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I am new to machine learning. I am using Support Vector Machines (SVM) with 'polynomial' ke… Read more Increase Speed For Svm With Polynomial Kernel

Updated for clarity: I need advice for performance when inserting/appending to a capped collection.… Read more Efficiency When Inserting Into Mongodb (pymongo)

Using random.shuffle, I noticed that shuffling list(range(n)) takes about 25% more time than shuffl… Read more Why Is Shuffling List(range(n)) Slower Than Shuffling [0]*n?

I have this simple function that partitions a list and returns an index i in the list such that ele… Read more Python3 Vs Python2 List/generator Range Performance

I have many pandas DataFrames for stocks. They all have the form: df_asset = pd.DataFrame(data=np.r… Read more Merging All Columns Of Pandas Dataframes

I have an array with some objects, and there are several objects that are alike. E.g: fruit = [appl… Read more How To Get The Most Represented Object From An Array

I have to generate all the 2-pair combinations of items in a list. Now, I know of two ways to accom… Read more Itertools Vs Nested Loops Performance

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'm looking to optimize the code below which takes ~5 seconds, which is too slow for a file of … Read more Optimize Parsing File With Json Objects In Pandas Dataframe, Where Keys May Be Missing In Some Rows

I have some python code for computing the maximal full-mesh in a graph. Each node of the graph can … Read more Maximal Full-mesh In A Graph - Python Code Is Very Slow

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 have the following dataframe: table2 = pd.DataFrame({ 'Product Type': ['A'… Read more Alternate Method To Avoid Loop In Pandas Dataframe

I have a following piece of code, which basically evaluates some numerical expression, and use it t… Read more Is There Any Good Way To Optimize The Speed Of This Python Code?

Data: theta is a vector of N angles. Question: How to create a vector of N 2D rotation matrix from … Read more How To Vectorize The Creation Of N Rotation Matrix From A Vector Of Angles?

I have two given 3d arrays x_dist and y_dist each of shape (36,50,50). Elements in x_dist and y_dis… Read more Fast Alternative To Conditionally Set An Array Elements

When using np.lib.stride_tricks.as_strided, how can I manage 2D a array with the nested arrays as d… Read more Numpy Rolling Window Over 2d Array, As A 1d Array With Nested Array As Data Values

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?

I have two pandas dataframes df1 and df2 and I want their 'merged index'. By that I mean th… Read more Efficiently Obtaining The Union Of Pandas Indices

I have been teaching myself OpenGL programming using the Python wrapper PyOpenGL, and am now worki… Read more Efficiency Of Display Lists In Opengl With Python?

I am trying to remove both the row i and column i when both the row i and column i contains all 0s.… Read more Efficiently Test Matrix Rows And Columns With Numpy