Numexpr is a fast numerical expression evaluator for NumPy. With it, expressions that operate on arrays (like "3*a+4*b") are accelerated and use less memory than doing the same calculation in Python.
It wears multi-threaded capabilities, as well as support for Intel's MKL (Math Kernel Library), which allows an extremely fast evaluation of transcendental functions (sin, cos, tan, exp, log...) while squeezing the last drop of performance out of your multi-core processors. Look here for a some benchmarks of numexpr using MKL:
Its only dependency is NumPy (MKL is optional), so it works well as an easy-to-deploy, easy-to-use, computational engine for projects that don't want to adopt other solutions requiring more heavy dependencies.
What's new ==========
This is a maintenance release which contains several bug fixes, like better testing on Python3 platform and some harmless data race. Among the enhancements, AppVeyor support is here and MP_NUM_THREADS is honored as a fallback in case NUMEXPR_NUM_THREADS is not set.
In case you want to know more in detail what has changed in this version, see: