SD card read/write extremely slow with version 2.0.2

[boeckhoff]

Board

Adafruit ESP-32 Feather

Device Description

Feather is connected to a SD card module through jumper wires

Hardware Configuration

nothing

Version

v2.0.2

IDE Name

Arduino IDE (up to date)

Operating System

Windows 10

Flash frequency

80Mhz

PSRAM enabled

no

Upload speed

921600

Description

When using the new version of the core (2.0.2) I get extremely slow SD card read/write speeds (1048576 bytes read for 829442 ms !!). With the same hardware and the 1.0.6 core I get 2640 ms for the same data read.

I reproduced this multiple times with both the Arduino IDE and platformio and 2 types of SD card modules.

Sketch

SD-Test sketch for ESP32

Debug Message

With [email protected]

[..other info..]
1048576 bytes read for 829442 ms
1048576 bytes written for 216050 ms

With [email protected]

[..other info..]
1048576 bytes read for 2640 ms
1048576 bytes written for 9652 ms

I have checked existing issues, online documentation and the Troubleshooting Guide

• I confirm I have checked existing issues, online documentation and Troubleshooting guide.

[mrengineer7777]

Duplicate of #6295. Should be fixed in arduino-esp32 v2.0.3. See also workarounds in #6295. v2.0.3 should be released soon.

Duplicate #6338

[VojtechBartoska]

closing, thanks for linking a solution @mrengineer7777!