💚 Increase CI parallel build to 3 threads

.gitlab-ci.yml

@@ -12,7 +12,7 @@ build:
     - mkdir build
     - cd build
     - cmake -DCMAKE_BUILD_TYPE=Release ../src
-    - make
+    - make -j 3
     # clean up unnecessary files and strip binaries
     - rm -rf _deps *tree generated
     - strip bench/point bench/scan bench/tree_* test/*Test
@@ -42,7 +42,7 @@ coverage:
     - mkdir build
     - cd build
     - cmake -DCMAKE_BUILD_TYPE=Debug -DCMAKE_CXX_FLAGS="-g -O0 -fprofile-arcs -ftest-coverage" ../src
-    - make
+    - make -j 3
     - echo pass | sudo -S mkdir -m 777 -p /mnt/pmem/test
     - ctest
     - ~/.local/bin/gcovr -r .. --exclude _deps