Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Map vs Object setting
(version: 0)
Comparing performance of:
Map vs Object
Created:
5 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var map = new Map(); var obj = {}; var i = 0, count = 10000;
Tests:
Map
for (i = 0; i < count; i++) { map.set(i, i); }
Object
for (i = 0; i < count; i++) { obj[i + 'test'] = i; }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
Map
Object
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):
Let's dive into the world of JavaScript microbenchmarks! **What is being tested?** The provided benchmark compares two approaches to setting values in an object: using a `Map` data structure versus a plain object (`obj`). The test cases measure how fast each approach can set a specific value (represented by the variable `i`) 10,000 times. **Options compared:** 1. **Map**: A `Map` is a built-in JavaScript data structure that stores key-value pairs. In this case, it's used to store integers as both keys and values. 2. **Object**: A plain object (`obj`) is used to store integer values with a string key generated by concatenating `'test'` with the current value of `i`. **Pros and Cons:** * **Map**: + Pros: - Faster lookups due to its hash-based indexing. - More memory-efficient, as it only stores unique keys (in this case, integers). + Cons: - May have slower initialization times due to the overhead of creating a new `Map` object. * **Object**: + Pros: - Often easier to understand and work with for developers familiar with plain objects. + Cons: - Slower lookups due to the need to search through the object's properties. **Library used:** None. The test uses built-in JavaScript data structures (`Map` and `Object`) without any additional libraries or dependencies. **Special JS feature or syntax:** This benchmark doesn't use any special features like async/await, Promises, or modernized syntax (e.g., arrow functions). It's a straightforward, low-level comparison of two basic data structure approaches. **Other alternatives:** For a more comprehensive understanding of object setting performance, you could consider adding the following alternative: 3. **Array**: Using an array to store values would also be a viable option, as arrays can be used with both string keys and integer values. Keep in mind that this benchmark is focused on comparing two specific approaches and might not provide a complete picture of JavaScript's object setting performance. I hope this explanation helps!
Related benchmarks:
Map.prototype.forEach vs Array.prototype.forEach
Map.forEach vs Array.forEach vs Array.from(Map.prototype.values()).forEach
Map.forEach vs Array.forEach vs Array.from(Map.values()).forEach
creating maps vs creating objects
Object.fromEntries vs Map
Comments
Confirm delete:
Do you really want to delete benchmark?