Andreas Kling e6922c0d40 LibCrypto: Manage vector sizing manually in performance-critical places ...

Use Vector::resize_and_keep_capacity() to resize BigInt vectors to just
the right size without risking deallocation. Then do direct indexed
accesses to the underlying words (or use memset/memcpy.)

This gives a ~40% speed-up on the RSA tests in "test-crypto -t pk" :^)

2020-05-03 19:14:50 +02:00

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