Avoid re-compilation with every new image

[hoerenj]

Beginner question: I've setup a pipeline that processes incoming images. Obviously, it is recompiled with every new frame. Is this necessary? How can I avoid this without moving to AOT? The pipeline should compile just once, and then process the incoming frames as fast as possible. I have worked through most of the tutorials, it seems most of them use a single input image only. Is there any simple example?

[zvookin]

The code is likely redefining the realized Func or Pipeline for each frame. If the Func is defined, or built, once and reused, it will be compiled once the first time it is called via realize.

[hoerenj]

In my case, Func depends on input, a Halide::Buffer input buffer. To reuse Func (and to avoid re-compilation), I am currently copying any new incoming data to input, which is costly. Can I reuse Func w/o the copying, i.e. realize Func with a different input buffer? (In tutorial 10, it is shown for AOT mode, but I can't figure it out for JIT mode)

[zvookin]

You likely want an ImageParam. The set method of the ImageParam assigns a buffer to the conceptual parameter. This happens without copying the data.

[hoerenj]

That's what I was looking for. Thanks!