Making code faster

[Sean 'Shaleh' Perry]

>>> 
>>>     i = -1
>>>     print 'loading file'
>>>     def tmp1(s):
>>>       global i
>>>       i += 1
>>>       return QSimpleViewItem(i,self.sv.lv.newColor,eval(s))
>>> 

you use a global --> time hit

>>>       tmp = myfile.readlines()

readlines is highly optimized

>>>       print 'lines loaded'
>>>       datei.close()
>>>       self.sv.lv.rows = map(tmp1,tmp)
>>>       self.sv.lv.visible = range(len(self.sv.lv.rows))
>>>       print 'lines decoded',self.sv.lv.rows[0].col[0]
>>> 
>>> Any ideas? It is astonishing that loading the lines from
>>> external storage takes much less time than the mapping
>>> itself!
>> 

Have you actually used a profiler on the code to see where the time was going?
Could your call to eval() not be where the time is going?