What optimization levels maybe -O1 or -O2 are typically used for balancing performance and code size
In my energy system project using embedded Linux, I'm curious about the trade-offs between code size and performance using compiler optimizations. I noticed the
-O3 flag significantly reduces code size.
Is it a common practice to use compiler optimizations like -O3 in embedded Linux development, especially for energy systems?
What optimization levels maybe -O1 or -O2 are typically used for balancing performance and code size?
Please Great house,help me out 🙏🙏Solution:Jump to solution
@UC GEE
optimization levels like -O1 and -O2 are more used in embedded systems, they provide a good balance between code size reduction and performance improvement. They optimize the code by applying various techniques such as instruction scheduling, loop unrolling, and function inlining.
while
the -O3 optimization level do provide better performance improvements, I won't advise you use it in embedded systems due to the potential increase in code size. as larger code size can lead to higher memory usage and potentially impact the overall system's energy consumption....
4 Replies
Solution
@UC GEE
optimization levels like -O1 and -O2 are more used in embedded systems, they provide a good balance between code size reduction and performance improvement. They optimize the code by applying various techniques such as instruction scheduling, loop unrolling, and function inlining.
while
the -O3 optimization level do provide better performance improvements, I won't advise you use it in embedded systems due to the potential increase in code size. as larger code size can lead to higher memory usage and potentially impact the overall system's energy consumption.
Ok, Thanks @Enthernet Code for your awesome Advice
Especially for tight memory situations, even -O2 might be better.
Oh... Thanks @Marvee Amasi ...I think this your point is another salient point 🙌