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"""Performance tests for object store"""
from time import time
import sys
import stat
from lib import (
TestBigRepoR
)
class TestObjDBPerformance(TestBigRepoR):
def test_random_access(self):
results = [ ["Iterate Commits"], ["Iterate Blobs"], ["Retrieve Blob Data"] ]
for repo in (self.gitrorepo, self.puregitrorepo):
# GET COMMITS
st = time()
root_commit = repo.commit(self.head_sha_2k)
commits = list(root_commit.traverse())
nc = len(commits)
elapsed = time() - st
print >> sys.stderr, "%s: Retrieved %i commits from ObjectStore in %g s ( %f commits / s )" % (type(repo.odb), nc, elapsed, nc / elapsed)
results[0].append(elapsed)
# GET TREES
# walk all trees of all commits
st = time()
blobs_per_commit = list()
nt = 0
for commit in commits:
tree = commit.tree
blobs = list()
for item in tree.traverse():
nt += 1
if item.type == 'blob':
blobs.append(item)
# direct access for speed
# END while trees are there for walking
blobs_per_commit.append(blobs)
# END for each commit
elapsed = time() - st
print >> sys.stderr, "%s: Retrieved %i objects from %i commits in %g s ( %f objects / s )" % (type(repo.odb), nt, len(commits), elapsed, nt / elapsed)
results[1].append(elapsed)
# GET BLOBS
st = time()
nb = 0
too_many = 15000
data_bytes = 0
for blob_list in blobs_per_commit:
for blob in blob_list:
data_bytes += len(blob.data_stream.read())
# END for each blobsha
nb += len(blob_list)
if nb > too_many:
break
# END for each bloblist
elapsed = time() - st
print >> sys.stderr, "%s: Retrieved %i blob (%i KiB) and their data in %g s ( %f blobs / s, %f KiB / s )" % (type(repo.odb), nb, data_bytes/1000, elapsed, nb / elapsed, (data_bytes / 1000) / elapsed)
results[2].append(elapsed)
# END for each repo type
# final results
for test_name, a, b in results:
print >> sys.stderr, "%s: %f s vs %f s, pure is %f times slower" % (test_name, a, b, b / a)
# END for each result
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