test(parser): add benchmarks (#1612)

Co-authored-by: Rikki Schulte <[email protected]>

Author: 0xnmn

packages/graphql-language-service-parser/package.json

@@ -27,7 +27,18 @@
     "graphql": "^14.0.0 || ^15.0.0"
   },
   "devDependencies": {
-    "graphql-language-service-types": "^1.6.1",
+    "@types/benchmark": "^1.0.33",
+    "benchmark": "^2.1.4",
+    "lodash": "^4.17.15",
+    "platform": "^1.3.5",
+    "ts-node": "^8.10.2",
     "vscode-languageserver-types": "3.15.1"
+  },
+  "dependencies": {
+    "graphql-language-service-types": "^1.6.0",
+    "typescript": "^3.9.5"
+  },
+  "scripts": {
+    "benchmark": "ts-node src/benchmark/index.ts"
   }
 }