reduce memory consumption

Author: BurkeHulk

.github/workflows/run_chatgpt_unit_tests.yml

@@ -30,6 +30,10 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Install ChatGPT
+        env:
+          CFLAGS: "-O0"
+          CXXFLAGS: "-O0"
+          MAX_JOBS: 4
         run: |
           cd applications/ColossalChat
           pip install -v .