https://ceres-solver.googlesource.com/ceres-solver/+/9364e31ee8dacbdd2c1689c4f74c291c5d7000f0/internal/ceres/generated_bundle_adjustment_tests/ba_iterschur_schurjacobi_auto_threads_test.cc
internal/ceres/generated_bundle_adjustment_tests/ba_iterschur_schurjacobi_auto_threads_test.cc -...
threads testinternalceresgeneratedbundle