bitcoin/secp256k1 — pull request #20 by peterdettman (2014-05-22 03:55:36+00:00)
Title: Use endomorphism in precomputations

The secp256k1 endomorphism is very efficient (a single field multiplication), so when using the endomorphism in a scalar multiplication of point P, the lambda-P precomputation table can be generated much more quickly by simply applying the endomorphism to the P precomputation table (instead of precomputing from lambda-P).