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Switch vs object mapping
(version: 0)
Comparing performance of:
object vs Switch
Created:
2 years ago
by:
Guest
Go to the latest result
Tests:
object
const mapping = { 0: true, 1: true, 2: true, 3: true, 4: true, 5: true, 6: true, 7: true, 8: true, 9: true, 10: true, }; const foo = mapping[2];
Switch
switch(2) { case 1: return true; case 2: return true; case 3: return true; case 4: return true; case 5: return true; case 6: return true; case 7: return true; case 8: return true; case 9: return true; case 10: return true; default: return 11; }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
object
Switch
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
8 months ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36 Edg/142.0.0.0
Browser/OS:
Chrome 142 on Windows
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=620718" width="100%" height="500px"></iframe>
Switch
145.8M/s
object
144.8M/s
View exact numbers
Test name
Executions per second
✓
Switch
145,779,424 Ops/sec
object
144,808,928 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll provide an explanation of the benchmark and its test cases, as well as some additional context. **Benchmark Overview** The MeasureThat.net benchmark compares the performance of two approaches: object-based mapping and switch statement-based lookup in JavaScript. The benchmark aims to determine which approach is more efficient for a specific use case. **Test Cases** There are only two test cases: 1. **"object"`**: This test case uses an object literal (`const mapping = { ... }`) to define a mapping between indices and values. The `foo` variable is then assigned the value of `mapping[2]`. This approach relies on the JavaScript engine's ability to perform lookup operations using objects. 2. **"Switch "`**: This test case uses a switch statement to achieve the same lookup operation as in the "object" test case. The code uses multiple cases to cover various values, and the `foo` variable is assigned the value of `switch(2)`. This approach relies on the JavaScript engine's ability to execute a switch statement. **Options Compared** The benchmark compares two options: 1. **Object-based mapping**: This approach uses an object literal to define the mapping between indices and values. 2. **Switch statement-based lookup**: This approach uses a switch statement to achieve the same lookup operation as in the "object" test case. **Pros and Cons of Each Approach** Here's a brief analysis of each approach: * **Object-based mapping**: + Pros: Generally more efficient than switch statements, especially for larger datasets. + Cons: Requires an object literal definition, which can be less readable for some developers. * **Switch statement-based lookup**: + Pros: Can be more readable and concise for small to medium-sized lookup tables. + Cons: Less efficient than object-based mapping for large datasets. **Library and Special JS Feature** There is no explicit library mentioned in the benchmark, but it's likely that the JavaScript engine being tested (e.g., V8) provides built-in support for objects and switch statements. No special JS feature or syntax is used in this benchmark. However, it's worth noting that some JavaScript engines might optimize certain features differently. **Alternative Approaches** Other alternatives could be explored: * **Array-based lookup**: Using an array to store the mapping values and indexing into it using `arr[index]`. * **Map data structure**: Using a `Map` object (introduced in ECMAScript 2015) to define the mapping between indices and values. * **Custom implementation**: Writing a custom JavaScript function or method to perform the lookup operation. Keep in mind that these alternatives might not be relevant to this specific benchmark, which focuses on comparing object-based mapping with switch statement-based lookup.
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