The big exponential thing was ironically Hash which was being called for memo which existed to prevent exponential behavior. Reimplmenented the caching hash, and much much faster. Still some failing tests, and bvau might be looping

kr/Cargo.toml

@@ -6,6 +6,10 @@ build = "build.rs"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
+
+[profile.bench]
+debug = true
+
 [dependencies]
 lalrpop-util = {version="0.19.7", features=["lexer"]}
 regex = "1"