bnglatlon-cpp
British National Grid to WGS84 conversion, rewritten from Python to C++ and benchmarked.
Open source
View sourcebnglatlon-cpp converts coordinates between British National Grid (OSGB36) and latitude and longitude (WGS84). It is a C++ implementation of the Python module fmalina/blocl-bnglatlon, packaged as a Python extension.
1
Results
Over 100 runs, the C++ version used about 91% less CPU time than the Python version, with almost no change in memory use.
| Item | CPU time (× 10⁻⁴ seconds) | Memory (MiB) |
|---|---|---|
| Python | 9.27458 | 20.828125 |
| C++ | 0.81958 | 20.812500 |
2
Write-up
The full account is in Rewriting Python Modules in C++, for a Performance Boost.