Optimal configuration for https client

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I have simple web-site base on Apache with SSL based on self-signed certificate. And I want to write simple https client much like the one from examples.

What are the optimal parameters in menuconfig to reduce memory use as much as possible? Because right know SSL subsystem eats about 80K of RAM
(e.g. do I need all versions of TLS protocol, all versions of ciphers, etc..?)

BTW, SSL subsystem eats memory but in case fo error (mbedtls_ssl_handshake returned -0x2700) memory is not freed back