#!/usr/bin/env python3

import re
import sys

basename = sys.argv[1]

bench_pattern = re.compile('^(.+?)\s+(\d+\.?\d*) ns\s+(\d+\.?\d*) ns\s+(\d+)')

def parse_file(filename):
    res = []
    with open(filename) as f:
        # ignore header
        f.readline()
        f.readline()
        f.readline()
        while line := f.readline():
            m = bench_pattern.match(line)
            res.append((m.group(1), float(m.group(2)),
                        float(m.group(3)), int(m.group(4))))
    return res

untuned = parse_file(basename + '-untuned')
tuned = parse_file(basename + '-tuned')

print(f'{"Benchmark":50} {"Time":>8}   {"CPU":>8}   {"Iterations":>8}')
for (u_name, u_time, u_cpu, u_iterations), \
        (t_name, t_time, t_cpu, t_iterations) in zip(untuned, tuned):
    assert u_name == t_name
    rel_time = (t_time - u_time) / u_time
    rel_cpu = (t_cpu - u_cpu) / u_cpu
    rel_iterations = (t_iterations - u_iterations) / u_iterations
    print(f'{u_name:50} {rel_time * 100:6.1f} %   {rel_cpu * 100:6.1f} %   {rel_iterations * 100:6.1f} %')