Precomplile Rust fixture for massive test speedup

Fixes #557

.gitignore

@@ -15,6 +15,7 @@ test/golang/schema-from-schema.json
 test/elm/elm-stuff/
 test/elm/elm.js
 test/elm/QuickType.elm
+test/fixtures/rust/target
 
 *.log
 /test/elm/libsysconfcpus/

test/fixtures/rust/Cargo.toml

@@ -11,4 +11,8 @@ doc = false
 [dependencies]
 serde_json = "1.0"
 serde = "1.0"
-serde_derive = "1.0"
+serde_derive = "1.0"
+
+# The development profile, used for `cargo build`
+[profile.dev]
+codegen-units = 1 # Controls whether the compiler passes `-C codegen-units`

test/languages.ts

@@ -73,9 +73,10 @@ export const JavaLanguage: Language = {
 export const RustLanguage: Language = {
   name: "rust",
   base: "test/fixtures/rust",
-  compileCommand: "cargo build",
+  setupCommand: "cargo build || true",
+  compileCommand: "cargo build --jobs 1",
   runCommand(sample: string) {
-    return `./target/debug/quick_type_test "${sample}"`;
+    return `RUST_THREADS=1 ./target/debug/quick_type_test "${sample}"`;
   },
   // FIXME: implement comparing multiple files
   diffViaSchema: false,