From 71b837b4c8bb96a217b9873d12dfe36360996863 Mon Sep 17 00:00:00 2001
From: David de Boer <david@ddeboer.nl>
Date: Wed, 26 Jun 2024 20:32:43 +0200
Subject: [PATCH] fix: Improve CONSTRUCT performance by prepending URIs (#92)

---
 jest.config.js   | 6 +++---
 src/generator.ts | 3 ++-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/jest.config.js b/jest.config.js
index 243a948..0e1ecfd 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -11,10 +11,10 @@ export default {
   coverageReporters: ['json-summary', 'text'],
   coverageThreshold: {
     global: {
-      lines: 67.89,
-      statements: 68.24,
+      lines: 68.16,
+      statements: 68.5,
       branches: 64.36,
-      functions: 74.4,
+      functions: 75,
     },
   },
   transform: {
diff --git a/src/generator.ts b/src/generator.ts
index 392b728..51a1547 100644
--- a/src/generator.ts
+++ b/src/generator.ts
@@ -131,12 +131,13 @@ export class Query extends BaseQuery {
 
   public withIris(iris: NamedNode[]) {
     const query = clonedeep(this.query);
+    // Increase Comunica query performance by inserting the VALUES as the first element in the query’s WHERE clause.
     const patterns: Pattern[] = [
-      ...(query.where ?? []),
       {
         type: 'values',
         values: iris.map($this => ({'?this': $this})),
       },
+      ...(query.where ?? []),
     ];
     query.where = [{type: 'group', patterns}];