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params in lodash get
(version: 7)
Comparing performance of:
no level deep vs first level deep
Created:
7 years ago
by:
Registered User
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HTML Preparation code:
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
Script Preparation code:
function fn(x){return x;}
Tests:
no level deep
const attachment = fn({'a':{'x':{'y':{'z':{'o':1}}}}, 'b':2}) || {}; const locationId = _.get(attachment.a, 'x.y.z.o');
first level deep
const attachment = fn({'a':{'x':{'y':{'z':{'o':1}}}}, 'b':2}); const locationId = _.get(attachment, 'a.x.y.z.o');
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
no level deep
first level deep
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what is being tested. **Overview** The benchmark is testing two different approaches to accessing nested properties in an object using the `lodash.get()` method. **Benchmark Definitions** There are two benchmark definitions: 1. **"params in lodash get, no level deep"** This benchmark definition creates an object with a nested structure and attempts to access the value of `z.o` using `_get()`. The `fn()` function is used to create the object, and it's not necessary for the test. 2. **"params in lodash get, first level deep"** This benchmark definition creates an object with a nested structure but at the first level, and attempts to access the value of `x.y.z.o` using `_get()`. Again, the `fn()` function is used to create the object. **Comparison** The two approaches differ in how they handle the dot notation: * In the "no level deep" case, the dot notation is used with multiple levels (`z.o`). This means that the function will attempt to access `z` first and then `o`. * In the "first level deep" case, the dot notation is used with only one level (`x.y.z.o`). This means that the function will attempt to access `x`, then `y`, and finally `z`. **Options Compared** The two approaches compare the performance of using multiple levels of dot notation (`no level deep`) versus a single level of dot notation (`first level deep`). **Pros and Cons** * **Multiple Levels (No Level Deep)**: + Pros: This approach is more human-readable and easier to understand for developers. + Cons: It can be slower due to the additional lookup steps required. * **Single Level (First Level Deep)**: + Pros: It's likely faster because there are fewer lookup steps involved. + Cons: It may require more code changes or adjustments from developers who are accustomed to using multiple levels of dot notation. **Library and Purpose** The `lodash.get()` method is a utility function from the Lodash library. Its purpose is to safely access nested properties in an object, providing a default value if any of the properties do not exist. In this benchmark, `lodash.get()` is used to access the nested values in the objects created by the `fn()` function. **Special JS Feature or Syntax** There are no special JavaScript features or syntaxes mentioned in the provided code. The focus is on the performance comparison between two approaches to accessing nested properties using dot notation. **Alternatives** Other alternatives for accessing nested properties include: * Using bracket notation (`obj['a.b.c']`) instead of dot notation. * Using a loop to iterate over the object's keys and access the desired property. * Using a library like jQuery or React to handle nested data structures.
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