Toggle navigation
MeasureThat
.net
Create a benchmark
Tools
Feedback
Feature Requests
FAQ
Register
Log In
string comparison
(version: 0)
Benchmark.js
Comparing performance of:
== vs ===
Created:
8 years ago
by:
Guest
Go to the latest result
Script Preparation code:
var attribute = 'field'
Tests:
==
if(attribute == 'field'){ return true; }
===
if(attribute === 'field'){ return true; }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
==
===
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Mobile Safari/537.36
Browser/OS:
Chrome Mobile 133 on Android
View result in a separate tab
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=588922" width="100%" height="500px"></iframe>
==
130.4M/s
===
129.6M/s
View exact numbers
Test name
Executions per second
✓
==
130,397,224 Ops/sec
===
129,647,800 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'd be happy to help explain the JavaScript microbenchmark on MeasureThat.net. **Benchmark Definition** The provided benchmark definition is simple, with a script preparation code that declares a variable `attribute` and assigns it the string value `'field'`. There's no HTML preparation code, which suggests that this benchmark is focused solely on the JavaScript engine's performance. **Options Compared** In this benchmark, two options are compared: 1. **Strict Equality (`==`)** 2. **Loose Equality (`===`)** These two comparisons have different outcomes due to differences in their behavior regarding type coercion and comparison rules. **Pros and Cons of Each Approach:** * **Strict Equality (`==`):** * Pros: * Less prone to errors, as it only considers value equality. * Often preferred when ensuring exact matches between values. * Cons: * Can be slower due to the additional overhead of type coercion checks. * May lead to unexpected behavior if one or both operands are not numbers or strings. * **Loose Equality (`===`):** * Pros: * Faster, as it skips unnecessary type coercion checks. * Provides better support for comparing values with different data types (e.g., `null === undefined`). * Cons: * May lead to errors if one or both operands are not of the expected type. **Library and Purpose** In this benchmark, there is no explicit library being used. However, some JavaScript features like `===` rely on the concept of "type coercion" and the behavior of these operators might be influenced by the implementation of other libraries. **Special JS Features or Syntax** The use of `===` instead of `==` introduces a special feature in JavaScript called "strict equality" which ensures that only values with the same type will match. This helps prevent unexpected behavior caused by type coercion, but may make code slightly slower due to additional checks at runtime. **Other Alternatives:** If you're looking for alternatives or want to explore other performance comparison scenarios, here are some options: 1. **Array vs. Object Iteration:** Compare the time taken by different iteration methods (e.g., `for...in`, `forEach`, `reduce()`) when working with arrays and objects. 2. **String Concatenation vs. Template Literals:** Investigate the performance differences between concatenating strings using the traditional method (`+` operator) versus template literals. 3. **Regular Expressions vs. String Methods:** Compare the execution speed of regular expression patterns against string methods like `replace()` or `indexOf()`. 4. **Object Creation vs. Array Creation:** Examine the time taken by different approaches to create objects and arrays (e.g., using the object literal `{}` versus an array `[ ]`). These alternatives will provide a better understanding of how JavaScript's performance behaves under various scenarios, which can be valuable for optimizing your code or identifying areas where improvements are needed.
Related benchmarks
value comparison vs. JSON.stringify
Comments
Confirm delete:
Do you really want to delete benchmark?