Is there a Python library that shows execution time per line? Question: I have found this library called heartrate which shows how many times each line has been hit. I’m wondering if there is a similar library that can show the execution time of each line? Sometimes a single line can be a bottleneck of …
How to fix multiple if codes in python Question: My python code is ugly. How to tune this code? find_list1 = re.findall(p1, path) find_list2 = re.findall(p2, path) find_list3 = re.findall(p3, path) if len(find_list1) > 0:find_list = find_list1 if len(find_list2) > 0:find_list = find_list2 if len(find_list3) > 0:find_list = find_list3 if len(re.findall(p1, path)) > 0:date_str1 += …
Fastest way to find the number of elements within a certain interval using two lists Question: I have two lists called intervals and TIME. For each t in intervals, I define an interval (t-dt/2 and t+dt/2) and I want to calculate how many elements in TIME fall into that interval. Basically what I do is …
Why calling assigned lambda is faster than calling function and lambda (not assigned)? Question: Why calling an assigned lambda in python3.11 is faster than: calling function lambda that isn’t assigned Why this happens only (maybe) on python 3.11 and not 3.7? I tried this: Python 3.11.2 (tags/v3.11.2:878ead1, Feb 7 2023, 16:38:35) [MSC v.1934 64 bit …
Numpy array copy slower than Python list copy Question: I’ve seen several posts here about accessing individual items in numpy arrays and python lists via a for loop. My program is a little different. What I’m doing is copying a small array (or list) of about 10 elements and then using it. I’m doing this …
Why are for-loops much slower than broadcasting Question: Comparing two chunks of code for a simple matrix operation, the one with a nested for loop is much slower. I wonder: what is the underlying reason for this? This loop tuns for 2.5 seconds: m = np.zeros((800,8000)) for i in range(0,800): for j in range(0,8000): m[i,j] …
How do I add a skip condition to a for loop without slowing it down? Question: I am writing a function which processes a big list of elements, and want to add the functionality that certain elements are skipped depending on an input argument. Here’s what the code looks like: def f(lst, skipsEnabled=False): for elem …
How is that pandas is faster than pure C in the groupby operation? Question: I have an nparray of x,y pairs with shape (n,2), and knowing for certain that for each x there are multiple values of y , I wanted to calculate the average value of y for each unique x. It occurred to …
I need help to speed up of a Python for-loop with huge amount of calculations Question: I am working on a pice of Python software that requires to run a huge amount of calculations. I am talking about up to hundred of millions of calculations or more (n in below code can be 100000 or …
Dataframe of start and end dates into sum of days in an array of periods Question: I have a pandas data frame of start and end dates for contracts. I want to work out the number of in force contract days for all periods (e.g. months) covered by the contracts. Example input: start_date end_date 0 …
