Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
Can anybody provide some data showing the performance of code output by llvm’s JIT, say compared to static compilation with -O3? It is better that such performance is illustrated by spec benchmark. People say code output by JIT is slow. I am just curious how slow it is.
Give this presentation a read, it covers benchmarks of the JIT generated code (for a JVM & .Net though, unfortunately, most benchmarks will for existing languages with a new JIT backend, such as Rubinius). There are also a few interesting graphs here.
As an added bonus, here is a presentation on building an efficient JIT with LLVM and Clang that covers memory usage and speed benchmarks of the JITing process, which can affect the speed and quality of generated code, if you do decide to create your own benchmarks.
However, you might find this question interesting as well.