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hasOwnProperty string vs number
(version: 0)
Object lookup performance
Comparing performance of:
number vs string
Created:
4 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var obj = { a: 1, b: 2, c: 3, 3: true, d: 4, e: 5 };
Tests:
number
obj.hasOwnProperty( 3 );
string
obj.hasOwnProperty( '3' );
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
number
string
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of MeasureThat.net, where JavaScript microbenchmarks come to life! **Benchmark Overview** The provided JSON represents a benchmark test case that compares the performance of two approaches: using a numeric value (`3`) and a string representation of the same value (`'3'`) in the `hasOwnProperty` method. **Options Being Compared** Two options are being compared: 1. **Numeric Value**: Using the literal numeric value `3` as the key in the object. 2. **String Representation**: Using the string `'3'` as the key in the object. **Pros and Cons of Each Approach** * **Numeric Value**: + Pros: Faster lookup times, as numeric values are typically stored as integers in JavaScript objects. + Cons: May not work correctly if the number is a non-integer value or has decimal points (due to type coercion). * **String Representation**: + Pros: Can handle non-numeric values and string representations of numbers, making it more flexible. + Cons: Slower lookup times due to string comparison. **Library Used** None, as this benchmark is a basic JavaScript test case without any external libraries or dependencies. **Special JS Feature/Syntax** The `hasOwnProperty` method is a built-in JavaScript method that checks if an object has the specified property as its own property (i.e., not inherited from its prototype chain). It's a common and useful method in many JavaScript scenarios. **Benchmark Preparation Code Explanation** The script preparation code defines an object `obj` with several properties, including one with a numeric key (`3`) and another with a string representation of the same value (`'3'`). This object is used as the test subject for the benchmark. **Individual Test Cases** Each individual test case consists of two parts: 1. A **Benchmark Definition**: A JavaScript statement that uses either the numeric value or string representation of the key in the `hasOwnProperty` method. 2. A **Test Name**: The name assigned to each test case, which corresponds to the type of key used (numeric or string). **Latest Benchmark Result** The provided JSON result shows the benchmark execution data for two test cases: 1. **Number**: The Chrome 98 browser on a desktop with Mac OS X 10.15.7 achieved an executions per second rate of approximately 11,993,944. 2. **String**: The same browser and device platform achieved an executions per second rate of approximately 11,413,027. These results suggest that using numeric values is faster than using string representations in the `hasOwnProperty` method. **Other Alternatives** If you're interested in exploring other benchmarking platforms or approaches, some alternatives include: 1. **JSPerf**: Another popular benchmarking platform for JavaScript. 2. **Benchmarking libraries**: Libraries like Benchmark.js or js-benchmark provide a structured way to create and compare benchmarks in your own projects. 3. **Local testing frameworks**: Frameworks like Jest or Mocha can be used to write and run benchmarks locally, allowing for more control over the testing environment. I hope this explanation has been helpful in understanding the MeasureThat.net benchmark!
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