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Storage performance
Sequential read
MiB/s · higher is fasterB is 0.12% lower than A
Sequential write
MiB/s · higher is fasterB is 47.91% higher than A
4 KiB random read
MiB/s · higher is fasterB is 9.39% lower than A
4 KiB random write
MiB/s · higher is fasterB is 3.55% higher than A
Configuration details
| Detail | A · iPad Pro (11-inch) (2nd generation) Wi-Fi(iPad8,9) · 128 GB | B · iPhone 8(iPhone10,4) · 256 GB |
|---|---|---|
| Platform | iOS | iOS |
| Sample count | 141 | 24 |
| Latest measurement | 2026-06-12 | 2026-04-03 |
| Random read IOPS | 5,690 | 5,156 |
| Random write IOPS | 3,920 | 4,060 |
| 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.