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Apparently nobody evaluated multiprocessing on Windows since Daniel enabled multiprocessing on Unix in r193279. It works so far as I can tell. Today this is worth about an 8x speedup (631.29s to 73.25s) on my 24 core Windows machine. Hopefully this will improve Windows buildbot cycle time, where currently it takes more time to run check-all than it does to self-host with assertions enabled: http://lab.llvm.org:8011/builders/clang-x86-windows-msvc2015/builds/20 build stage 2 ninja all ( 28 mins, 22 secs ) ninja check 2 stage 2 ( 37 mins, 38 secs ) llvm-svn: 280382
=============================== lit - A Software Testing Tool =============================== lit is a portable tool for executing LLVM and Clang style test suites, summarizing their results, and providing indication of failures. lit is designed to be a lightweight testing tool with as simple a user interface as possible.