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day7: slight performance improvement from skipping ThreadLoacls

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This commit is contained in:
Keenan Tims 2024-12-11 19:40:45 -08:00
parent 4c14c6092e
commit 31eb500832
Signed by: ktims
GPG Key ID: 11230674D69038D4
1 changed files with 2 additions and 5 deletions
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7
src/day7.rs
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@ -2,7 +2,6 @@ use aoc_runner_derive::{aoc, aoc_generator};
use itertools::Itertools; use itertools::Itertools;
use rayon::iter::{IntoParallelRefIterator, ParallelIterator}; use rayon::iter::{IntoParallelRefIterator, ParallelIterator};
use std::io::{BufRead, Lines}; use std::io::{BufRead, Lines};
use thread_local::ThreadLocal;
#[aoc_generator(day7)] #[aoc_generator(day7)]
pub fn get_input(input: &[u8]) -> Calibrations { pub fn get_input(input: &[u8]) -> Calibrations {
@ -43,7 +42,7 @@ impl Operator {
match self { match self {
Operator::Add => a + b, Operator::Add => a + b,
Operator::Multiply => a * b, Operator::Multiply => a * b,
Operator::Concatenate => u64::pow(10, u64::ilog10(b) + 1) * a + b, Operator::Concatenate => u64::pow(10, b.ilog10() + 1) * a + b,
} }
} }
} }
@ -84,14 +83,12 @@ impl Calibrations {
.par_iter() .par_iter()
.map(|cal| { .map(|cal| {
let n_opers = cal.numbers.len() - 1; let n_opers = cal.numbers.len() - 1;
let tl = ThreadLocal::new();
if operator_sets[n_opers] if operator_sets[n_opers]
.par_iter() .par_iter()
.find_any(|oper_set| Self::check_oper_set(cal, oper_set)) .find_any(|oper_set| Self::check_oper_set(cal, oper_set))
.is_some() .is_some()
{ {
let cal_local = tl.get_or(|| cal.clone()); return cal.result;
return cal_local.result;
} }
0 0
}) })