These are some illustrations and videos that I have made over the years.
[Read More]Histogram Speeds in Python
Let’s compare several ways of making Histograms. I’m going to assume you would like to end up with a nice OO histogram interface, so all the 2D methods will fill a Physt histogram. We will be using a 2 x 1,000,000 element array and filling a 2D histogram, or 10,000,000 elemends in a 1D histogram. Binnings are regular.
1D 10,000,000 item histogram
| Example | KNL | MBP | X24 |
|---|---|---|---|
| NumPy: histogram | 704 ms | 147 ms | 114 ms |
| NumPy: bincount | 432 ms | 110 ms | 117 ms |
| fast-histogram | 337 ms | 45.9 ms | 45.7 ms |
| Numba | 312 ms | 58.8 ms | 60.7 ms |
2D 1,000,000 item histogram
| Example | KNL | MBP | X24 |
|---|---|---|---|
| Physt | 1.21 s | 293 ms | 246 ms |
| NumPy: histogram2d | 456 ms | 114 ms | 88.3 ms |
| NumPy: add.at | 247 ms | 62.7 ms | 49.7 ms |
| NumPy: bincount | 81.7 ms | 23.3 ms | 20.3 ms |
| fast-histogram | 53.7 ms | 10.4 ms | 7.31 ms |
| fast-hist threaded 0.5 | (6) 62.5 ms | 9.78 ms | (6) 15.4 ms |
| fast-hist threaded (m) | 62.3 ms | 4.89 ms | 3.71 ms |
| Numba | 41.8 ms | 10.2 ms | 9.73 ms |
| Numba threaded | (6) 49.2 ms | 4.23 ms | (6) 4.12 ms |
| Cython | 112 ms | 12.2 ms | 11.2 ms |
| Cython threaded | (6) 128 ms | 5.68 ms | (8) 4.89 ms |
| pybind11 sequential | 93.9 ms | 9.20 ms | 17.8 ms |
| pybind11 OpenMP atomic | 4.06 ms | 6.87 ms | 1.91 ms |
| pybind11 C++11 atomic | (32) 10.7 ms | 7.08 ms | (48) 2.65 ms |
| pybind11 C++11 merge | (32) 23.0 ms | 6.03 ms | (48) 4.79 ms |
| pybind11 OpenMP merge | 8.74 ms | 5.04 ms | 1.79 ms |
Binding Minuit2
Let’s try a non-trivial example of a binding: Minuit2 (6.14.0 standalone edition).
[Read More]Tools to Bind to Python
This was originally given as a PyHEP 2018 talk, It is designed to be interactive, and can be run in SWAN if you have a CERN account. If you want to run it manually, just download the repository: github.com/henryiii/pybindings_cc. It is easy to run in Anaconda.
[Read More]Python 3 upgrade
About ten years ago, Guido Van Rossum, the Python author and Benevolent Dictator for Life (BDFL), along with the Python community, decided to make several concurrent backward incompatible changes to Python 2.5 and release a new version, Python 3.0.
[Read More]A simple introduction to asyncio
This is a simple explanation of the asyncio module and new supporting language
features in Python 3.5. Even though the new keywords async and await are new
language constructs, they are mostly1 useless without an event loop, and that
is supplied in the standard library as asyncio. Also, you need awaitable
functions, which are only supplied by asyncio (or in the growing set of async
libraries, like asyncssh, quamash etc.).