Signed-off-by: Xie Zhihao [email protected]

Commit Message: cryptomb: reduce memory copy in ECDSA
Additional Description:

The original implementation serializes signatures into a temporary output buffer during processing phase and then copy to the BoringSSL buffer in the completion phase. This patch change the way and directly serializes signatures to the BoringSSL buffer.

In addition, the patch adds a speed test to track the performance change by mathematical implementation of private key provider.

Risk Level: Low
Testing: N/A
Docs Changes: N/A
Release Notes: N/A
Platform Specific Features: Requires AVX512 or equivalent CPU instruction set

Request variables

Key	Value
ref	137962d13b869973e019707f53043b633dfb0206
sha	068f576
pr	33201
base-sha	d6a696d
actor	@zhxie
message	cryptomb: reduce memory copy in ECDSA...
started	1711695364.460553
target-branch	main
trusted	false

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