github.com/cockroachdb/tools@v0.0.0-20230222021103-a6d27438930d/go/ssa/testdata/src/README.txt (about)

     1  These files are present to test building ssa on go files that use signatures from standard library packages.
     2  
     3  Only the exported members used by the tests are needed.
     4  
     5  Providing these decreases testing time ~10x (90s -> 8s) compared to building the standard library packages form source during tests.