[Xapian-devel] Graphing script and timing patch

[Aarsh Shah]

Hello,
As discussed on IRC, I timed the inl2weight3 test against multiple
documents and queries , got the output written to a text file and then
wrote a python/matplotlib graphing script which drew a bar chart by reading
the text file. I have attached the bar chart , the python script and the
api_weight.cc file which contains the timed inl2weight3 test. The timing
was done using the RealTime::now() function.

-> I am adding comments to my proposal based on what I learnt from this
exercise and have thought of some modifications.

-> I had also sent in screenshots of profiling inl2 earlier by using
callgrind.

-> Please do let me know what you think.

-Regards
-Aarsh
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import numpy as np
import matplotlib.pyplot as plt

x=[]
y=[]
fileInput=open("perf_inl2.txt","r")
i=0
for line in fileInput:
	if i==0:
		title=line
		i = i + 1
		continue
	else:
		fields=line.split(" ")		
		x.append(fields[0].strip())
		y.append(float(fields[1].strip()))
		i = i + 1

fileInput.close()
tot_elements = i - 1
x_axis = np.arange(tot_elements)
bar_width = 0.2

graph = plt.bar(x_axis,y,bar_width)
plt.xlabel("Documents")
plt.ylabel("Timings")
plt.title(title)
plt.xticks(x_axis+bar_width,x)
plt.show()


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