perf_test.sh

#!/bin/bash
NUM_SAMPLES=50

echo "The following runtime deltas are reported in seconds."
echo "Collecting $NUM_SAMPLES samples..."

# Build project from scratch each time.
prepare_build() {
    make clean
    make all
    export LD_LIBRARY_PATH=$(pwd):$LD_LIBRARY_PATH
}

# Performance run
perf_test() {
    # Time before
    X0=$(date +%s.%N)

    # Run test program
    ./pi_integration_test > /dev/null

    # Time after
    X1=$(date +%s.%N)

    # Time delta
    delta=$(python -c "print($X1 - $X0)")
    echo $delta
}

# Repeat NUM_SAMPLES times
for (( i=1; i<=$NUM_SAMPLES; i++ )) do
    prepare_build > /dev/null
    perf_test
done

# Clean up when done
make clean > /dev/null