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test empty object
(version: 0)
Comparing performance of:
stringify vs object.keys vs object.values vs getOwnPropertyNames
Created:
8 years ago
by:
Guest
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Tests:
stringify
var test = {}; if(JSON.stringify(test) === '{}') { return true; }
object.keys
var test = {}; if(!Object.keys(test).length) { return true; }
object.values
var test = {}; if(!Object.values(test).length) { return true; }
getOwnPropertyNames
var test = {}; if (Object.getOwnPropertyNames(test).length === 0){ return true; }
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Suite status:
<idle, ready to run>
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Test case name
Result
stringify
object.keys
object.values
getOwnPropertyNames
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'd be happy to help you understand the JavaScript microbenchmarks on MeasureThat.net. **Benchmark Definition** The benchmark definition is a JSON object that defines a simple test case. In this case, there are four different test cases: 1. `test empty object`: This test case checks if an empty object can be created and compared using `JSON.stringify()`. 2. `stringify`: This test case checks the performance of comparing an empty object to its JSON representation using `JSON.stringify()`. 3. `object.keys`, `object.values`, and `getOwnPropertyNames`: These three test cases check the performance of checking if an object is empty by iterating over its keys, values, or property names, respectively. **Options Compared** The benchmark compares different approaches for each test case: 1. `stringify`: * Direct comparison using `JSON.stringify(test) === '{}'` 2. `object.keys`, `object.values`, and `getOwnPropertyNames`: * Iterating over the keys, values, or property names of an empty object to check if it's empty * Using the length property to check if the iteration yielded any results **Pros and Cons** Here are some pros and cons for each approach: 1. `stringify`: + Pros: Simple and concise, can be faster for small objects. + Cons: May not work correctly for very large or complex objects, may have performance issues for certain browsers or versions. 2. Iterating over keys, values, or property names: + Pros: Can handle larger and more complex objects, more reliable results. + Cons: May be slower than direct comparison, requires more code. **Libraries Used** None of the test cases use any external libraries. **Special JS Features or Syntax** The `JSON.stringify()` function is a built-in JavaScript feature that converts an object to a JSON string. The `.length` property is also a built-in property that returns the number of elements in an array-like object. **Other Considerations** When benchmarking performance-critical code, it's essential to consider factors such as: * Data size and complexity * Browser or engine version * Hardware platform * Execution count and frequency In this case, the test cases cover relatively simple scenarios, but they provide a good starting point for understanding how different approaches can affect performance. **Alternatives** Other alternatives for benchmarking JavaScript performance include: * V8 Benchmark Suite (for Chrome-specific benchmarks) * jsPerf (a popular online benchmarking tool) * Node.js Performance Benchmarks * WebAssembly benchmarks These tools and suites provide a range of test cases and scenarios to help you evaluate the performance of your code in different environments.
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