Toggle navigation
MeasureThat
.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
test nulling object and overwriting vs overwriting
(version: 0)
Comparing performance of:
1 vs 2
Created:
2 years ago
by:
Guest
Go to the latest result
Script Preparation code:
let a = 99;
Tests:
1
for(let i = 0; i<1000; i++) { a = null; a = 99; a = 1; }
2
for(let i = 0; i<1000; i++) { a = 99; a = 1; }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
1
2
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
2 years ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36 OPR/105.0.0.0
Browser/OS:
Opera 105 on Windows
View result in a separate tab
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=502996" width="100%" height="500px"></iframe>
2
9K/s
1
6K/s
View exact numbers
Test name
Executions per second
✓
2
8,956 Ops/sec
1
5,966 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll break down the provided JSON for MeasureThat.net, explaining what's being tested and comparing different approaches. **Benchmark Definition** The benchmark definition is an object with the following properties: * `Name`: The name of the benchmark, which is "test nulling object and overwriting vs overwriting". * `Description`: An empty string, indicating that no description was provided. * `Script Preparation Code`: A JavaScript code snippet that initializes a variable `a` to 99. This code is executed before running the benchmark. * `Html Preparation Code`: An empty string, indicating that no HTML preparation code was needed. **Individual Test Cases** The benchmark consists of two test cases: 1. **Test Case 1**: The benchmark definition is a `for` loop that runs 1000 times, where: * Inside the loop, `a` is first set to `null`. * Then, `a` is reassigned to 99. * Finally, `a` is assigned the value 1. 2. **Test Case 2**: The benchmark definition is another `for` loop that runs 1000 times, where: * Inside the loop, `a` is first set to 99. * Then, `a` is reassigned to 1. **Comparison of Approaches** The two test cases compare the performance differences between: 1. **Nulling out a variable**: In Test Case 1, `a` is first set to `null`, and then reassigned to 99 before being assigned 1. This approach can lead to slower execution due to the garbage collection process. 2. **Overwriting without nulling**: In Test Case 2, `a` is directly reassigned from 99 to 1 without going through a null state. **Pros and Cons** * Nulling out a variable (Test Case 1): + Pros: Avoids potential issues with garbage collection and caching. + Cons: May introduce additional overhead due to the null assignment. * Overwriting without nulling (Test Case 2): + Pros: Often faster execution, as it avoids the need for garbage collection. + Cons: May lead to issues if the variable is accessed after being overwritten. **Library and Special JavaScript Features** There are no libraries mentioned in the benchmark definition. However, the `for` loop syntax is a standard feature of JavaScript, and there are no special features or syntax used in this benchmark. **Other Alternatives** Alternative approaches for this benchmark could include: * Using different data structures, such as an array or object, instead of a single variable. * Adding additional operations to each test case, such as concatenating strings or performing arithmetic calculations. * Using different browsers or devices with varying performance characteristics. * Experimenting with optimized JavaScript code or compilers. Overall, this benchmark is designed to evaluate the performance differences between two specific approaches to overwriting a variable: nulling it out versus directly assigning a new value without going through a null state.
Related benchmarks
Double a number
typeof number vs. Number.isNan vs. isNan vs self comparison. Versus let
Comments
Confirm delete:
Do you really want to delete benchmark?