Optimize Days 1-8: 41% faster overall (39ms → 23ms)

Cargo.lock

@@ -26,6 +26,7 @@ dependencies = [
  "itertools",
  "pico-args",
  "rayon",
+ "smallvec",
  "tinyjson",
 ]
 
@@ -422,9 +423,9 @@ dependencies = [
 
 [[package]]
 name = "smallvec"
-version = "1.11.2"
+version = "1.15.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4dccd0940a2dcdf68d092b8cbab7dc0ad8fa938bf95787e1b916b0e3d0e8e970"
+checksum = "67b1b7a3b5fe4f1376887184045fcf45c69e92af734b7aaddc05fb777b6fbd03"
 
 [[package]]
 name = "syn"