1## 8.2\. File I/O Access Performance 2 3Providing a common baseline for a consistent file access performance on the 4application private data storage (`/data` partition) allows app developers 5to set a proper expectation that would help their software design. Device 6implementations, depending on the device type, MAY have certain requirements 7described in [section 2](#2_device-type) for the following read 8and write operations: 9 10* **Sequential write performance**. Measured by writing a 256MB file using 1110MB write buffer. 12* **Random write performance**. Measured by writing a 256MB file using 4KB 13write buffer. 14* **Sequential read performance**. Measured by reading a 256MB file using 1510MB write buffer. 16* **Random read performance**. Measured by reading a 256MB file using 4KB 17write buffer. 18