Can I built petsc faster without MPI

.travis.yml

@@ -82,7 +82,7 @@ install:
 
   - if [[ "$TRAVIS_PYTHON_VERSION" == "3.8" ]]; then
       echo -e "MPI is $MPI";
-      export PETSC_CONFIGURE_OPTIONS='--with-batch';
+      export PETSC_CONFIGURE_OPTIONS='--with-batch --with-mpi=0';
       conda install mpi4py scipy mpich;
       pip install petsc petsc4py;
       conda install nlopt;