By re-opening script, processing speed decreases - performance

Question

This is the code I have written.
It parses an xml and turns on lights when a certain condition is true.
The problem I have is, if I restart the script it takes longer to read out or process the xml. If I restart again, it takes even longer. So at some point it takes 10 or more seconds till one cycle is through.
def core():
import urllib #import urllib.request
x = 0
while True:
### XML Extraction ###
from xml.dom import minidom
xml = urllib.urlopen("http://192.168.60.242/xml") # xml = urllib.request.urlopen("http://192.168.60.242/xml")
xml_string = xml.read()
xml.close()
re_string = xml_string[130:4000]
re_string = re_string.replace('</TEXTAREA></FORM></BODY></HTML>', '') #zwecks inkompatibilität mit Python 3.5, muss hier eine Änderung vorgenommen werden
#parsing
xmldoc = minidom.parseString(re_string)
Sensor0Elm = xmldoc.getElementsByTagName('t0')
Sensor1Elm = xmldoc.getElementsByTagName('t1')
#Sensor2Elm = xmldoc.getElementsByTagName('t2')
Sensor0Elm = Sensor0Elm[0]
Sensor1Elm = Sensor1Elm[0]
#Sensor2Elm = Sensor2Elm[0]
Sensor0 = Sensor0Elm.childNodes[0].data
Sensor1 = Sensor1Elm.childNodes[0].data
#Sensor2 = Sensor2Elm.childNodes[0].data
Sensor0 = float(Sensor0)
Sensor1 = float(Sensor1)
#Sensor2 = float(Sensor2)
#Datenaufbereitung
print (Sensor0*100.000000000001)
print (Sensor1*100.000000000001)
#print (Sensor2*100)
### int to bin ###
Sensor0=bin(int(Sensor0*100.000000000001))
Sensor1=bin(int(Sensor1*100.000000000001))
#Sensor2=bin(int(Sensor2*100))
Sensor0 = Sensor0[2:]
Sensor1 = Sensor1[2:]
#Sensor2 = Sensor2[2:]
Sensor0_count_int = int(len(str(Sensor0)))
Sensor1_count_int = int(len(str(Sensor1)))
#Sensor2_count_int = int(len(str(Sensor2)))
Sub0 = int(8 - Sensor0_count_int)
Sub1 = int(8 - Sensor1_count_int)
#Sub2 = int(8 - Sensor2_count_int)
Sensor0_compl = (str(Sub0*"0")+Sensor0)
Sensor1_compl = (str(Sub1*"0")+Sensor1)
#Sensor2_compl = (str(Sub2*"0")+Sensor2)
x = x+1
print (">>>", x ,"<<<")
print (Sensor0_compl)
print (Sensor1_compl)
#print (Sensor2_compl)
#############################
# import RPi.GPIO as GPIO
# GPIO.setmode(GPIO.BCM)
# GPIO.setup(4,GPIO.OUT)
# GPIO.setup(5,GPIO.OUT)
# GPIO.setup(6,GPIO.OUT)
# GPIO.setup(12,GPIO.OUT)
# GPIO.setup(13,GPIO.OUT)
# GPIO.setup(16,GPIO.OUT)
# GPIO.setup(17,GPIO.OUT)
# GPIO.setup(18,GPIO.OUT)
# GPIO.setup(19,GPIO.OUT)
# GPIO.setup(20,GPIO.OUT)
# GPIO.setup(21,GPIO.OUT)
# GPIO.setup(22,GPIO.OUT)
# GPIO.setup(23,GPIO.OUT)
# GPIO.setup(24,GPIO.OUT)
# GPIO.setup(25,GPIO.OUT)
#############################
#Sensor0
# AgCh3A=(Sensor0_compl[0:1])
# if AgCh3A=="0":
# GPIO.output(4,True)
# else:
# GPIO.output(4,False)
# AgPro2=(Sensor0_compl[1:2])
# if AgPro2=="0":
# GPIO.output(5,True)
# else:
# GPIO.output(5,False)
# CharRo440=(Sensor0_compl[2:3])
# if CharRo440=="0":
# GPIO.output(6,True)
# else:
# GPIO.output(6,False)
# AgInnoC=(Sensor0_compl[3:4])
# if AgInnoC=="0":
# GPIO.output(12,True)
# else:
# GPIO.output(12,False)
# AgInnoB=(Sensor0_compl[4:5])
# if AgInnoB=="0":
# GPIO.output(13,True)
# else:
# GPIO.output(13,False)
# ZK700=(Sensor0_compl[5:6])
# if ZK700=="0":
# GPIO.output(16,True)
# else:
# GPIO.output(16,False)
# AgF3000=(Sensor0_compl[6:7])
# if AgF3000=="0":
# GPIO.output(17,True)
# else:
# GPIO.output(17,False)
# ZK1200=(Sensor0_compl[7:8])
# if ZK1200=="0":
# GPIO.output(18,True)
# else:
# GPIO.output(18,False)
#Sensor1
# AgProV3=(Sensor1_compl[3:4])
# if AgProV3=="0":
# GPIO.output(19,True)
# else:
# GPIO.output(19,False)
# MakWPG1=(Sensor1_compl[4:5])
# if MakWPG1=="0":
# GPIO.output(20,True)
# else:
# GPIO.output(20,False)
# AgExcell2eC=(Sensor1_compl[5:6])
# if AgExcell2eC=="0":
# GPIO.output(21,True)
# else:
# GPIO.output(21,False)
# AgCh2eC=(Sensor1_compl[6:7])
# if AgCh2eC=="0":
# GPIO.output(22,True)
# else:
# GPIO.output(22,False)
# AgCh3B=(Sensor1_compl[7:8])
# if AgCh3B=="0":
# GPIO.output(23,True)
# else:
# GPIO.output(23,False)
#################################
# MM5=(Sensor1_compl[5:6])
# if MM5=="0":
# GPIO.output(24,True)
# else:
# GPIO.output(24,False)
# MM6=(Sensor1_compl[6:7])
# if MM6=="0":
# GPIO.output(25,True)
# else:
# GPIO.output(25,False)
# MM7=(Sensor2_compl[0:1])
# if MM7=="0":
# GPIO.output(1,True)
# else:
# GPIO.output(1,False)
#Sensor2
# MMM0=int(Sensor2[2:3])
# if M0==1:
# GPIO.output(1,True)
# else:
# GPIO.output(1,False)
# MMM1=int(Sensor2[3:4])
# if M0==1:
# GPIO.output(1,True)
# else:
# GPIO.output(1,False)
# MMM2=int(Sensor2[4:5])
# if M0==1:
# GPIO.output(1,True)
# else:
# GPIO.output(1,False)
# MMM3=int(Sensor2[5:6])
# if M0==1:
# GPIO.output(1,True)
# else:
# GPIO.output(1,False)
# MMM4=int(Sensor2[6:7])
# if M0==1:
# GPIO.output(1,True)
# else:
# GPIO.output(1,False)
# MMM5=int(Sensor2[7:8])
# if M0==1:
# GPIO.output(1,True)
# else:
# GPIO.output(1,False)
# MMM6=int(Sensor2[8:9])
# if M0==1:
# GPIO.output(1,True)
# else:
# GPIO.output(1,False)
# MMM7=int(Sensor2[9:10])
# if M0==1:
# GPIO.output(1,True)
# else:
# GPIO.output(1,False)
#import time
#time.sleep(1)
#GPIO.cleanup()
def main():
import time
while True:
try:
core()
except:
continue
time.sleep(0.01)
main()
Does somebody have an idea where my issue originates from?
Thank you

Answer 1

I suspect that the script isn't closing when you think it is. The obvious way to check for this is to see if pythonw.exe is still running in task manager.
To be really, really,sure you could create a file in the 'continue' block of your try/except:
with open('filepath\file.txt','w') as myfile:
pass
Then when you think you've killed the script, delete this file and see if it comes back. You'd have to increase your timeout to 1s or so to avoid flooding your system with file-creation requests as well.
Two thing to try first though:
Get rid of the while True at the top of core(), it seems unnecessary
Reduce the frequency of your calling loop, to, say once or twice a second