[libdv-dev] Code size

[James B. <ja...@ex...>]

I had a slightly weird experience this afternoon.  I was running some
benchmarks, and found that I was changing about 5% when I built
with/without the ycrcb_to_rgb32.o module.  Even though it wasn't being
called.

I took a look at module sizes and found that we're at about 16k of text:
we're blowing the code cache, and when code moves around (like when you
remove a module) different functions are cacheing against each other and
changing performance in surprising ways.

The code should get smaller as we optmize it, though, so this effect
will go away.  We should be safe if the decode loop fits in 12k.

-- 
James Bowman
ja...@ex...