run

#!/bin/bash

CC=gcc

LOOP_MAX=10000
LOOP_DELTA=100

INLINE_SRC=inline.c
MACRO_SRC=macro.c

function generate_inline_src {
    local nloop=$1

    rm -f ${INLINE_SRC}
    cat $INLINE_SRC.head >>$INLINE_SRC
    awk -v n=$nloop 'BEGIN{for (i=0;i<n;i++) printf("\tswap(&a, &b);\n")}' >>$INLINE_SRC
    cat swap.c.tail >>$INLINE_SRC
}

function generate_macro_src {
    local nloop=$1

    rm -f ${MACRO_SRC}
    cat $MACRO_SRC.head >>$MACRO_SRC
    awk -v n=$nloop 'BEGIN{for (i=0;i<n;i++) printf("\tswap(a, b);\n")}' >>$MACRO_SRC
    cat swap.c.tail >>$MACRO_SRC
}

# inline

echo "gathering inline data..." >&2

for ((i = 0; i <= $LOOP_MAX; i += $LOOP_DELTA)) ; do
    echo -n "$i "
    generate_inline_src $i
    ( time $CC -O2 -o ${INLINE_SRC%.c} ${INLINE_SRC} ) 2>&1 | grep real
done | awk '{print $1"\t"$3}' | sed -e 's/0m\(.*\)s$/\1/' >inline.result

# macro

echo "gathering macro data..." >&2

for ((i = 0; i <= $LOOP_MAX; i += $LOOP_DELTA)) ; do
    echo -n "$i "
    generate_macro_src $i
    (time $CC -O2 -o ${MACRO_SRC%.c} ${MACRO_SRC} ) 2>&1 | grep real
done | awk '{print $1"\t"$3}' | sed -e 's/0m\(.*\)s$/\1/' >macro.result