Questions tagged [performance]

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87
votes
12answers
13k views

How big is big data?

Lots of people use the term big data in a rather commercial way, as a means of indicating that large datasets are involved in the computation, and therefore potential solutions must have good ...
10
votes
1answer
738 views

What is the best performance metric used in balancing dataset using SMOTE technique

I used smote technique to oversample my dataset and now I have a balanced dataset. The problem I faced is that the performance metrics; precision, recall, f1 measure, accuracy in the imbalanced ...
1
vote
2answers
1k views

Benchmarks based on neural networks libraries to compare the performance between different GPUs

I am looking for benchmarks based on neural networks libraries (Theano/TensorFlow/Torch/Caffe/…) to compare the performance between different GPUs. I am aware of: https://github.com/jcjohnson/cnn-...
3
votes
1answer
165 views

Understanding ROCs in imbalanced data-sets

A response variable (label) $B$ can either be $0$ or $1$. In the training set, $B_i = 1$ is an extremely rare event at only $0.26\%$ occurrences. Which makes the prediction of this label on a test ...
3
votes
1answer
334 views

Online/incremental unsupervised dimensionality reduction for use with classification for event prediction

Consider the application: We have a set of users and items. Users can perform different action types (think browsing, clicking, upvoting etc.) on different items. Users and items accumulate a "...
3
votes
2answers
28 views

Does Sampling size matters in Multi classification Model

I am working on a multi class classification model where few of the class are with less data compare to other classes. I used random sampling technique to create a sample from the population keeping ...
3
votes
1answer
3k views

Performance issues when merging two dataframe columns into one on millions rows with Pandas

I am trying to merge two address columns into one and separate the resulting string with '--'. The dataset has 10 million rows and 33 columns - but the number of rows grows for a million or so a month....