ESP32-S3 super slow download speed (basd on wifi_embassy_bench)

[ChocolateLoverRaj]

I got a ESP32-S3 from AliExpress (maybe this is why). I got 757 kB/s upload, but only 78 kB/s download. I tried 2 different computers for the server and they both have really fast wifi speeds. Even when I moved both the ESP32-S3 and the laptop super close to the wifi router, I still only got 126 kB/s download. For my use case I need at least 800 kB/s download.

• Is this a software thing?
• Is it a normal speed for ESP32-S3?
• Is it because I got it from AliExpress and it was not properly made?

[bjoernQ]

The default settings are quite conservative, but you can change settings to optimize for throughput

See https://docs.esp-rs.org/esp-hal/esp-wifi/0.11.0/esp32s3/esp_wifi/#additional-configuration for what you can change.

You need to experiment and benchmark but settings like this should make a difference:

rx_queue_size = 20
tx_queue_size = 5
static_rx_buf_num = 32
dynamic_rx_buf_num = 16
ampdu_rx_enable = 1
ampdu_tx_enable = 1
rx_ba_win = 32
max_burst_size = 8