calculate_curl_fork_overhead() { local c_start=$(date +%s%N); for n in $(seq $(( $SOGO_CONCURRENCY_LIMIT * $SOGO_TEST_ITERATIONS )) ); do curl -s 2>&1 /dev/null done; local c_end=$(date +%s%N); echo "scale=2; $(( $c_end - $c_start )) / 1000000000" | bc -l }