Benchmark: Exceptions + Try/Catch vs Result object

Script Preparation code:

class Result {
 static value(value) {
   return new Result(false, value);
 }
  
 static error(error) {
   return new Result(true, error);
 }
  
 constructor(isError, value) {
   this.isError = isError;
   this.value = value;
 }
}

function inverseErr(num) {
  if(num === 0) throw new Error("Cannot divide by 0!");
  return 1 / num;
}

function inverseRes(num) {
  if(num === 0) return Result.error("Cannot divide by 0!");
  return Result.value(1 / num);
}

Tests:

Exceptions + Try/Catch
const inverses = []; for(let i = 0; i < 100; i++) { try { inverses.push(inverseErr(i % 2)); } catch(e) { inverses.push(null); } }
Result object
const inverses = []; for(let i = 0; i < 100; i++) { const inverse = inverseRes(i % 2); inverses.push(inverse.isError ? null : inverse.value); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Exceptions + Try/Catch
Result object

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

I'll break down the provided JSON for MeasureThat.net benchmark and explain what's being tested.

**Benchmark Definition**

The benchmark defines two test cases:

1. **Exceptions + Try/Catch**: This test case creates an array `inverses` and pushes the result of `inverseErr(i % 2)` into it using a try-catch block. If an error occurs, `null` is pushed into the array.
2. **Result object**: This test case creates an array `inverses` and pushes the result of `inverseRes(i % 2)` into it. The result is determined by checking if the returned value from `inverseRes` has an `isError` property, in which case `null` is pushed into the array; otherwise, the actual value is pushed.

**Options being compared**

The two test cases compare the performance of using a try-catch block (with exceptions) versus using a result object (without exceptions). The result object approach avoids throwing errors and instead returns a boolean value indicating whether an error occurred.

**Pros and Cons:**

* **Try-Catch Approach:**
	+ Pros:
		- Encapsulates the error handling logic, making it easier to handle specific error scenarios.
		- Allows for more flexible error handling (e.g., logging, error reporting).
	+ Cons:
		- Can be slower due to the overhead of throwing and catching exceptions.
* **Result Object Approach:**
	+ Pros:
		- Faster execution speed, as it avoids the overhead of throwing and catching exceptions.
		- More straightforward and simpler to implement.
	+ Cons:
		- Requires additional logic to determine whether an error occurred (in this case, checking if `isError` is true).

**Library**

The provided benchmark uses a custom `Result` class, which represents a value that may be either an error (`true`) or a normal value (`false`). This library allows for a more concise way to handle errors in the result object approach.

**Special JS feature/Syntax**

This benchmark does not use any special JavaScript features or syntax, so I won't comment on it.

**Other alternatives**

If you were to rewrite this benchmark using different approaches, here are some alternatives:

* Use `Promise` instead of try-catch: You could use Promises to handle errors in a more asynchronous manner.
* Use async/await: This approach would simplify the result object test case by eliminating the need for manual error handling.
* Use a different error-handling mechanism (e.g., `finally` block, error callbacks): Depending on your specific requirements, you might choose an alternative error-handling mechanism.

Overall, this benchmark provides a simple and straightforward way to compare the performance of two common approaches to error handling in JavaScript: try-catch blocks with exceptions versus result objects.

Related benchmarks:

Exceptions + Try/Catch vs Result object (version: 0)

Comparing performance of: Exceptions + Try/Catch vs Result object

Created: 3 years ago by: Registered User

Jump to the latest result

Exceptions + Try/Catch

Result object

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):