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Use echo instead of cat in loops in size_classes.sh

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This avoids fork/exec()ing in loops, as echo is a builtin, and makes
size_classes.sh much faster (from > 10s to < 0.2s on mingw on my machine).
This commit is contained in:
Mike Hommey 2012-04-16 16:30:23 +02:00 committed by Jason Evans
parent 2d04f5e5ff
commit 72ca7220f2
1 changed files with 11 additions and 21 deletions
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32
include/jemalloc/internal/size_classes.sh
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@ -35,10 +35,8 @@ while [ ${lg_q} -le ${lg_qmax} ] ; do
while [ ${lg_t} -le ${lg_q} ] ; do
lg_p=${lg_pmin}
while [ ${lg_p} -le ${lg_pmax} ] ; do
cat <<EOF
#if (LG_TINY_MIN == ${lg_t} && LG_QUANTUM == ${lg_q} && LG_PAGE == ${lg_p})
#define SIZE_CLASSES_DEFINED
EOF
echo "#if (LG_TINY_MIN == ${lg_t} && LG_QUANTUM == ${lg_q} && LG_PAGE == ${lg_p})"
echo "#define SIZE_CLASSES_DEFINED"
pow2 ${lg_q}; q=${pow2_result}
pow2 ${lg_t}; t=${pow2_result}
pow2 ${lg_p}; p=${pow2_result}
@ -46,16 +44,12 @@ EOF
psz=0
sz=${t}
delta=$((${sz} - ${psz}))
cat <<EOF
/* SIZE_CLASS(bin, delta, sz) */
#define SIZE_CLASSES \\
EOF
echo "/* SIZE_CLASS(bin, delta, sz) */"
echo "#define SIZE_CLASSES \\"
# Tiny size classes.
while [ ${sz} -lt ${q} ] ; do
cat <<EOF
SIZE_CLASS(${bin}, ${delta}, ${sz}) \\
EOF
echo " SIZE_CLASS(${bin}, ${delta}, ${sz}) \\"
bin=$((${bin} + 1))
psz=${sz}
sz=$((${sz} + ${sz}))
@ -73,22 +67,18 @@ EOF
fi
next_2pow=$((${sz} * 2))
while [ ${sz} -lt $next_2pow ] ; do
cat <<EOF
SIZE_CLASS(${bin}, ${delta}, ${sz}) \\
EOF
echo " SIZE_CLASS(${bin}, ${delta}, ${sz}) \\"
bin=$((${bin} + 1))
psz=${sz}
sz=$((${sz} + ${i}))
delta=$((${sz} - ${psz}))
done
done
cat <<EOF
#define NBINS ${bin}
#define SMALL_MAXCLASS ${psz}
#endif
EOF
echo
echo "#define NBINS ${bin}"
echo "#define SMALL_MAXCLASS ${psz}"
echo "#endif"
echo
lg_p=$((${lg_p} + 1))
done
lg_t=$((${lg_t} + 1))