How to set that compiler flag?
- by mystify
Shark told me this:
This instruction is the start of a
loop that is not aligned to a 16-byte
address boundary. For optimal
performance, you should align the
start of a hot loop using a compiler
directive. With gcc 3.3 or later, use
the -falign-loops=16 compiler flag.
for (int i=0; i < 4; i++) { // line with the info
//...code
}
How would I set that flag, and does it really improve performance?
