I'm going wax poetically and say that there are a lot of things like GStreamer or the Javax stuff that's just going to be another library, and depending on what you're doing in Clojure it will run just the same. If you're designing something where your processing is happening with Clojure, it depends on how the JIT observes it and optimizes it, so mostly that stuff might be slower, but it also might be the same. Now, if you're really trying to push things, you could be doing all of it on the GPU, in which case it doesn't matter what language you use, your code on the CPU is just going to be uploading or otherwise managing the GPU work, so using C++ to do such things might not even matter given that the GLSL or whatever you're doing the GPU is compiled and running over there anyway. But as far as Clojure speed goes, the general feel I get is that it's generally slower than Java (for say a single thread, and especially interactively with the REPL) but still faster than C Python, but it also may surprise you with its transparent threading.
Comments
I'm going wax poetically and say that there are a lot of things like GStreamer or the Javax stuff that's just going to be another library, and depending on what you're doing in Clojure it will run just the same. If you're designing something where your processing is happening with Clojure, it depends on how the JIT observes it and optimizes it, so mostly that stuff might be slower, but it also might be the same. Now, if you're really trying to push things, you could be doing all of it on the GPU, in which case it doesn't matter what language you use, your code on the CPU is just going to be uploading or otherwise managing the GPU work, so using C++ to do such things might not even matter given that the GLSL or whatever you're doing the GPU is compiled and running over there anyway. But as far as Clojure speed goes, the general feel I get is that it's generally slower than Java (for say a single thread, and especially interactively with the REPL) but still faster than C Python, but it also may surprise you with its transparent threading.