RGBCube/uutils-coreutils
1
Fork 0
mirror of https://github.com/RGBCube/uutils-coreutils synced 2025-08-04 23:17:46 +00:00
Code Issues Activity

factor::factor: Use u64::trailing_zero instead of iterated division

Browse source 
No significant performance impact (most of the time is spent elsewhere),
but an easy and satisfying fix nevertheless.
This commit is contained in:
nicoo 2020-05-24 15:41:23 +02:00
parent a1b2522750
commit bc11e57962
1 changed files with 4 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

7
src/uu/factor/src/factor.rs
View file

@ -83,9 +83,10 @@ fn factor(mut n: u64) -> Factors {
return factors; return factors;
} }
while n % 2 == 0 { let z = n.trailing_zeros();
n /= 2; if z > 0 {
factors.push(2); factors.add(2, z as u8);
n = n >> z;
} }
if n == 1 { if n == 1 {