From b586f2cb986821dae7816afa732f516b546bd6bd Mon Sep 17 00:00:00 2001
From: Alan Guo Xiang Tan <gxtan1990@gmail.com>
Date: Mon, 26 Aug 2024 08:42:35 +0800
Subject: [PATCH] DEV: Don't hardcode number of parallel processes for QUnit
 (#28535)

---
 .github/workflows/tests.yml | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 873c70bb9c6..95074b58b56 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -73,11 +73,16 @@ jobs:
         if: matrix.build_type == 'system'
         run: apt remove -y chromium-driver chromium
 
-      - name: Halve PARALLEL_TEST_PROCESSORS
+      - name: Set PARALLEL_TEST_PROCESSORS for system tests
         if: matrix.build_type == 'system'
         run: |
           echo "PARALLEL_TEST_PROCESSORS=$(($(nproc) / 2))" >> $GITHUB_ENV
 
+      - name: Set QUNIT_PARALLEL for QUnit tests
+        if: matrix.build_type == 'frontend'
+        run: |
+          echo "QUNIT_PARALLEL=$(($(nproc) / 2))" >> $GITHUB_ENV
+
       - uses: actions/checkout@v4
         with:
           fetch-depth: 1
@@ -238,7 +243,7 @@ jobs:
 
       - name: Plugin QUnit
         if: matrix.build_type == 'frontend' && matrix.target == 'plugins'
-        run: QUNIT_WRITE_EXECUTION_FILE=1 QUNIT_PARALLEL=3 bin/rake plugin:qunit['*','1200000']
+        run: QUNIT_WRITE_EXECUTION_FILE=1 bin/rake plugin:qunit['*','1200000']
         timeout-minutes: 30
 
       - name: Theme QUnit
@@ -408,7 +413,8 @@ jobs:
 
       - name: Core QUnit
         working-directory: ./app/assets/javascripts/discourse
-        run: yarn ember exam --path /tmp/emberbuild --load-balance --parallel=5 --launch "${{ env.TESTEM_BROWSER }}" --write-execution-file --random
+        run: |
+          yarn ember exam --path /tmp/emberbuild --load-balance --parallel=$(($(nproc) / 2 + 1)) --launch "${{ env.TESTEM_BROWSER }}" --write-execution-file --random
         timeout-minutes: 15
 
       - uses: actions/upload-artifact@v4