Hello, thanks for the reply.
I can't compile with CONFIG_DATA_OCRAM (I guess because I'm using version 2.0.0 and not the last of Zephyr). I will try to update it but my main problem is another.
My final goal is a comparison between my bare-metal webserver (using raw lwip + mbedtls) and a webserver created with Zephyr (using sockets).
I don't understand why the bare-metal version is much faster than the zephyr version. The example "samples/net/sockets/dumb_http_server" takes about 350ms to serve a request. I thought it was because of the external SDRAM but using it in my bare metal, the performance doesn't drop so much.
In the bare-metal version, HTTP requests are much faster than HTTPS (as I expected).
On Zephyr, HTTP requests take 350ms while HTTPS are very variable but often they are even less than 350ms! (I can't explain the reason).
Do you have any idea of the reason?
I apologize for the off-topic, if it is a problem I will create a different discussion.