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So I was messing around in idle with recursion, and I noticed that a loop using recursion was much … Read more Why Is Recursion In Python So Slow?

I am implementing a Genetic Algorithm. For this algorithm a number of iterations (between 100 to 50… Read more Faster Way To Group Data Than Pandas Groupby

Suppose I have a column vector y with length n, and I have a matrix X of size n*m. I want to check … Read more Numpy Element-wise In Operation

Let say I have two large 2-d numpy array of same dimensions (say 2000x2000). I want to sum them ele… Read more Is There A Faster Way To Add Two 2-d Numpy Array

I have a simple view which renders an HTML template. No variables whatsoever and no database querie… Read more Django Performance, Slow Ttfb Without Any Queries

I am profiling a numpy dot product call. numpy.dot(pseudo,pseudo) pseudo is a numpy array of cust… Read more Reasons Of Slowness In Numpy.dot() Function And How To Mitigate Them If Custom Classes Are Used?

I have wrote some very simple tests (I know, they are not 'conclusive', but they make me cu… Read more Why Is Python's 'all' Function So Slow?

I need to match certain URLs in web application, i.e. /123,456,789, and wrote this regex to match t… Read more Why Does This Take So Long To Match? Is It A Bug?

I am using quite a lot of fortran libraries to do some mathematical computation. So all the arrays … Read more How To Force Numpy Array Order To Fortran Style?

Problem Descritpion How can I access the data from the Chrome Performance tool either from the brow… Read more Chrome: Api For Performance Data

I set up a system to filter the twitter real time stream sample. Obviously, the database writes ar… Read more Slow Django Database Operations On Large (ish) Dataset.

I've been trying to apply an algorithm to reduce a python list into a smaller one based on a ce… Read more Itertools.islice Compared To List Slice

I have a numpy array like this import numpy as np ar = np.array([1, 2, 3, 4]) and I want to creat… Read more Create A Matrix From A Vector Where Each Row Is A Shifted Version Of The Vector

I'm currently solving the second exercise in this assignment (this is not homework, I'm act… Read more Avoid A Deepcopy When Doing A Bfs

I notice some interesting behavior when it comes to building lists in different ways. .append takes… Read more Speedups In Looping Structures

I'm looking for the time complexity of these methods as a function of the number of rows in a d… Read more What Is The Time Complexity Of .at And .loc In Pandas?

I'm not clear on what goes on behind the scenes of a dictionary lookup. Does key size factor i… Read more Optimizing Python Dictionary Lookup Speeds By Shortening Key Size?

I tried to process the same request to the same database using 'Python 2.7.4 + sqlite3' and… Read more Why Python+sqlite3 Is Extremely Slow?

first of all, i am quite new in Python (an programming area) but i wish to learn and convert a func… Read more Implement A Script In A Function. Some Suggestions?

At the moment I am using matplotlib to plot multiple numpy arrays (or lists) of data. These corresp… Read more Pyqtgraph For Plotting Multiple Data Lists