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#!/bin/sh
script="$1"
test_number="$2"
info_dir="$3"
# This aborts the bisection immediately
die () {
echo >&2 "error: $*"
exit 255
}
bisect_head=$(git rev-parse --verify BISECT_HEAD) || die "Failed to find BISECT_HEAD ref"
script_number=$(echo "$script" | sed -e "s/^p\([0-9]*\).*\$/\1/") || die "Failed to get script number for '$script'"
oldtime=$(cat "$info_dir/oldtime") || die "Failed to access '$info_dir/oldtime'"
newtime=$(cat "$info_dir/newtime") || die "Failed to access '$info_dir/newtime'"
cd t/perf || die "Failed to cd into 't/perf'"
result_file="$info_dir/perf_${script_number}_${bisect_head}_results.txt"
GIT_PERF_DIRS_OR_REVS="$bisect_head"
export GIT_PERF_DIRS_OR_REVS
./run "$script" >"$result_file" 2>&1 || die "Failed to run perf test '$script'"
rtime=$(sed -n "s/^$script_number\.$test_number:.*\([0-9]\+\.[0-9]\+\)(.*).*\$/\1/p" "$result_file")
echo "newtime: $newtime"
echo "rtime: $rtime"
echo "oldtime: $oldtime"
# Compare ($newtime - $rtime) with ($rtime - $oldtime)
# Times are decimal number, not integers
if test $(echo "$newtime" "$rtime" "$oldtime" | awk '{ print ($1 - $2 > $2 - $3) }') = 1
then
# Current commit is considered "good/old"
echo "$rtime" >"$info_dir/oldtime"
exit 0
else
# Current commit is considered "bad/new"
echo "$rtime" >"$info_dir/newtime"
exit 1
fi
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