You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
150 lines
5.7 KiB
150 lines
5.7 KiB
"""Performance data streaming performance"""
|
|
from __future__ import print_function
|
|
|
|
import os
|
|
import subprocess
|
|
import sys
|
|
from time import time
|
|
|
|
from git.test.lib import (
|
|
with_rw_repo
|
|
)
|
|
from git.util import bin_to_hex
|
|
from gitdb import (
|
|
LooseObjectDB,
|
|
IStream
|
|
)
|
|
from gitdb.test.lib import make_memory_file
|
|
|
|
import os.path as osp
|
|
|
|
from .lib import (
|
|
TestBigRepoR
|
|
)
|
|
|
|
|
|
class TestObjDBPerformance(TestBigRepoR):
|
|
|
|
large_data_size_bytes = 1000 * 1000 * 10 # some MiB should do it
|
|
moderate_data_size_bytes = 1000 * 1000 * 1 # just 1 MiB
|
|
|
|
@with_rw_repo('HEAD', bare=True)
|
|
def test_large_data_streaming(self, rwrepo):
|
|
# TODO: This part overlaps with the same file in gitdb.test.performance.test_stream
|
|
# It should be shared if possible
|
|
ldb = LooseObjectDB(osp.join(rwrepo.git_dir, 'objects'))
|
|
|
|
for randomize in range(2):
|
|
desc = (randomize and 'random ') or ''
|
|
print("Creating %s data ..." % desc, file=sys.stderr)
|
|
st = time()
|
|
size, stream = make_memory_file(self.large_data_size_bytes, randomize)
|
|
elapsed = time() - st
|
|
print("Done (in %f s)" % elapsed, file=sys.stderr)
|
|
|
|
# writing - due to the compression it will seem faster than it is
|
|
st = time()
|
|
binsha = ldb.store(IStream('blob', size, stream)).binsha
|
|
elapsed_add = time() - st
|
|
assert ldb.has_object(binsha)
|
|
db_file = ldb.readable_db_object_path(bin_to_hex(binsha))
|
|
fsize_kib = osp.getsize(db_file) / 1000
|
|
|
|
size_kib = size / 1000
|
|
msg = "Added %i KiB (filesize = %i KiB) of %s data to loose odb in %f s ( %f Write KiB / s)"
|
|
msg %= (size_kib, fsize_kib, desc, elapsed_add, size_kib / elapsed_add)
|
|
print(msg, file=sys.stderr)
|
|
|
|
# reading all at once
|
|
st = time()
|
|
ostream = ldb.stream(binsha)
|
|
shadata = ostream.read()
|
|
elapsed_readall = time() - st
|
|
|
|
stream.seek(0)
|
|
assert shadata == stream.getvalue()
|
|
msg = "Read %i KiB of %s data at once from loose odb in %f s ( %f Read KiB / s)"
|
|
msg %= (size_kib, desc, elapsed_readall, size_kib / elapsed_readall)
|
|
print(msg, file=sys.stderr)
|
|
|
|
# reading in chunks of 1 MiB
|
|
cs = 512 * 1000
|
|
chunks = []
|
|
st = time()
|
|
ostream = ldb.stream(binsha)
|
|
while True:
|
|
data = ostream.read(cs)
|
|
chunks.append(data)
|
|
if len(data) < cs:
|
|
break
|
|
# END read in chunks
|
|
elapsed_readchunks = time() - st
|
|
|
|
stream.seek(0)
|
|
assert b''.join(chunks) == stream.getvalue()
|
|
|
|
cs_kib = cs / 1000
|
|
print("Read %i KiB of %s data in %i KiB chunks from loose odb in %f s ( %f Read KiB / s)"
|
|
% (size_kib, desc, cs_kib, elapsed_readchunks, size_kib / elapsed_readchunks), file=sys.stderr)
|
|
|
|
# del db file so git has something to do
|
|
ostream = None
|
|
import gc
|
|
gc.collect()
|
|
os.remove(db_file)
|
|
|
|
# VS. CGIT
|
|
##########
|
|
# CGIT ! Can using the cgit programs be faster ?
|
|
proc = rwrepo.git.hash_object('-w', '--stdin', as_process=True, istream=subprocess.PIPE)
|
|
|
|
# write file - pump everything in at once to be a fast as possible
|
|
data = stream.getvalue() # cache it
|
|
st = time()
|
|
proc.stdin.write(data)
|
|
proc.stdin.close()
|
|
gitsha = proc.stdout.read().strip()
|
|
proc.wait()
|
|
gelapsed_add = time() - st
|
|
del(data)
|
|
assert gitsha == bin_to_hex(binsha) # we do it the same way, right ?
|
|
|
|
# as its the same sha, we reuse our path
|
|
fsize_kib = osp.getsize(db_file) / 1000
|
|
msg = "Added %i KiB (filesize = %i KiB) of %s data to using git-hash-object in %f s ( %f Write KiB / s)"
|
|
msg %= (size_kib, fsize_kib, desc, gelapsed_add, size_kib / gelapsed_add)
|
|
print(msg, file=sys.stderr)
|
|
|
|
# compare ...
|
|
print("Git-Python is %f %% faster than git when adding big %s files"
|
|
% (100.0 - (elapsed_add / gelapsed_add) * 100, desc), file=sys.stderr)
|
|
|
|
# read all
|
|
st = time()
|
|
hexsha, typename, size, data = rwrepo.git.get_object_data(gitsha) # @UnusedVariable
|
|
gelapsed_readall = time() - st
|
|
print("Read %i KiB of %s data at once using git-cat-file in %f s ( %f Read KiB / s)"
|
|
% (size_kib, desc, gelapsed_readall, size_kib / gelapsed_readall), file=sys.stderr)
|
|
|
|
# compare
|
|
print("Git-Python is %f %% faster than git when reading big %sfiles"
|
|
% (100.0 - (elapsed_readall / gelapsed_readall) * 100, desc), file=sys.stderr)
|
|
|
|
# read chunks
|
|
st = time()
|
|
hexsha, typename, size, stream = rwrepo.git.stream_object_data(gitsha) # @UnusedVariable
|
|
while True:
|
|
data = stream.read(cs)
|
|
if len(data) < cs:
|
|
break
|
|
# END read stream
|
|
gelapsed_readchunks = time() - st
|
|
msg = "Read %i KiB of %s data in %i KiB chunks from git-cat-file in %f s ( %f Read KiB / s)"
|
|
msg %= (size_kib, desc, cs_kib, gelapsed_readchunks, size_kib / gelapsed_readchunks)
|
|
print(msg, file=sys.stderr)
|
|
|
|
# compare
|
|
print("Git-Python is %f %% faster than git when reading big %s files in chunks"
|
|
% (100.0 - (elapsed_readchunks / gelapsed_readchunks) * 100, desc), file=sys.stderr)
|
|
# END for each randomization factor
|