Qortal/pirate-librustzcash
1
0
Fork 1
mirror of https://github.com/Qortal/pirate-librustzcash.git synced 2025-08-01 12:51:30 +00:00
Code Issues Packages Projects Releases Wiki Activity

For performance, don't double/square until we've seen a bit.

Browse Source
This commit is contained in:
Sean Bowe
2017-07-09 21:11:29 -06:00
parent f2b1b0632d
commit b965c58ac1
2 changed files with 15 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
src/bls12_381/ec.rs
View File

@@ -475,9 +475,15 @@ macro_rules! curve_impl {
fn mul_assign<S: Into<<Self::Scalar as PrimeField>::Repr>>(&mut self, other: S) { fn mul_assign<S: Into<<Self::Scalar as PrimeField>::Repr>>(&mut self, other: S) {
let mut res = Self::zero(); let mut res = Self::zero();
let mut found_one = false;
for i in BitIterator::new(other.into()) for i in BitIterator::new(other.into())
{ {
res.double(); if found_one {
res.double();
} else {
found_one = i;
}
if i { if i {
res.add_assign(self); res.add_assign(self);

9
src/lib.rs
View File

@@ -219,8 +219,15 @@ pub trait Field: Sized +
{ {
let mut res = Self::one(); let mut res = Self::one();
let mut found_one = false;
for i in BitIterator::new(exp) { for i in BitIterator::new(exp) {
res.square(); if found_one {
res.square();
} else {
found_one = i;
}
if i { if i {
res.mul_assign(self); res.mul_assign(self);
} }