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#!/usr/bin/env python
from __future__ import print_function
import time, subprocess, sys, os, shutil, glob, random
import argparse
def median(lst):
lst = sorted(lst)
mid, odd = divmod(len(lst), 2)
if odd:
return lst[mid]
else:
return (lst[mid - 1] + lst[mid]) / 2.0
def mean(lst):
return float(sum(lst)) / max(len(lst), 1)
compiler_path = ''
flags = []
main_file = r'''
#define CATCH_CONFIG_MAIN
#include "catch.hpp"
'''
main_name = 'catch-main.cpp'
dir_name = 'benchmark-dir'
files = 20
test_cases_in_file = 20
sections_in_file = 4
assertions_per_section = 5
checks = [
'a != b', 'a != c', 'a != d', 'a != e', 'b != c', 'b != d', 'b != e', 'c != d', 'c != e', 'd != e', 'a + a == a',
'a + b == b', 'a + c == c', 'a + d == d', 'a + e == e', 'b + a == b', 'b + b == c', 'b + c == d',
'b + d == e', 'c + a == c', 'c + b == d', 'c + c == e', 'd + a == d', 'd + b == e', 'e + a == e',
'a + a + a == a', 'b + c == a + d', 'c + a + a == a + b + b + a',
'a < b', 'b < c', 'c < d', 'd < e', 'a >= a', 'd >= b',
]
def create_temp_dir():
if os.path.exists(dir_name):
shutil.rmtree(dir_name)
os.mkdir(dir_name)
def copy_catch(path_to_catch):
shutil.copy(path_to_catch, dir_name)
def create_catch_main():
with open(main_name, 'w') as f:
f.write(main_file)
def compile_main():
start_t = time.time()
subprocess.check_call([compiler_path, main_name, '-c'] + flags)
end_t = time.time()
return end_t - start_t
def compile_files():
cpp_files = glob.glob('*.cpp')
start_t = time.time()
subprocess.check_call([compiler_path, '-c'] + flags + cpp_files)
end_t = time.time()
return end_t - start_t
def link_files():
obj_files = glob.glob('*.o')
start_t = time.time()
subprocess.check_call([compiler_path] + flags + obj_files)
end_t = time.time()
return end_t - start_t
def benchmark(func):
results = [func() for i in range(10)]
return mean(results), median(results)
def char_range(start, end):
for c in range(ord(start), ord(end)):
yield chr(c)
def generate_sections(fd):
for i in range(sections_in_file):
fd.write(' SECTION("Section {}") {{\n'.format(i))
fd.write('\n'.join(' CHECK({});'.format(check) for check in random.sample(checks, assertions_per_section)))
fd.write(' }\n')
def generate_file(file_no):
with open('tests{}.cpp'.format(file_no), 'w') as f:
f.write('#include "catch.hpp"\n\n')
for i in range(test_cases_in_file):
f.write('TEST_CASE("File {} test {}", "[.compile]"){{\n'.format(file_no, i))
for i, c in enumerate(char_range('a', 'f')):
f.write(' int {} = {};\n'.format(c, i))
generate_sections(f)
f.write('}\n\n')
def generate_files():
create_catch_main()
for i in range(files):
generate_file(i)
options = ['all', 'main', 'files', 'link']
parser = argparse.ArgumentParser(description='Benchmarks Catch\'s compile times against some synthetic tests')
# Add first arg -- benchmark type
parser.add_argument('benchmark_kind', nargs='?', default='all', choices=options, help='What kind of benchmark to run, default: all')
# Args to allow changing header/compiler
parser.add_argument('-I', '--catch-header', default='catch.hpp', help = 'Path to catch.hpp, default: catch.hpp')
parser.add_argument('-c', '--compiler', default='g++', help = 'Compiler to use, default: g++')
parser.add_argument('-f', '--flags', nargs='*', help = 'Flags to be passed to the compiler')
# Allow creating files only, without running the whole thing
parser.add_argument('-g', '--generate-files', action='store_true', help='Generate test files and quit')
args = parser.parse_args()
compiler_path = args.compiler
catch_path = args.catch_header
if args.generate_files:
create_temp_dir()
copy_catch(catch_path)
os.chdir(dir_name)
# now create the fake test files
generate_files()
# Early exit
print('Finished generating files')
exit(1)
os.chdir(dir_name)
if args.flags:
flags = args.flags
print('Time needed for ...')
if args.benchmark_kind in ('all', 'main'):
print(' ... compiling main, mean: {:.2f}, median: {:.2f} s'.format(*benchmark(compile_main)))
if args.benchmark_kind in ('all', 'files'):
print(' ... compiling test files, mean: {:.2f}, median: {:.2f} s'.format(*benchmark(compile_files)))
if args.benchmark_kind in ('all', 'link'):
print(' ... linking everything, mean: {:.2f}, median: {:.2f} s'.format(*benchmark(link_files)))
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