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Map.set vs Object assign
(version: 0)
Comparing performance of:
Map vs Object
Created:
3 years ago
by:
Guest
Go to the latest result
Script Preparation code:
map = new Map() obj = {}
Tests:
Map
map.set("foo", "bar")
Object
obj["foo"] = "bar"
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Map
Object
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:138.0) Gecko/20100101 Firefox/138.0
Browser/OS:
Firefox 138 on Windows
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=599254" width="100%" height="500px"></iframe>
Object
372.0M/s
Map
15.7M/s
View exact numbers
Test name
Executions per second
✓
Object
371,997,792 Ops/sec
Map
15,678,805 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of MeasureThat.net and explore what's being tested in this specific benchmark. **Benchmark Overview** The benchmark compares the performance of two approaches: `map.set()` (using JavaScript's built-in `Map` data structure) and assigning values to an object using dot notation (`obj[foo] = 'bar'`). The goal is to determine which approach is faster. **Options Compared** There are two options being compared: 1. **`map.set('foo', 'bar')`**: This method uses the `Map` data structure to store key-value pairs. In this case, it sets the value of a key named "foo" to the string "bar". 2. **`obj[foo] = 'bar'`**: This approach uses dot notation to assign values to an object (`obj`). The value of the property with the name "foo" is set to the string "bar". **Pros and Cons** **`map.set()`:** Pros: * Can efficiently store and retrieve large amounts of data using a hash table. * Allows for fast lookups and updates. Cons: * Requires JavaScript's built-in `Map` data structure, which may not be supported in older browsers or environments with limited JavaScript capabilities. **`obj[foo] = 'bar'`:** Pros: * Is widely supported across most modern browsers and JavaScript engines. * Does not require the use of a specific library or data structure. Cons: * May be slower for large datasets due to the overhead of property lookups and assignments. **Other Considerations** * The benchmark uses a simple object (`obj`) as the target for assignment, which may affect the results. * There is no consideration for caching or memoization in either approach. **Library and Special JS Feature** The `Map` data structure is a built-in JavaScript feature introduced in ECMAScript 2015 (ES6). It provides a powerful way to store key-value pairs and has become a standard part of modern web development. **Test Case Analysis** Looking at the individual test cases, we can see that: * The first test case uses `map.set()` to set a value in a `Map` data structure. * The second test case uses dot notation (`obj[foo] = 'bar'`) to assign a value to an object. **Alternative Approaches** Other approaches could be used to compare performance, such as: * Using a different data structure like an array or a set * Implementing custom caching or memoization mechanisms * Comparing the performance of other assignment methods (e.g., `map.set()` with additional arguments) * Using a profiling tool to analyze memory allocation and garbage collection patterns
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