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This adds bounds-unchecked access to arrays through a `a.unchecked<Type,
Dimensions>()` method. (For `array_t<T>`, the `Type` template parameter
is omitted). The mutable version (which requires the array have the
`writeable` flag) is available as `a.mutable_unchecked<...>()`.
Specifying the Dimensions as a template parameter allows storage of an
std::array; having the strides and sizes stored that way (as opposed to
storing a copy of the array's strides/shape pointers) allows the
compiler to make significant optimizations of the shape() method that it
can't make with a pointer; testing with nested loops of the form:
for (size_t i0 = 0; i0 < r.shape(0); i0++)
for (size_t i1 = 0; i1 < r.shape(1); i1++)
...
r(i0, i1, ...) += 1;
over a 10 million element array gives around a 25% speedup (versus using
a pointer) for the 1D case, 33% for 2D, and runs more than twice as fast
with a 5D array.
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|---|---|---|
| .. | ||
| _static | ||
| advanced | ||
| basics.rst | ||
| benchmark.py | ||
| benchmark.rst | ||
| changelog.rst | ||
| classes.rst | ||
| compiling.rst | ||
| conf.py | ||
| Doxyfile | ||
| faq.rst | ||
| index.rst | ||
| intro.rst | ||
| limitations.rst | ||
| Makefile | ||
| pybind11_vs_boost_python1.png | ||
| pybind11_vs_boost_python1.svg | ||
| pybind11_vs_boost_python2.png | ||
| pybind11_vs_boost_python2.svg | ||
| pybind11-logo.png | ||
| reference.rst | ||
| release.rst | ||
| requirements.txt | ||
