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2016 Oct 12
4
Can LLVM emit machine code faster with no optimization passes?
Hello, Recently Jonathan Blow posted a short screencast discussing build time of his compiler with when no optimizations are run on the user's code. Part 1: https://www.youtube.com/watch?v=HLk4eiGUic8 Part 2: https://www.youtube.com/watch?v=mIjGYbol0O4 He discusses what parts are taking the longest to compile, and the ultimately shows this: http://i.imgur.com/BkbKcJK.png ...which shows that emitting LLVM IR in memory and LLVMTargetMachineEmitToFile is the bottleneck in his compiler toolchain....