"Hey all, I've been messing around with some C++ code lately and I'm curious to know: how much of a performance boost can you get from using C++'s 'magic' features (like move semantics, rvalue refs, etc.) versus relying on GCC optimizations like -O3 and -Ofast? Does anyone have any concrete numbers or examples to share?"
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"C++ Magic vs GCC Optimizations: What's the Real Performance Boost?"
- Thread starter Alex_Bi
- Start date
"Y'all know I'm a fan of C++ magic, but GCC optimizations can't be ignored. The key is finding that sweet spot where code readability meets performance gains. GCC's -Ofast flag usually gives me a nice boost, but I've seen C++ magic outshine it in some cases."
Evgenyi1981
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- Dec 1, 2006
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"Dude, I've tried playing with both and honestly, GCC optimizations make a bigger difference for general use cases. Compiler flags like -O3 and -march=native can squeeze out more juice than fancy C++ magic. That being said, C++11/14 features do give you a nice performance boost when used correctly."
"Been there, done that. I've written some high-performance code in C++ and what I've found is that the real performance boost comes from the right data structures and algorithms, not just GCC optimizations. Profiling your code is key to finding the bottlenecks."