Storage Read/Write Test

Storage Read/Write Test - Test Your Disk Performance

A comprehensive online storage speed testing tool that measures browser storage performance using IndexedDB and localStorage. Run tests for write speed, read speed, and large file handling to evaluate your system's storage performance and browser database efficiency.

How does storage speed testing work?

Storage speed testing measures browser storage performance by executing read and write operations:

1. IndexedDB Write: Tests writing multiple items to IndexedDB
2. IndexedDB Read: Measures reading data from IndexedDB
3. localStorage Write: Tests writing to localStorage (smaller dataset)
4. localStorage Read: Measures reading from localStorage
5. Large File Handling: Tests handling of large data blobs (10MB)

Each test calculates speed (MB/s) and latency (ms per operation), with higher speeds and lower latency indicating better performance.

What is IndexedDB vs localStorage?

IndexedDB and localStorage are browser storage systems with different characteristics:

localStorage:
- Simple key-value storage
- Synchronous API (blocks execution)
- Limited to ~5-10MB
- Good for small data
- String storage only

IndexedDB:
- Full database with indexes
- Asynchronous API (non-blocking)
- Much larger storage (50MB+)
- Good for large datasets
- Can store complex objects
- Better performance for large data

This test measures both to show their relative performance characteristics.

What affects storage speed?

Several factors influence browser storage performance:

- Disk Type: SSD >> HDD
- Disk Speed: NVMe > SATA SSD > HDD
- Available Space: Full disks are slower
- Browser Implementation: Different browsers have different storage engines
- Operating System: File system and caching affects speed
- Background Processes: Other disk I/O slows performance
- RAM: More RAM allows better caching

For accurate results, close other applications and ensure sufficient free disk space.

What is a good storage speed score?

Understanding your storage speed results:

Typical speeds by storage type:
- NVMe SSD: 50-200+ MB/s
- SATA SSD: 20-100 MB/s
- Fast HDD (7200 RPM): 5-20 MB/s
- Slow HDD (5400 RPM): 2-10 MB/s
- Mobile Storage: 10-50 MB/s

Note: These are browser storage speeds, not raw disk speeds. Browser overhead and JavaScript limitations mean these speeds are typically 10-100x slower than native disk speeds.

Lower latency (under 1ms) is also important for responsive applications.

Why test browser storage?

Browser storage testing is valuable because:

- Web App Performance: Shows how fast web applications can store/retrieve data
- Progressive Web Apps (PWAs): Critical for offline-capable apps
- Browser Caching: Affects page load times
- Debugging: Identify storage bottlenecks
- Comparison: Compare different browsers and devices

While this doesn't test raw disk speed, it shows real-world performance for web applications that rely on browser storage APIs.

Key Features

• 5 comprehensive storage speed tests
• IndexedDB write and read benchmarks
• localStorage write and read tests
• Large file (10MB) handling test
• Speed measurement in MB/s
• Latency measurement in milliseconds
• Storage quota and usage display
• Average write and read speed calculation
• Individual test timing and scoring
• Visual progress indicators
• Stop test anytime
• Automatic cleanup after tests
• 100% client-side - no data uploaded
• Works offline
• Mobile and desktop support
• Dark mode compatible