[Chicken-users] benchmarking tight u8vector loop

[Kristian Lein-Mathisen]

Hi,

Attached is a benchmarking test that resizes a u8vector of RGB pixels into half the size in each dimension using a pixel average.

I applied Peter's patch which inlines vector-ref and vector-set! procedures:

http://lists.nongnu.org/archive/html/chicken-hackers/2019-04/msg00041.html

With this patch, I see about a 2x speedup which is nice. I see vector_ref and vector_set in the generated C code. However, the C code still has a continuation call inside the main loop. Maybe someone can look into why this is happening.

K.

PS. `convert` comes from imagemagick on most distros

srfi-4-stress-test.scm
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