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# This module is part of GitPython and is released under the
# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
"""Performance tests for object store."""
import sys
from time import time
from test.performance.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(repo.head)
commits = list(root_commit.traverse())
nc = len(commits)
elapsed = time() - st
print(
"%s: Retrieved %i commits from ObjectStore in %g s ( %f commits / s )"
% (type(repo.odb), nc, elapsed, nc / elapsed),
file=sys.stderr,
)
results[0].append(elapsed)
# GET TREES
# Walk all trees of all commits.
st = time()
blobs_per_commit = []
nt = 0
for commit in commits:
tree = commit.tree
blobs = []
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(
"%s: Retrieved %i objects from %i commits in %g s ( %f objects / s )"
% (type(repo.odb), nt, len(commits), elapsed, nt / elapsed),
file=sys.stderr,
)
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
msg = "%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,
)
print(msg, file=sys.stderr)
results[2].append(elapsed)
# END for each repo type
# Final results.
for test_name, a, b in results:
print(
"%s: %f s vs %f s, pure is %f times slower" % (test_name, a, b, b / a),
file=sys.stderr,
)
# END for each result
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