1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
"""
Check we can read all the test images
"""
import glob
import os
import time
import fabio.openimage
import gzip
import bz2
import pstats
import sys
try:
import cProfile
except ImportError:
import profile as cProfile
times = {}
images = []
for fname in glob.glob(os.path.join("testimages", "*")):
if fname.find("header_only") == -1:
images.append(fname)
images.sort()
def shellbench(cmd, imname):
"""
The shell appears to be lying about it's performance. It claims
zero time to gunzip a file when it actually takes 200 ms. This is
cheating via a cache I suspect. We shall try to avoid this problem
"""
if sys.platform != "win32":
os.system("touch " + imname)
astart = time.time()
dummy_file = os.popen(cmd + " " + imname, "rb").read()
return time.time() - astart
print("I/O 1 : Time to read the image")
print("I/O 2 : Time to read the image (repeat")
print("Fabio : Time for fabio to read the image")
print("Shell : Time for shell to do decompression")
print("Python : Time for python to do decompression\n")
print("I/O 1 I/O 2 Fabio Shell Python Size/MB")
for im in images:
# Network/disk io time first
start = time.clock()
the_file = open(im, "rb").read()
times[im] = [time.clock() - start]
start = time.clock()
# Network/disk should be cached
the_file = open(im, "rb").read()
times[im].append(time.clock() - start)
start = time.clock()
try:
fim = fabio.openimage.openimage(im)
except KeyboardInterrupt:
raise
except Exception:
print("Problem with image %s" % im)
continue
times[im].append(time.clock() - start)
nt = 3
ns = 2
# Now check for a fabio slowdown effect
if im[-3:] == '.gz':
times[im].append(shellbench("gzip -cd ", im))
nt += 1
ns -= 1
start = time.clock()
the_file = gzip.GzipFile(im, "rb").read()
times[im].append(time.clock() - start)
nt += 1
ns -= 1
if im[-4:] == '.bz2':
times[im].append(shellbench("bzip2 -cd ", im))
nt += 1
ns -= 1
start = time.clock()
the_file = bz2.BZ2File(im, "rb").read()
times[im].append(time.clock() - start)
nt += 1
ns -= 1
# Speed ratings in megabytes per second (for fabio)
MB = len(the_file) / 1024.0 / 1024.0
try:
print(("%.4f " * nt + " " * 7 * ns) % tuple(times[im]), "%8.3f" % (MB), im)
except Exception:
print(times[im], MB, im)
raise
cProfile.run("fabio.openimage.openimage(im)", "stats")
p = pstats.Stats("stats")
# Hack around python2.4
s = sys.stdout
sys.stdout = open("profile.txt", "a")
p.strip_dirs().sort_stats(-1).print_stats()
sys.stdout = s
|
