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# Run some timing tests of JsonData vs SqliteData.
import random
import time
from coverage.data import CoverageJsonData
from coverage.sqldata import CoverageSqliteData
NUM_FILES = 1000
NUM_LINES = 1000
def gen_data(cdata):
rnd = random.Random()
rnd.seed(17)
def linenos(num_lines, prob):
return (n for n in range(num_lines) if random.random() < prob)
start = time.time()
for i in range(NUM_FILES):
filename = "/src/foo/project/file{i}.py".format(i=i)
line_data = { filename: dict.fromkeys(linenos(NUM_LINES, .6)) }
cdata.add_lines(line_data)
cdata.write()
end = time.time()
delta = end - start
return delta
class DummyData:
def add_lines(self, line_data):
return
def write(self):
return
overhead = gen_data(DummyData())
jtime = gen_data(CoverageJsonData("gendata.json")) - overhead
stime = gen_data(CoverageSqliteData("gendata.db")) - overhead
print("Overhead: {overhead:.3f}s".format(overhead=overhead))
print("JSON: {jtime:.3f}s".format(jtime=jtime))
print("SQLite: {stime:.3f}s".format(stime=stime))
print("{slower:.3f}x slower".format(slower=stime/jtime))
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