach has its trade-offs and may be more suitable for specific use cases or performance-critical code.

Related benchmarks:

ternary vs !! (version: 0)

ternary vs !!

Comparing performance of: !! vs ternary

Created: 4 years ago by: Guest

Jump to the latest result

!!

ternary

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):