(03-11-2012, 06:11 AM)scummos Wrote:Quote: Often times direct3d is going to be much faster than openGL even if you spend loads of times optimizing both backendsand often it will be the other way around.
Greetings,
Sven
Ok.....that directly contradicts what you said earlier. If direct3d can be much faster than openGL or the other way around depending on what you're doing (which you just admitting is true) than that means that you're not always going to be able to get the same performance on both even with proper optimization. Depending on the task that you're trying to accomplish it may run much faster on one than the other.
Quote:For example, dolphin is compiled with msvc on windows and with g++ on linux. That definitely is a significant difference. Of course there's many cases where it won't matter, but there's definitely cases where it *does* matter. Even in my 3-line-test program here I can easily see that virtual function calls are faster in clang++ than in g++, and dynamic_casts are faster in g++ than in clang++. I don't have msvc here for testing, but I'm *absolutely* sure there will also be differences.
Yes, but it's not enough to make a sigificant difference to large projects. The standard compilers and kernels for all three major x86 OS for c++ for example are all so well optimized that you're unlikely to see more than a few percent worth of difference in performance, if you see any at all, unless:
1. You're using different frameworks
2. The drivers are playing a major role (GPU stuff for example)
3. You're writing some BS synthetic test to measure only one or two specific operations instead of a practical application.
Without any of these three things it's borderline impossible to write an application that performs very well in one OS and very poorly in another, depending on the programming language (some uncommon programming languages may have very bad compilers for a particular OS, but all major programming languages should have resources that are so well optimized on all three OS that they perform nearly identically in all three environments, with the exception of java on android).
Quote:Does Dolphin have Cocoa? Everyone seems to hate obj C so I'd say its possible any Win32 code is better than its Cocoa counterpart.
I'm fairly sure the answer is no. And yes everyone does hate obj C and cocoa.
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