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Storage performance
Sequential read
MiB/s · higher is fasterB is 3.07% lower than A
Sequential write
MiB/s · higher is fasterB is 50.96% lower than A
4 KiB random read
MiB/s · higher is fasterB is 4.78% higher than A
4 KiB random write
MiB/s · higher is fasterB is 21.91% lower than A
Configuration details
| Detail | A · iPhone XR(iPhone11,8) · 512 GB | B · iPad Pro 11-inch Wi-Fi(iPad8,1) · 64 GB |
|---|---|---|
| Platform | iOS | iOS |
| Sample count | 55 | 142 |
| Latest measurement | 2026-02-16 | 2026-04-03 |
| Random read IOPS | 5,475 | 5,737 |
| Random write IOPS | 4,359 | 3,404 |
| All capacities | View Model → | View Model → |
Results checked · Speeds in MiB/s · About these measurements
Four tests. A clearer comparison.
Compare sequential and 4 KiB random read/write speeds side by side. Every option includes its Model, capacity and platform. You can compare 512 GB with 256 GB, including two capacities of the same Model.