Any benchmark to evaluate GCC optimizations performance??

[Juan Castillo]

Hello everyone. This is the first time I write something in a forum. I
apologize if I make something wrong.

I am trying to evaluate the impact of compiler optimizations in the machine
code obtained (more specific, in the number of instructions necessary to
execute a program). I am very new about compiler theory, so analyzing gcc
source code is very far of my understanding (but really far...) :-)

I would like to know if there is a set of benchmarks that I could run and
get a gain percentage between compile without optimizations and compile with
them. It has not to be an exact value, but an estimation (for example,
40-50%). Any other solution or suggest to my problem will be welcome.

Thank you very much.
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