Compare CSRs before and after the benchmark, compile with -O2

bench/Makefile

bench/kernel/binarysearch/binarysearch.c

bench/kernel/bitcount/bitcount.c

bench/kernel/bitonic/bitonic.c

bench/kernel/bsort/bsort.c

bench/kernel/complex_updates/complex_updates.c

bench/kernel/cosf/cosf.c

bench/kernel/countnegative/countnegative.c

bench/kernel/cubic/cubic.c

bench/kernel/deg2rad/deg2rad.c

bench/kernel/fac/fac.c

bench/kernel/fft/fft.c

bench/kernel/filterbank/filterbank.c

bench/kernel/fir2dim/fir2dim.c

bench/kernel/iir/iir.c

bench/kernel/insertsort/insertsort.c

bench/kernel/isqrt/isqrt.c

bench/kernel/jfdctint/jfdctint.c

bench/kernel/ludcmp/ludcmp.c

bench/kernel/matrix1/matrix1.c