add TypeScript benchmarks.

.github/workflows/test.yml

@@ -247,3 +247,22 @@ jobs:
 
       - name: Type-check JSDocs code blocks
         run: npm run test:jsdocs
+
+  typescript-benchmarks:
+    name: TypeScript Benchmarks
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22.x
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run benchmarks
+        run: npm run bench:ts

package.json

@@ -47,6 +47,7 @@
   },
   "scripts": {
     "clean": "rm -rf dist & rm -rf test/node/dist & rm -rf test/browser/bundle.js & rm -rf helpers",
+    "bench:ts": "npm run build && cd ./test/ts-benchmarks && tsx ./index.ts",
     "test": "npm run build && npm run test:node:build && npm run test:node:run && npm run test:typings && npm run test:esmimports && npm run test:exports",
     "test:node:build": "tsc -p test/node",
     "test:node": "npm run build && npm run test:node:build && npm run test:node:run",
@@ -82,6 +83,7 @@
   ],
   "devDependencies": {
     "@arethetypeswrong/cli": "^0.17.0",
+    "@ark/attest": "^0.36.0",
     "@types/better-sqlite3": "^7.6.11",
     "@types/chai": "^4.3.17",
     "@types/chai-as-promised": "^7.1.8",

src/parser/select-from-parser.ts

@@ -11,19 +11,18 @@ export type SelectFrom<
   DB,
   TB extends keyof DB,
   TE extends TableExpressionOrList<DB, TB>,
-> =
-  TE extends ReadonlyArray<infer T>
-    ? SelectQueryBuilder<From<DB, T>, FromTables<DB, TB, T>, {}>
-    : TE extends keyof DB & string
-      ? // This branch creates a good-looking type for the most common case:
-        // selectFrom('person') --> SelectQueryBuilder<DB, 'person', {}>.
-        // ExtractTableAlias is needed for the case where DB == any. Without it:
-        // selectFrom('person as p') --> SelectQueryBuilder<DB, 'person as p', {}>
-        SelectQueryBuilder<DB, TB | ExtractTableAlias<DB, TE>, {}>
-      : // This branch creates a good-looking type for common aliased case:
-        // selectFrom('person as p') --> SelectQueryBuilder<DB & { p: Person }, 'p', {}>.
-        TE extends `${infer T} as ${infer A}`
-        ? T extends keyof DB
-          ? SelectQueryBuilder<DB & ShallowRecord<A, DB[T]>, TB | A, {}>
-          : never
-        : SelectQueryBuilder<From<DB, TE>, FromTables<DB, TB, TE>, {}>
+> = TE extends keyof DB & string
+  ? // This branch creates a good-looking type for the most common case:
+    // selectFrom('person') --> SelectQueryBuilder<DB, 'person', {}>.
+    // ExtractTableAlias is needed for the case where DB == any. Without it:
+    // selectFrom('person as p') --> SelectQueryBuilder<DB, 'person as p', {}>
+    SelectQueryBuilder<DB, TB | ExtractTableAlias<DB, TE>, {}>
+  : // This branch creates a good-looking type for common aliased case:
+    // selectFrom('person as p') --> SelectQueryBuilder<DB & { p: Person }, 'p', {}>.
+    TE extends `${infer T} as ${infer A}`
+    ? T extends keyof DB
+      ? SelectQueryBuilder<DB & ShallowRecord<A, DB[T]>, TB | A, {}>
+      : never
+    : TE extends ReadonlyArray<infer T>
+      ? SelectQueryBuilder<From<DB, T>, FromTables<DB, TB, T>, {}>
+      : SelectQueryBuilder<From<DB, TE>, FromTables<DB, TB, TE>, {}>

test/ts-benchmarks/index.ts

@@ -0,0 +1 @@
+import './selectFrom.bench.js'