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+
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+checksum = "cf221c93e13a30d793f7645a0e7762c55d169dbb0a49671918a2319d289b10bb"
+dependencies = [
+ "windows-sys",
+]
+
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+name = "windows-sys"
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+ "windows-targets",
+]
+
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+name = "windows-targets"
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+dependencies = [
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_gnullvm",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
+name = "windows_aarch64_gnullvm"
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+checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
+
+[[package]]
+name = "wit-bindgen-rt"
+version = "0.39.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6f42320e61fe2cfd34354ecb597f86f413484a798ba44a8ca1165c58d42da6c1"
+dependencies = [
+ "bitflags",
+]
+
+[[package]]
+name = "zerocopy"
+version = "0.8.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1039dd0d3c310cf05de012d8a39ff557cb0d23087fd44cad61df08fc31907a2f"
+dependencies = [
+ "zerocopy-derive",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.8.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ecf5b4cc5364572d7f4c329661bcc82724222973f2cab6f050a4e5c22f75181"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]

Cargo.toml

@@ -1,3 +1,7 @@
 [workspace]
 resolver = "3"
-members = ["canvas"]
+members = ["canvas"]
+[profile.release]
+debug = "line-tables-only"
+[build]
+rustflags = ["-C", "force-frame-pointers=yes"]

canvas/Cargo.toml

@@ -4,4 +4,13 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
+arbitrary = "1.4.1"
 itertools = "0.14.0"
+
+[dev-dependencies]
+criterion = { version = "0.7", features = ["html_reports"] }
+rand = "0.9.2"
+
+[[bench]]
+name = "painting"
+harness = false

canvas/benches/painting.rs

@@ -0,0 +1,73 @@
+use arbitrary::{Arbitrary, Unstructured};
+use canvas::{Card, draw_painting};
+use criterion::{BenchmarkId, Criterion, criterion_group, criterion_main};
+use rand::{Rng, rngs::StdRng};
+use std::{hint::black_box, time::Duration};
+
+use crate::random_card::RandomCard;
+
+mod random_card;
+
+fn criterion_benchmark(c: &mut Criterion) {
+    let cards = vec![
+        Card::from_dbg_string(".ttt."),
+        Card::from_dbg_string("t.l.."),
+        Card::from_dbg_string("ll..pt"),
+    ];
+    assert_eq!(draw_painting(&cards, &[]), Some([0, 1, 2]));
+    c.bench_function("painting optimizer", |b| {
+        b.iter(|| {
+            draw_painting(&black_box(cards.clone()), &[]);
+        });
+    });
+}
+
+fn random_card_pool<const N: usize>(rng: &mut StdRng) -> Vec<Card> {
+    <[RandomCard; N] as Arbitrary>::arbitrary(&mut Unstructured::new(&rng.random::<[u8; 32]>()))
+        .unwrap()
+        .map(|x| x.0)
+        .to_vec()
+}
+
+fn from_elem(c: &mut Criterion) {
+    use rand::SeedableRng;
+    // Define a seed. This can be any value that implements the `SeedableRng` trait.
+    let seed: [u8; 32] = [
+        8u64.to_be_bytes(),
+        8u64.to_be_bytes(),
+        8u64.to_be_bytes(),
+        8u64.to_be_bytes(),
+    ]
+    .concat()
+    .try_into()
+    .unwrap();
+
+    // Create a new RNG with the specified seed.
+    let mut rng: StdRng = SeedableRng::from_seed(seed);
+    // Generate a random number using the seeded RNG.
+    let card_pool = [
+        random_card_pool::<4>(&mut rng),
+        random_card_pool::<8>(&mut rng),
+        random_card_pool::<16>(&mut rng),
+        random_card_pool::<32>(&mut rng),
+        random_card_pool::<64>(&mut rng),
+        random_card_pool::<128>(&mut rng),
+    ];
+
+    let mut group = c.benchmark_group("from_elem");
+    for size in card_pool.iter() {
+        group.bench_with_input(BenchmarkId::from_parameter(size.len()), size, |b, size| {
+            b.iter(|| {
+                draw_painting(&black_box(size.clone()), &[])
+            });
+        });
+    }
+    group.finish();
+}
+
+criterion_group!(name = benches;
+    config = Criterion::default()
+    .warm_up_time(Duration::from_millis(100))
+    .measurement_time(Duration::from_millis(500));
+     targets = criterion_benchmark, from_elem);
+criterion_main!(benches);

canvas/benches/random_card.rs

@@ -0,0 +1,30 @@
+use arbitrary::{Arbitrary, Unstructured};
+use canvas::{Card, CardField};
+
+#[derive(Debug, Clone)]
+pub struct RandomCard(pub(crate) Card);
+#[derive(Debug)]
+struct RandomCardField(CardField);
+
+impl<'a> Arbitrary<'a> for RandomCardField {
+    fn arbitrary(u: &mut Unstructured<'a>) -> arbitrary::Result<Self> {
+        let i = u.int_in_range(0..=15)?;
+        if let Ok(w) = CardField::try_from_bits(i) {
+            Ok(RandomCardField(w))
+        } else {
+            Ok(RandomCardField(CardField::Empty))
+        }
+    }
+}
+
+impl<'a> Arbitrary<'a> for RandomCard {
+    fn arbitrary(u: &mut Unstructured<'a>) -> arbitrary::Result<Self> {
+        let mut r = vec![];
+        for _ in 0..5 {
+            r.push(u.arbitrary::<RandomCardField>()?)
+        }
+        let w: [RandomCardField; 5] = r.try_into().unwrap();
+        let r = Card::from(w.map(|x: RandomCardField| x.0));
+        Ok(RandomCard(r))
+    }
+}

canvas/src/card.rs

@@ -20,7 +20,7 @@ impl Iterator for CardFieldIter {
             self.index += 1;
             let bitmask = (1 << (CardField::BITPACKED_SIZE as u8)) - 1;
             let result = (self.field >> (CardField::BITPACKED_SIZE as u8 * old_index)) & bitmask;
-            Some(CardField::from_bits(result as u8))
+            Some(CardField::try_from_bits(result as u8).unwrap())
         } else {
             None
         }

canvas/src/lib.rs

@@ -1,5 +1,5 @@
 #![allow(dead_code)]
-
+#![warn(clippy::unwrap_used, clippy::expect_used)]
 use crate::objective::Objective;
 
 mod card;
@@ -7,7 +7,9 @@ mod icon_bitfield;
 mod objective;
 mod optimizer;
 
-use card::Card;
+pub use card::Card;
+
+pub use optimizer::draw_painting;
 
 #[derive(Debug)]
 struct Shop {
@@ -46,25 +48,29 @@ pub enum CardField {
 }
 
 impl CardField {
-    const BITPACKED_SIZE: usize = 4;
-    fn from_bits(bits: u8) -> Self {
+    pub const BITPACKED_SIZE: usize = 4;
+    pub fn try_from_bits(bits: u8) -> Result<Self, ()> {
         {
-            if bits == 0b1111 {
-                Self::Empty
+            let bits = bits & ((1 << Self::BITPACKED_SIZE) - 1);
+            if (bits) == 0b1111 {
+                Ok(Self::Empty)
             } else if (bits & (1 << 3)) != 0 {
                 let bits = bits & ((1 << 3) - 1);
                 if bits == 5 {
-                    Self::DoubleIcon(Icon::Triangle, Icon::Color)
+                    Ok(Self::DoubleIcon(Icon::Triangle, Icon::Color))
                 } else if bits >= 3 {
-                    Self::DoubleIcon(Icon::Square, Icon::try_from(bits + 2 - 3).unwrap())
+                    Ok(Self::DoubleIcon(
+                        Icon::Square,
+                        Icon::try_from(bits + 2 - 3)?,
+                    ))
                 } else {
-                    Self::DoubleIcon(Icon::Circle, Icon::try_from(bits + 1).unwrap())
+                    Ok(Self::DoubleIcon(Icon::Circle, Icon::try_from(bits + 1)?))
                 }
             } else if bits & (1 << 2) != 0 {
                 let bits = bits & ((1 << 2) - 1);
-                Self::PointsPer(Icon::try_from(bits).unwrap())
+                Ok(Self::PointsPer(Icon::try_from(bits)?))
             } else {
-                Self::Icon(Icon::try_from(bits).unwrap())
+                Ok(Self::Icon(Icon::try_from(bits)?))
             }
         }
     }
@@ -139,7 +145,7 @@ impl PointThresholds {
 }
 
 #[derive(Debug)]
-struct CriteriaCard {
+pub struct CriteriaCard {
     objective: Objective,
     // Points depending on how often the criteria was met
     points: PointThresholds,

canvas/src/optimizer.rs

@@ -31,7 +31,7 @@ impl Iterator for OneIndexIterator {
     }
 }
 
-fn draw_painting(cards: &[Card], obj: &[(&CriteriaCard, u8)]) -> Option<[usize; 3]> {
+pub fn draw_painting(cards: &[Card], obj: &[(&CriteriaCard, u8)]) -> Option<[usize; 3]> {
     let bitfields = cards.iter().map(IconBitfield::new).collect::<Vec<_>>();
     let mut best: Option<([usize; 3], u8)> = None;
     for stack in (0..cards.len()).permutations(3) {
@@ -63,7 +63,6 @@ fn draw_painting(cards: &[Card], obj: &[(&CriteriaCard, u8)]) -> Option<[usize;
             .sum::<u8>();
         let total_points = bonus_points + criteria_points;
         let stack_result = (stack_indices, total_points);
-        dbg!(stack_result);
         if let Some(bp) = &mut best {
             if bp.1 < total_points {
                 *bp = stack_result;