Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Increment test
(version: 0)
Object lookup performance
Comparing performance of:
plus plus vs plus eq vs eq X plus
Created:
6 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var obj = { a: 1, b: 2, c: 3, d: 4, e: 5 };
Tests:
plus plus
obj.a++;
plus eq
obj.b+=1;
eq X plus
obj.c = obj.c + 1;
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
Fork
Test case name
Result
plus plus
plus eq
eq X plus
Fastest:
N/A
Slowest:
N/A
Latest run results:
No previous run results
This benchmark does not have any results yet. Be the first one
to run it!
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Measuring performance differences in JavaScript is crucial for optimizing code and ensuring compatibility across various browsers and environments. **Benchmark Analysis** The provided JSON represents a simple increment test, where the goal is to measure the performance of object lookup and assignment operations. The benchmark uses a predefined object `obj` with five properties (`a`, `b`, `c`, `d`, and `e`) initialized with values ranging from 1 to 5. **Benchmark Options** Three different approaches are compared in this benchmark: ### 1. Simple increment (`obj.a++;`) This option increments the value of property `a` by 1 using a single statement. This approach is likely to be the fastest since it's a simple and direct operation. Pros: Fastest expected result Cons: May not accurately represent real-world use cases, as it only tests a single increment operation ### 2. Plus equals (`obj.b += 1;`) This option increments the value of property `b` by 1 using the addition assignment operator (`+=`). This approach is more common in JavaScript code and may reflect how developers typically perform increment operations. Pros: More representative of real-world use cases Cons: May be slower than the simple increment due to the overhead of the assignment operator ### 3. Assignment with a temporary variable (`obj.c = obj.c + 1;`) This option creates a temporary variable, increments it by 1, and assigns its value to property `c`. This approach is more verbose and may lead to performance overhead. Pros: May provide insight into the performance of assignment operations Cons: Slower than the simple increment or plus equals approaches **Library Usage** None of the benchmark options explicitly use a library. However, if we consider the broader context of JavaScript execution, we might look at libraries like: * `V8` (used by Google Chrome): The engine that interprets and executes JavaScript code. * `SpiderMonkey` (used by Mozilla Firefox): Another popular JavaScript engine. **Special JS Feature/Syntax** There are no special features or syntaxes used in this benchmark. The focus is on measuring the performance of basic increment operations, which are widely applicable. **Alternative Benchmarks** If you'd like to explore different scenarios, consider adding more options or modifying the existing ones. Some ideas: * Measure the performance of object property access with and without memoization. * Compare the execution time of different data structures (e.g., arrays vs. objects). * Test the impact of browser-specific features, such as `let` and `const`, on performance. Keep in mind that benchmarking JavaScript performance can be complex due to factors like caching, just-in-time compilation, and garbage collection. Ensure your benchmarks are representative of real-world use cases and accurately reflect the performance characteristics of your code.
Related benchmarks:
undefined vs. typeof vs. in vs. hasOwnProperty big object
typeof first or second
hasOwnProperty string vs number
in vs hasOwn
Comments
Confirm delete:
Do you really want to delete benchmark?