Benchmark: Check if Try-Catch block affects performance (In Chrome there is a warning: Not optimized: TryCatchStatement)

Script Preparation code:

var arr = [];
var count = 1000;
for(var i = 0; i<count; i++)
{
  arr.push(i);
}

Tests:

Without try catch
var arrLen = arr.length; var sum = 0; for (var i = 0; i < arrLen; i++){ sum = arr[i]; }
With try-catch
try{ var arrLen = arr.length; var sum = 0; for (var i = 0; i < arrLen; i++){ sum = arr[i]; } } catch(e) { console.log(e.toString()); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Without try catch
With try-catch

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 months ago)

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_6_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.6 Mobile/15E148 Safari/604.1

Browser/OS: Mobile Safari 17 on iOS 17.6.1

View result in a separate tab

Test name	Executions per second
Without try catch	2375533.8 Ops/sec
With try-catch	2419194.5 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):

LLMs can make mistakes. Check important info.

Let's break down what's being tested in this benchmark.

**Benchmark Goal:**
The goal of this benchmark is to measure the performance impact of using a try-catch block in JavaScript on the execution speed of simple arithmetic operations.

**Script Preparation Code:**
The script preparation code creates an array `arr` with 1000 elements and initializes a variable `count` set to 1000. This setup is used for both test cases (with and without try-catch).

**Html Preparation Code:**
There is no HTML preparation code provided, which suggests that the benchmark focuses solely on JavaScript performance and does not involve any UI-related work.

**Test Cases:**

1. **Without Try-Catch:**
The first test case runs a simple loop that iterates over the length of the `arr` array, adding each element to the `sum` variable.
2. **With Try-Catch:**
The second test case adds a try-catch block around the same code as above. If an exception is thrown (which is not expected in this case), it logs the error message to the console.

**Options Compared:**

* Without try-catch: The original, uncomplicated loop.
* With try-catch: The same loop with an additional try-catch block, which may introduce overhead due to the following:
	+ Exception handling: Checking for potential exceptions and handling them can slow down the code execution.
	+ Indirect call overhead: The try-catch block may involve indirect function calls, which can increase the execution time.

**Pros and Cons:**

* Without try-catch:
	+ Faster execution time due to less overhead.
	+ Simpler code with fewer operations.
* With try-catch:
	+ Provides better error handling and debugging capabilities.
	+ Can help prevent unexpected behavior or crashes in production code.

However, the increased complexity and potential overhead of try-catch blocks may result in slower performance compared to the uncomplicated loop.

**Library:**
None is explicitly mentioned in the benchmark definition.

**Special JavaScript Features/Syntax:**
There are no special features or syntaxes being tested beyond standard JavaScript. The focus is on measuring the performance impact of using a try-catch block.

**Alternatives:**

If you were to optimize this code for better performance, you might consider:

* Using `let` and `const` instead of `var` for variable declarations.
* Minimizing unnecessary computations or operations within the loop.
* Considering Just-In-Time (JIT) compilation or other optimization techniques specific to the JavaScript engine used.

Please note that these suggestions are based on general best practices and may not be directly applicable to this specific benchmark.

Related benchmarks:

Check if Try-Catch block affects performance (In Chrome there is a warning: Not optimized: TryCatchStatement) (version: 0)

Comparing performance of: Without try catch vs With try-catch

Created: 8 years ago by: Registered User

Jump to the latest result

Without try catch

With try-catch

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):