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Memory vs Local vs Session
(version: 0)
Comparing performance of:
Local vs Session vs Control
Created:
3 years ago
by:
Guest
Go to the latest result
Tests:
Local
localStorage.setItem('foo', 'bar')
Session
sessionStorage.setItem('foo', 'bar')
Control
var foo = 'bar'
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
Local
Session
Control
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
6 months ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36 Edg/144.0.0.0
Browser/OS:
Chrome 144 on Windows
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=624389" width="100%" height="500px"></iframe>
Control
42.7M/s
Local
115K/s
Session
112K/s
View exact numbers
Test name
Executions per second
✓
Control
42,693,352 Ops/sec
Local
114,942 Ops/sec
Session
112,216 Ops/sec
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 three different approaches to storing data in memory: `localStorage`, `sessionStorage`, and native variable storage (`var`). **Options compared:** * **LocalStorage**: Stores data in a user's browser session, tied to their browsing context. The data persists even after the page has closed. * **SessionStorage**: Similar to LocalStorage, but with some key differences (more on that later). It also stores data in the user's browser session and persists even after the page has closed. * **Native Variable Storage (`var`)**: Stores data in native JavaScript variables, which are stored in memory. This type of storage is not persisted across sessions. **Pros and Cons of each approach:** * **LocalStorage**: + Pros: - Data is persisted across sessions - Easier to access from multiple pages or domains + Cons: - Can be slower due to security restrictions (e.g., limited access to native APIs) - More prone to storage leaks (accidentally storing large amounts of data) * **SessionStorage**: + Pros: - Faster than LocalStorage, as it has fewer security restrictions - Still persists across sessions, but is cleared when the session ends + Cons: - Limited access to native APIs due to security restrictions - May not be compatible with older browsers * **Native Variable Storage (`var`)**: + Pros: - Fastest and most reliable option - No security restrictions, making it ideal for certain use cases + Cons: - Data is lost when the session ends (or the browser closes) - Can be more challenging to manage data across multiple pages or domains **Library:** * **none**: This benchmark does not rely on any external libraries. **Special JavaScript feature or syntax:** * None are mentioned in this specific benchmark. However, if you're interested in learning about other features and their implications for performance, feel free to ask! **Other alternatives:** If you're looking for alternative storage mechanisms, consider the following: * **IndexedDB**: A more advanced, client-side database that allows for structured data storage. * **Web Storage APIs (IndexedDB-like)**: More modern and efficient than traditional LocalStorage and SessionStorage. * **Native Storage Mechanisms**: Depending on your use case, you might need to resort to native mechanisms like file system storage or cache-based storage. Keep in mind that the choice of storage mechanism depends on your specific requirements, performance needs, and compatibility constraints.
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