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Small optimization -- use mul_add instead of mul + add (#137)

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Daniel Lubarov 2021-07-30 09:03:23 -07:00 committed by GitHub
parent 50b07f2ceb
commit 94b85b0806
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1 changed files with 1 additions and 2 deletions
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src/plonk/plonk_common.rs
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@ -183,8 +183,7 @@ pub(crate) fn reduce_with_powers_ext_recursive<F: Extendable<D>, const D: usize>
) -> ExtensionTarget<D> { ) -> ExtensionTarget<D> {
let mut sum = builder.zero_extension(); let mut sum = builder.zero_extension();
for &term in terms.iter().rev() { for &term in terms.iter().rev() {
sum = builder.scalar_mul_ext(alpha, sum); sum = builder.scalar_mul_add_extension(alpha, sum, term);
sum = builder.add_extension(sum, term);
} }
sum sum
} }