forked from OSchip/llvm-project
101f37a1b3
TestCPP11EnumTypes is one of the most expensive tests on my system and takes around 35 seconds to run. A relatively large amount of that time is actually doing CPU intensive work it seems (and not waiting on timeouts like other slow tests). The main issue is that this test repeatedly compiles the same source files with different compiler defines. The test is also including standard library headers, so it will also build all system modules with the gmodules debug info variant. This leads to the problem that this test ends up compiling all system Clang modules 8 times (one for each subtest with a unique define). As the system modules are quite large, this causes that this test spends most of its runtime just recompiling all system modules on macOS. There is also the small issue that this test is starting and start-stopping the test process a few hundred times. This rewrites the test to instead just use a macro to instantiate all the enum types in a single source and uses global variables to test the values (which means there is no more need to continue/stop or even start a process). I kept running all the debug info variants (event though it doesn't seem really relevant) to keep this as NFC as possible. This reduced the test runtime by around 1.5 seconds on my system (or in relative numbers, the runtime of this test decreases by 95%). |
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| Unit | ||
| CMakeLists.txt | ||
| lit.cfg.py | ||
| lit.site.cfg.py.in | ||