Speed improvement?

[lianalancealot]

Adding EC_GROUP_precompute_mult appears to improve performance 5x/6x as precomputations are made for the generator point of the curve.

group = EC_GROUP_new_by_curve_name ( NID_secp256k1 );
if (group == NULL ) {
printf ( "error %d\n", LINE );
exit(1);
}
BN_CTX *ctx = BN_CTX_new();
BN_CTX_start( ctx );
EC_GROUP_precompute_mult( group , ctx);

However, adding this and it appears to be generating duplicates, say 10-20 dupes in a set of 5-10 million vanity addresses. Any ideas?

[alexanderkent]

That should speed it up but probably would need to implement the openssl threading methods i.e.:

void pthreads_locking_callback(int mode, int type, char *file, int line);

void thread_cleanup(void);

unsigned long pthreads_thread_id(void);

See: http://stackoverflow.com/questions/3919420/tutorial-on-using-openssl-with-pthreads

[lianalancealot]

Just getting duplicates 👎 otherwise this bitkeygen is really cool and works.

[ShaliDaliHaliDa]

The function EC_GROUP_precompute_mult stores multiples of the generator for faster point multiplication, whilst EC_GROUP_have_precompute_mult tests whether precomputation has already been done. See EC_GROUP_copy for information about the generator.

https://www.openssl.org/docs/crypto/EC_GROUP_have_precompute_mult.html

does that help?

[ShaliDaliHaliDa]

Maybe Mr. Reds could take a look?