# cupy.fuse¶

cupy.fuse(*args, **kwargs)

Decorator that fuses a function.

This decorator can be used to define an elementwise or reduction kernel more easily than ElementwiseKernel or ReductionKernel.

Since the fused kernels are cached and reused, it is recommended to reuse the same decorated functions instead of e.g. decorating local functions that are defined multiple times.

Parameters: kernel_name (str) – Name of the fused kernel function. If omitted, the name of the decorated function is used.

Example

>>> @cupy.fuse(kernel_name='squared_diff')
... def squared_diff(x, y):
...     return (x - y) * (x - y)
...
>>> x = cupy.arange(10)
>>> y = cupy.arange(10)[::-1]
>>> squared_diff(x, y)
array([81, 49, 25,  9,  1,  1,  9, 25, 49, 81])